[HN Gopher] Are sprouted potatoes safe?
       ___________________________________________________________________
        
       Are sprouted potatoes safe?
        
       Author : mooreds
       Score  : 104 points
       Date   : 2022-03-05 13:47 UTC (9 hours ago)
        
 (HTM) web link (www.poison.org)
 (TXT) w3m dump (www.poison.org)
        
       | hallarempt wrote:
       | The thing to do with a sprouted potato is to put in the soil, and
       | then after some time, you've got two kilos of potatoes that taste
       | just slightly different than the potatoes from the original bag,
       | but are just fine anyway.
       | 
       | Doing this is even more fun if you have grade-schooler kids who
       | can do the digging for you.
        
         | riffraff wrote:
         | or keep them in a jar with water for a while! potatoes are
         | beautiful plants :)
        
       | tootie wrote:
       | Alternately, sprouted sweet potatoes are fine and in fact the
       | sprouts can be prepared and eaten. Very tasty
        
         | b3morales wrote:
         | To be clear, sweet "potatoes" are an entirely different genus
         | and species. The similarity is just that both they and _Solanum
         | tuberosum_ produce a starchy edible taproot. It 's the
         | _Solanum_ that 's the key -- all the members of this genus
         | produce solanine to some degree.
        
           | morelisp wrote:
           | Solanum tuberosum does not produce taproots. Potato roots are
           | fibrous; the tuber forms from the stolon. (Otherwise they
           | would probably not turn green - roots rarely contain much
           | chlorophyll!)
        
       | chronogram wrote:
       | Just cut the roots and spots out. That's why you have the little
       | knife on the vegetable peeler. I've never seen a green potato in
       | my life, I'd probably just cut all the green away, maybe that's
       | what happens when you don't keep them in a dry place, like
       | outside of a potato sack.
        
         | ToFundorNot wrote:
         | Or plant it, if it's a decent size, it can yield over 1lbs of
         | potatoes in 3 months. In my area it's low maintenance. If you
         | have limited space, I've had 5 lbs worth in a 15 gallon bag, it
         | has about the same footprint as an office chair.
        
           | Scoundreller wrote:
           | Without trying hard (ie: just burying some buds/ears in soil,
           | no hilling or anything), I got 3lb out of a 5 gallon
           | construction bucket of enriched soil (ie: thirds of dirt,
           | peat moss and compost)
           | 
           | I'll probably do a few more buckets, but kale, tomatoes and
           | peppers get me more value than potatoes.
        
             | jeffbee wrote:
             | Just throwing cut potatoes into my compost heap yields way
             | more potatoes than I personally need.
        
               | randomcatuser wrote:
               | Is this for real?? Is it that easy? I'd like to try that
        
               | jeffbee wrote:
               | It works for me. Into a resting (no longer hot) compost I
               | just bury some cut fingerlings and wait a bit.
        
               | morelisp wrote:
               | I also did this last year when some birds fucked up my
               | balcony garden and left me with a spare pot in June. Cut
               | leftover sprouting store potato in half, chucked it in
               | dirt, watered periodically. Got about 400g of fresh
               | potato back out of it some months later.
               | 
               | The plants are pretty, but don't eat them. Check the dirt
               | a week or two after the blossoms fall off.
        
         | dragonwriter wrote:
         | Green is chlorophyll, which happens if they are in light,
         | mostly. Chlorophyll itself isn't bad, but apparently the light
         | also a accelerates the development of the alkaloids at issue,
         | so it's a signal of unsafety.
        
         | Scoundreller wrote:
         | > That's why you have the little knife on the vegetable peeler
         | 
         | I call that part the gouger
        
         | qiskit wrote:
         | Same here. Sprouted potatoes look absolutely horrible but I
         | can't bring myself to throw out a bag of potatoes just because
         | they look awful. Just cut away and boil or bake. It even creeps
         | me out to even hold sprouted potatoes. I wonder what is it
         | about sprouted potatoes that repulses people so much.
        
           | kijin wrote:
           | To be fair, the sprouts look like worms crawling out of the
           | potato. I guess it's a good thing we find them repulsive,
           | since they're poisonous.
        
           | immibis wrote:
           | The sprouts probably trigger heuristics for avoiding food
           | with fungus growing on it.
        
       | rr808 wrote:
       | > You're better off tossing potatoes that have turned green or
       | grown sprouts.
       | 
       | Jeez no wonder there is so much food waste. Peel off a green
       | part. What's the worst that can happen "vomiting, abdominal pain,
       | and diarrhea", I've never heard anyone have trouble like this
       | from potatoes, I'm sure it happens but no need to waste when
       | people are starving.
        
         | pdpi wrote:
         | Vomiting and diarrhoea can, and will, kill you. I have
         | personally had a particularly bad bout of food poisoning
         | (unrelated to potatoes) where I was dehydrating to the point it
         | was affecting kidney and liver function, and I needed a few
         | litres of fluids IV.
         | 
         | IF you're in a wealthy country and have alternatives, potatoes
         | are cheap enough they're not worth the risk, however small. If
         | you are in such a bad situation that you're at risk of
         | starvation, green/sprouted potatoes might be worth the risk,
         | but you're also taking a genuinely dangerous gamble.
        
           | recursive wrote:
           | I've had vomiting and diahrea and they didn't kill me. So
           | that's a counter example. I also eat sprouted potatoes
           | occasionally and have never experienced so much as a negative
           | thought.
        
         | ouid wrote:
         | What do you mean by food waste?
         | 
         | Most plants grow and then die and rot. We never had any
         | intenton to eat them. It's not particularly tragic.
         | 
         | In America, we subsidize the overproduction of food. This means
         | that we grow more food than we eat. Food waste is exclusively a
         | property of this relationship. Whether you throw it away from
         | your kitchen or the grocery throws it away only matters for
         | your personal expenses.
        
         | JamesBarney wrote:
         | Starvation is like 99% a logistics issue and 1% a food quantity
         | issue.
         | 
         | A more people getting sick from eating green potatoes in the
         | u.s. or Europe isn't going to cause any less people to starve
         | in developing nations.
        
           | kingcharles wrote:
           | Exactly. I badly need food, and I live in a major US city,
           | but I can't get to it because I can't leave my house to go to
           | a food bank. There is a ton of food there, it's just a
           | logistical problem for me.
        
             | CoastalCoder wrote:
             | If you want to name the city, someone here might be able to
             | connect you with help.
        
       | Scoundreller wrote:
       | I'll have to dig through the references, because what I really
       | want an answer to is where the bad stuff is and how safe/risky it
       | is to just cut out those areas while eating the rest.
       | 
       | IE: Take a potato that has sprouted and take samples of different
       | distances from that sprout. It's not like the potato has a
       | circulatory system that moves the bad stuff around.
        
         | spockz wrote:
         | This would be good to know. I always cut out a safe distance
         | from the sprout. Usually it is black and green. The rest I
         | keep.
        
         | mmastrac wrote:
         | This feels like a "reduce your risk to as close to zero from an
         | already ridiculously small risk" article.
         | 
         | I've been cutting bad parts of potatoes off my entire life with
         | no ill effects. If the potato is soft, take off the skin. If
         | the potato sprouts, cut around the sprout (including any off-
         | coloured flesh). After you cook the potatoes, look for any dark
         | spots and cut those away.
        
           | Hendrikto wrote:
           | > I've been cutting bad parts of potatoes off my entire life
           | with no ill effects.
           | 
           | Another datapoint: I also do that and never experienced
           | problems.
        
       | awillen wrote:
       | This is a little confusing in terms of how to handle sprouted
       | potatoes - I was always taught that they're fine if you cut off
       | the sprouts. The fact that it says the sprouts are heavy in
       | glycoalkaloids seems to support that. But the only thing it
       | specifically says is to peel before cooking - even there, I'm not
       | clear if that's specifically if they're sprouted or generally a
       | good idea (though potatoes are served so frequently with the skin
       | on that I have to imagine it's not necessary with fresh potatoes
       | at least).
       | 
       | So what's the deal... cut the sprouts and they're fine? Cut the
       | sprouts and peel them and they're fine?
       | 
       | The bit about not storing potatoes and onions together is
       | helpful, though... I always do that. Time to go separate those.
        
         | ToFundorNot wrote:
         | They're localized to the green/sprouted spots. And to a lesser
         | extent the skin.
         | 
         | I'm not sure how the skin changes in the process, but I do know
         | that the white flesh has minimal changes.
         | 
         | According to German Federal Institute for Risk Assessment
         | (BfR), they provide a more in depth look at it [1]. Fresher
         | potato's are okay with skin on. Damaged, or overly sprouted
         | potato's are not.
         | 
         | [1] https://www.potatopro.com/news/2018/glycoalkaloids-
         | potatoes-...
        
           | awillen wrote:
           | Cool, thanks... I will peel my sprouted potatoes in addition
           | to cutting off the sprouts from now on. The things you learn
           | from HN...
        
       | khendron wrote:
       | This article seems to contradict itself. Near the beginning it
       | says storing at a low temperature can increase toxicity. Then
       | near the end, it suggests storing potatoes in a cool place. Which
       | is it?
        
         | gniv wrote:
         | It's because storing potatoes properly is actually tricky in a
         | house or apartment. At some point I was frustrated that my
         | potatoes were turning green and I did some research. I
         | remembered my grandparents storing potatoes for an entire
         | winter, so it couldn't be too hard. The trick seems to be to
         | store them cool, but not cold. Probably 50s and 60s F (and in
         | the dark). There is no such environment in a typical home
         | unless you have a cold basement or wine cooler.
        
         | mkr-hn wrote:
         | I think of low temperature as the fridge. Cool place would be
         | in the shade or in a cabinet.
        
       | desio wrote:
       | Not having images in this article should be a crime.
        
       | nikolay wrote:
       | Meanwhile, raw potatoties without skins are definitely poisonous.
       | Back in Bulgaria, if kids wanted to skip school, the would eat
       | some raw potato, get fever, and legimitately skip school. They
       | also can disable a car but stuffing a car exhaust with it [1] -
       | it's another fun with potatoes kids had back then.
       | 
       | [1]: https://carfromjapan.com/article/car-maintenance/a-potato-
       | is...
        
       | IYasha wrote:
       | Trace amounts of solanin remain even in the most perfect
       | potatoes. No potato is safe! >:D
        
       | aluminussoma wrote:
       | No matter how much care I take to store Russet potatoes, or other
       | potatoes, they always grow sprouts after a few days. I store them
       | in a paper bag, in my laundry room where it is cold and dark (and
       | the dryer, which I don't use often, exhausts outside).
       | 
       | Yet when I buy them at the grocery story, I see no sprouts.
       | 
       | Given the time it takes to get from the farm to the grocery
       | store, no doubt these potatoes have been sprouting during their
       | journey. Does the grocery store remove the sprouts before they
       | put them out for sale?
        
         | ghostly_s wrote:
         | Are you storing them with onions? Onions give off gas that
         | indices sprouting.
        
         | squeaky-clean wrote:
         | Do you store onions near them? I was having the same issue and
         | it's because I also stored my onions on the same shelf.
        
         | [deleted]
        
         | Scoundreller wrote:
         | I don't think the grocery store picks through the bags, but
         | they (or a directly previous step) may break open 'bad' bags,
         | sort them, and place the remaining good potatoes on the plain-
         | air shelf.
         | 
         | It's probably stored in a "controlled atmosphere" for some
         | duration before getting to your grocery store.
         | 
         | > There was almost complete sprout inhibition, low weight loss
         | and maintenance of a healthy skin for all cultivars stored in
         | 9.4% CO2 with 3.6% O2 at 5degC for 25 weeks. When tubers from
         | this treatment were stored for a further 20 weeks in air at
         | 5degC the skin remained healthy and they did not sprout.
         | 
         | https://link.springer.com/article/10.1007/BF02358471
         | 
         | It's possible that the controlled atmosphere is held as shortly
         | as possible (ie: some of the warehousing is just done at
         | certain temperatures without the gas control).
        
         | 7thaccount wrote:
         | I figured you need to leave them out some place with lots of
         | light lol.
        
         | bythreads wrote:
         | You're doing it wrong ;) Potatoes will sprout if they are in
         | higher temperatures and they are in the dark.
         | 
         | Keep them in the fridge or in the light
        
           | Hendrikto wrote:
           | Does not sound like good advice...
           | 
           | > Toxicity is increased by [...] low storage temperature, and
           | storage in bright light.
        
           | kijin wrote:
           | They'll turn green when stored in a bright place for long.
           | The green parts contain more toxins.
        
         | ToFundorNot wrote:
         | They use sprout inhibitors on large scale potato growing, which
         | are effective in my area (we can keep most potatoes for over a
         | month before there are any sprouts). If you tend to buy from
         | farmers markets, there is a greater chance of them not using
         | inhibitors.
         | 
         | Depending on where you live, they can be in transit for a long
         | period, or you may be in an area that has natural pressures for
         | sprouting.
         | 
         | Short note on sprout inhibitors: https://www2.gnb.ca/content/gn
         | b/en/departments/10/agricultur....
        
           | Scoundreller wrote:
           | oh joy: here's a list:
           | 
           | https://www.potatopro.com/about/sprout-inhibitors
           | 
           | wiki links to each one:
           | 
           | https://en.wikipedia.org/wiki/Chlorpropham
           | 
           | https://en.wikipedia.org/wiki/Maleic_hydrazide
           | 
           | https://en.wikipedia.org/wiki/Ethylene_as_a_plant_hormone
           | 
           | https://en.wikipedia.org/wiki/Carvone
           | 
           | Chlorpropham was just banned in UK/EU. Still in use in USA.
           | "The study also showed that peeling removed 91-98% and
           | washing 33-47%."
        
             | hanniabu wrote:
             | This is so depressing, wtf are we doing
        
             | R0b0t1 wrote:
             | I had a relative involved with a study on pesticide
             | removal. Unfortunately, unless you're using a wire brush,
             | the pesticide isn't coming off your fruit.
        
         | throwaway984393 wrote:
         | > I store them in a paper bag
         | 
         | Does the bag have lots of holes? There needs to be lots of
         | ventilation. You can also use a mesh net bag (the same bag
         | bunches of onions come in) or just mound them in a bowl. Wash
         | and scrub them before use.
         | 
         | > in my laundry room
         | 
         | Put a hygrometer in that room (you can buy a pack of 20 little
         | battery-powered hygrometers from Amazon for $10). If the
         | humidity is above 50, it's too humid. If you don't have another
         | dark dry room, you can put a dessicant in the room to absorb
         | humidity.
        
           | aluminussoma wrote:
           | Now I use brown paper bags I get at the grocery stole,
           | without any holes. I did not notice any success with mesh.
           | Maybe I will try it again.
        
       | amelius wrote:
       | What do large restaurant chains like McDonald's do with sprouted
       | potatoes?
        
         | Zircom wrote:
         | Chains like McDonald's almost certainly don't cut their French
         | fries onsite, they'd get them delivered already cut and frozen.
        
           | simcop2387 wrote:
           | Yep Places like McCain foods do this on an industrial scale
           | that brings the cost so far down that even McDonalds wouldn't
           | be able to compete with. They're still likely going to be
           | doing so much business that they'll be getting a favorable
           | contract for it but it'd still be silly to build out all of
           | that themselves.
        
             | luckycharms810 wrote:
             | This may be inaccurate now - but a few years ago I stopped
             | at Idahos potato museum. If I remember correctly - the
             | McDonald's fries are actually a product of a lot of food
             | scientists hard work. There are multiple types of potatoes
             | involved that are turned in to potato product. Those are
             | then mixed together in a specific ratio before they are
             | reconstituted into fry shape. I think even the combination
             | of oils and temperatures are very specific to McDonald's.
        
           | Scoundreller wrote:
           | In other words, they're probably processed soon after harvest
           | and don't have these issues when frozen.
        
           | zeta0134 wrote:
           | I've worked in a McDonalds. My experience is outdated by a
           | few years, but I don't think I ever once saw real food prep
           | happening in store. Every ingredient is processed at the
           | factory, sealed up and shipped to the store with timestamps
           | and dates for when it expires and should no longer be used.
           | Even the cookies arrive partially baked, with the store doing
           | a minimal final round of heating, all for efficiency. The
           | store workers are basically just doing final assembly for the
           | vast majority of products, and the fries are certainly no
           | exception.
        
             | rootusrootus wrote:
             | Eggs? I think the round eggs are still cracked and cooked
             | on site?. The scrambled square ones come pre-made, though,
             | IIRC.
        
               | 88913527 wrote:
               | Depends on the menu item. The scrambled eggs arrive
               | plastic sealed, arranged in a 2d array. The eggs for
               | McMuffin's are are a regular egg, cracked open on the
               | spot.
        
           | kube-system wrote:
           | This is correct. McDonalds fries are delivered in a bag,
           | frozen. There are chains that fresh cut their fries, but they
           | definitely advertise it when they do, because it is not the
           | norm. (In-N-Out, Five Guys)
        
             | stormbrew wrote:
             | In-N-Out is so infuriatingly proud of doing fries wrong,
             | not parboiling or double frying them, and then crowing
             | about how great it is that they dump just-cut potato into
             | the fryer and serve it to you. Of course you have to pile
             | on a bunch of other stuff to make them good, so the 'secret
             | menu' is essential.
             | 
             | Sometimes putting something in a fridge or a freezer is
             | part of the cooking process, but there's all this stigma
             | around it and bonus points given to things for being
             | "fresh." Fries that get chilled between rounds of cooking
             | are part of what changes them from "deep fried potato" to
             | "french fry".
             | 
             | Five Guys and that peanut oil though.. that's the stuff.
        
           | foobarian wrote:
           | I suspect they pre-boil their fries too. It's the secret to
           | amazing fries.
        
       | account-5 wrote:
       | When it says sprouted does it mean roots or the above ground bit?
       | Because if they mean the roots then I've nearly poisoned myself
       | all the time.
        
         | SamBam wrote:
         | The sprout (the above ground bit) comes quite a bit before the
         | roots -- the roots actually emerge from the stem itself after
         | it has grown quite tall, not from the potato itself.
         | 
         | "Sprouted potatoes" refers to this initial stem starting to
         | emerge.
         | 
         | You've almost certainly been eating potatoes with the above-
         | ground bit growing. They do look a bit like roots.
         | 
         | But, really, it's not that poisonous unless the potato itself
         | is also bright green.
        
       | ehaskins wrote:
       | My grandparents owned a food processing business until the early
       | 90s. One of their main businesses was slicing potatoes to be used
       | in grocery store potato salad.
       | 
       | They had a room dedicated to removing eyes before running them
       | through the peeler.
       | 
       | From the stories I've heard they'd use anything. Potatoes where
       | half the bag is rotten mush, sure. Rotten potatoes where the
       | sprouts have big enough spuds to process, use the sprouted spuds.
       | 
       | I think those were the extreme cases, since they're stories I've
       | heard, but I doubt any similar facility isn't cutting out eyes
       | and processing them today.
        
         | kingcharles wrote:
         | From experience, a lot of this stuff gets redirected to jail
         | and prison kitchens where the labor is free or cheap. Then
         | those guys get to spend their days cutting out eyes and sprouts
         | and sorting the ones full of maggots out as best they can
         | (they're not 100% effective). And then they get served to the
         | denizens.
         | 
         | [the jail I was at would regularly receive entire 40ft semi
         | trucks filled with wet bags of potatoes that were rotting and
         | covered in flies]
        
         | Hendrikto wrote:
         | > From the stories I've heard they'd use anything.
         | 
         | Good. There is enough food waste already. People are just
         | overly sensitive.
        
       | Mikeb85 wrote:
       | I grew up on potatoes from the farm. Tons had small sprouts on
       | them by the time spring came around, we cut them off, ate them,
       | nothing bad ever happened.
        
         | Hendrikto wrote:
         | I have also eaten sprouted potatoes my whole life, without ever
         | experiencing adverse effects.
        
       | helge9210 wrote:
       | Potato is a poisonous plant. Only roots are safe to eat. When
       | introduced in some regions of Eastern Europe people actually died
       | eating wrong parts.
       | 
       | With roots, peeling will remove anything remotely dangerous.
        
         | morelisp wrote:
         | A nitpick: Not all tubers are roots, and in particular potato
         | tubers are stems.
        
       | hn_throwaway_99 wrote:
       | I think this is a perfect example of why there is so much bad
       | "logic" in nutrition science. Everything in this article may be
       | true (potatoes with sprouts have a higher concentration
       | glycoalkaloids), but there is 0 evidence that is something any
       | human actually needs to worry about, especially given the other
       | comments in this thread.
       | 
       | It's similar to the bad advice that was prevalent in the US for
       | decades that eggs are bad for you. Thinking was just basically
       | "People with high cholesterol are at greater risk of coronary
       | disease, and egg yolks have a lot of cholesterol, thus, egg yolks
       | bad." When they did actual studies, they found this to be
       | nonsense for the vast majority of people because eating more eggs
       | did _not_ raise their serum cholesterol levels.
        
         | doodpants wrote:
         | Did you see the "This Really Happened" sidebar next to the
         | article? Sure it's anecdata at best, but certainly worthy of
         | some concern if true.
        
         | morelisp wrote:
         | So one of those Egg Council creeps got to you too, huh?
        
         | funcantor wrote:
         | And too add to this, dietary intake of cholesterol in general
         | has less of an effect on serum cholesterol levels then people
         | realise. This is especially true for eggs iirc due to the how
         | the cholesterol is found within them.
        
         | squeaky-clean wrote:
         | They provide 2 cases at the bottom, one of a woman getting
         | slightly ill and one of a man being hospitalized for 3 days.
         | Sources not listed but I don't really have any reason to
         | believe poison.org is fabricating stories about potato based
         | sickness.
        
         | Mondialisation wrote:
         | Source?
         | 
         | Here is a cohort study of 521,120 participants recruited
         | between 1995 and 1996 and prospectively followed up until the
         | end of 2011:
         | 
         | ''intakes of eggs and cholesterol were associated with higher
         | all-cause, CVD, and cancer mortality. The increased mortality
         | associated with egg consumption was largely influenced by
         | cholesterol intake. Our findings suggest limiting cholesterol
         | intake and replacing whole eggs with egg whites/substitutes or
         | other alternative protein sources for facilitating
         | cardiovascular health and long-term survival.''
         | 
         | https://pubmed.ncbi.nlm.nih.gov/33561122/
        
           | saltdoo wrote:
           | I wonder if the whole egg eaters also ate more bacon?
        
             | anonymouse008 wrote:
             | yeah the nitrates would be a quicker way to cancer in my
             | intuitive brain
        
             | trophycase wrote:
             | It could even be the teflon from the frying pan.
        
           | hn_throwaway_99 wrote:
           | I was specifically referring to when the US, relatively
           | recently, changed the dietary guidelines regarding egg
           | consumption: https://www.hsph.harvard.edu/news/hsph-in-the-
           | news/eggs-fats...
        
           | zamfi wrote:
           | This is a suggestive study, but far from conclusive on its
           | own.
           | 
           | Given the popular zeitgeist around egg consumption, it's
           | quite likely that those who eat eggs are also more likely to
           | engage in other riskier or unhealthful activities.
           | 
           | This study seems to try to look for confounds, but in the end
           | is a self-report study, which (again given common attitudes
           | around egg consumption) means that I'd be looking for huge
           | effect sizes to believe there is something real going on.
           | 
           | As it is, you'd have to believe that people who care about
           | health but eat eggs anyway are less than 7% more likely to
           | underreport their cholesterol consumption. (Number made up,
           | but the effect size in the paper is about a 7% greater risk.)
        
         | jnwatson wrote:
         | Potatoes are nightshades. It is entirely reasonable that in
         | some situations they might be bad for you.
        
           | OJFord wrote:
           | We stored them for months in root cellars before electric
           | refrigeration.
        
             | dragonwriter wrote:
             | Root cellars are better for storing them than
             | refrigerators.
        
         | darth_avocado wrote:
         | I mean growing up in a third world country we did have a
         | grandma's knowledge kind of a thing about sprouted potatoes and
         | avoiding them if it's sprouted quite a bit. However we also
         | were taught to remove the "eyes" and the side of the potato
         | that's turned green and the rest is completely edible. I've
         | been doing this for decades and haven't been even remotely sick
         | even once.
        
         | [deleted]
        
       | antattack wrote:
       | "consumption of moderate quantities of potato tops (2-5 g/kg body
       | weight/day) is unlikely to represent an acute health hazard to
       | humans"
       | 
       | https://pubmed.ncbi.nlm.nih.gov/8655092/
        
         | verelo wrote:
         | So if i take the upper end and the standard winter weight of a
         | male 12 or above (as per Transport Canada weight and balance
         | calculations: https://tc.canada.ca/en/aviation/reference-
         | centre/advisory-c...) of 96.2kg we're looking at thats 481g of
         | green potatoes (or 1.06042lbs for the Americans out there). I
         | don't know about you, but that's a hell of a lot.
        
           | andylynch wrote:
           | More - that study is about the tops i.e. leaves, which are
           | not widely eaten.
        
           | SamBam wrote:
           | ... way too many significant figures...
        
       | croisillon wrote:
       | i had read somewhere that, while the green part may be poisonous,
       | you'd to need eat like 2kg of pure green part "at once" to be in
       | danger
        
       | hulitu wrote:
       | > Now the month-old potatoes are green and have little sprouts
       | growing out of them.
       | 
       | The month old potatoes do not change colour. If they are green
       | than they were green before. They are safe to eat if you remove
       | the green part (which is sour). Sprouts are ok, you just need to
       | remove them and when they are grown it is pretty hard. Basically
       | at the end you need a completely yellow potato to have something
       | edible.
        
         | zby wrote:
         | I have seen it many times with my own eyes that potatoes turn
         | green on sides exposed to light. This is mostly not related to
         | sprouting which happens when they are in a warm place.
        
           | hulitu wrote:
           | To light or sunlight ? I have never seen a potato turn green
           | in basement although there is a little light.
        
       | throwaway984393 wrote:
       | This is one of those "life facts" that I wish we were taught in
       | school, because it's potentially dangerous but doesn't seem like
       | it. I learned about it in my 30s when a partner told me to be
       | careful of the green sprouting potatoes I was about to cook.
        
         | msrenee wrote:
         | The green parts are really bitter. I always figured that was
         | the reason you don't hear much about people being poisoned by
         | green potatoes. They taste nasty enough that it's usually just
         | not a problem.
        
         | Hendrikto wrote:
         | I, for one, am glad this isn't disseminated widely. There may
         | be a theoretical risk, but it's minimal, and food waste is a
         | much larger problem. I always eat my sprouted potatoes.
        
         | kergonath wrote:
         | > This is one of those "life facts" that I wish we were taught
         | in school, because it's potentially dangerous but doesn't seem
         | like it.
         | 
         | It really isn't. You need to eat absurd amounts of stuff you'd
         | not want to eat instinctively (green skin and sprouts). Remove
         | those and there is nothing to be afraid of. On top of that the
         | chemicals in question are very bitter. You wouldn't eat them
         | even ignoring the visual cues.
         | 
         | Same for courgettes [zucchini] and tomatoes. Yes, the plant has
         | some toxic compounds. No, it's not really dangerous (though the
         | risk is higher with courgettes than either tomatoes and
         | potatoes, but bad courgettes are _very_ bitter).
        
           | throwaway984393 wrote:
           | I'm literally saying I didn't know I shouldn't eat the green
           | parts for 30 years, and your response is "Remove those and
           | there is nothing to be afraid of." I didn't know to remove
           | them for 30 years!!
        
             | kergonath wrote:
             | Yeah. What I am saying is that they are gross, and bitter.
             | So most likely is, you'd have removed them without knowing
             | a thing about them or, having left them, you wouldn't have
             | eaten them because the taste would be bad.
             | 
             | And had you eaten them anyway, you'd be in for a mild
             | stomach ache.
             | 
             | Long story short, it is not very dangerous, even if you are
             | completely unaware.
        
       | intrepidhero wrote:
       | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7417869/
       | 
       | In haven't done the math myself but my understanding from a
       | summary I read (back can't find now of course) is that you'd have
       | to eat an absurd amount of green potatoes (specificly the skins)
       | to get near the dose required for ill effects. Don't feed a child
       | or a dog a bag of green potatoes and if you're worried about
       | inflammation yourself, just peel the potato.
        
         | Mezzie wrote:
         | Or small women.
         | 
         | My maternal family is full of fully grown adults less than 5'2"
         | who weigh less than 90 lbs. My mom, grandma, and even my uncles
         | would not have a good time.
        
         | aszantu wrote:
         | Don't know exactly why but suspect that some ppl don't
         | metabolise potatoes well and get very tired after eating them
         | with a meal
        
           | WheelsAtLarge wrote:
           | This used to happen to me after I visited a favorite
           | restaurant of mine. After I ate there I was so tired I had to
           | rest for a few hours. It turns out it was the amount of white
           | rice I ate there relative to my everyday. Rice was always a
           | big part of the meal.
           | 
           | It's commonly referred as a carb or sugar crash. Formally,
           | it's called "Reactive hypoglycemia." It can hit anyone.
           | People have different sensitivity to it but it can really
           | tire you out when it hits.
           | 
           | https://www.mayoclinic.org/diseases-
           | conditions/diabetes/expe...
        
         | dekhn wrote:
         | What I'm trying to understand from your comment: do you think
         | that people haven't died from potato-based solanine poisoning
         | ("I haven't done the math myself..."). It's rare but it happens
         | even if you don't eat massive amounts of potatos.
        
           | intrepidhero wrote:
           | https://en.m.wikipedia.org/wiki/Solanine
           | 
           | It seems like most of the fatalities were related to food
           | shortages, ie people eating very bad potatoes they wouldn't
           | have normally eaten. Alkaloids have a strong bitter taste
           | that makes it difficult to consume enough of them to do harm.
           | Unless you're starving.
           | 
           | My point was just that concentrations in a normal potato,
           | that's turned a little green on the counter are far below
           | anything you need to worry about. If you want to be
           | especially cautious, peel it. But it's a bit of waste to
           | throw them away.
           | 
           | Definitely don't eat the sprouts, or the greens of any
           | nightshade.
        
       | ransom1538 wrote:
       | Also depends where you live. I used to live in CA never saw a
       | sprout on a potato unless I left it on the counter for a month.
       | Here in FL, potatoes sprout the next day you buy them OR even in
       | the bag at the store. Your best bet in a hot climate is the
       | fridge.
        
         | Hendrikto wrote:
         | You shouldn't keep them in the fridge either:
         | 
         | > Toxicity is increased by [...] low storage temperature
        
       | NiagaraThistle wrote:
       | I'm not sure if my household is immune to potato poisoning or if
       | you need an insane amount of bad potatoes to be affected, but I
       | sadly feed my family month old potatoes quite often. I do peel
       | them (as I do 90% of the time when I make any potatoes). I do pop
       | off any sprouts (wouldn't this be common sense?). And I do "peel
       | out" or cut off any blacking bits on the potato (again wouldn't
       | this be common sense?). And if any potatoes are truly moldy I
       | just toss them.
       | 
       | Who is eating potatoes that are so far gone that they are getting
       | sick from them? When a potato is bad, you KNOW it by it's funky
       | smell.
       | 
       | Oh and I store my potatoes and onions in the same container until
       | for days or weeks.
        
         | Scoundreller wrote:
         | Month old? If you're in Niagara, you're eating several month
         | old potatoes in March.
        
           | canadianfella wrote:
        
         | ajsnigrutin wrote:
         | I though this was common sense... first check if it's not
         | really soft, and if it's not, just cut peel and remove the dark
         | spots, and then eat the rest.
        
       | sornaensis wrote:
       | Peel them and boil them. : /
        
         | [deleted]
        
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