Trying to figure out whether consuming that much sweet potatoes could have something to do with it. I’m happy I found and read the comments from people writing in to the “Science Line” website, Newsletter and telling about their experience of becoming ill after eating sweet potatoes that had mold. I’ve developed some odd rashes that don’t go away. I cut another wedge off and the same thing happened. 3. Sweet potatoes require loose, well-drained soil and about 100 very warm days. And of course, everyone forgets about that bag soon enough. If you notice sprouts on your sweet potato, just cut off the growths and cook as soon as possible. What Do Green Spots on Potatoes Mean? If you are interested in any of these topics, read on. The flesh also ranges in color from white to yellow, orange or orange-red. The exception is mold spots; if a sweet potato has begun to mold, throw it away. After you have cooked the sweet potatoes, you should store them in the refrigerator. While pithy sweet potatoes are safe to eat, their quality, and therefore taste, is inferior. “Toxicants Occuring Naturally in Foods” mentions that yams don’t make these chemicals when moldy, but they didn’t include a citation for it. After cutting the potatoes transfer them into an airtight container filled with water and put into the veggie drawer in your fridge. When it comes to cut sweet potatoes, they probably can last even a week or so in the fridge if stored properly. Unlike regular potatoes, which are underground stems, sweet potatoes are roots and are a part of the Convolvulaceae, or the morning glory family. Later a white fungal growth develops on lesions. Nevertheless, for quality reasons, I suggest using these within a day or two. That sweet potato probably isn’t spoiled, but it will taste bad, so there’s no point in cooking it. Interesting, especially since the skins are often served. As sweet potatoes begin to spoil, they will shrivel (like the one on the photo above) as they lose moisture. When it comes to defrosting and reheating frozen sweet potatoes, there are a few options: Fresh raw sweet potatoes last about two weeks in the pantry. She cut off the skin where the the dark spots were and microwaved it. Your email address will not be published. These spots do not indicate spoilage, and you can simply remove them before cooking. mom said to one day and I filed it away?). I was always told as a child to eat the skins, but (rebellious me, I guess!) Storing cut sweet potatoes without water. It is not a sign of spoilage, and the sweet potato still edible at this point. Preventing Mold on a Sweet Potato Plant. If potatoes are turning green, this is usually due to increased amounts of a toxin known as solanine. For two years following graduation she played with neurons as a research technician at the University of Pennsylvania and The Children’s Hospital of Philadelphia. First, inspect your sweet potatoes for any bad spots or signs of damage. She said it did not taste great and left most of it, however about 2 hours after eating it she felt ill with stomach pains and nausea, she has now been unwell for about 36 hours and is only improving slowly.. She finished a 5 month course of chemo about 2 months ago, I am sure her immune system is still compromised from that and so more susceptible to bacteria and toxins.  Ipomeanine (IPN), 4-ipomeanol (4-IPO), 1-ipomeanol (1-IPO), and 1,4-ipomeadiol (DIOL) are toxic 3-substituted furans found in mold-damaged sweet potatoes. A project of the If I moved my finger across the spots, they absorbed back into the sweet potato . One of those phenols, called chlorogenic acid, is the culprit that makes sweet potatoes -- and sometimes, regular potatoes -- darken when they're cooked. Thanks for the amusing blog. The Shortest Distance Between You and Science, A project of NYU's Science, Health and Environmental Reporting Program, sweet potatoes can churn out a bunch of nasty chemicals. Strange, as I tend to enjoy normal potato skins in my food, and it would follow that potato skins that are delicious in one way would be good in another way, too…but thanks for saving my LIFE in case I ever was going to binge on sweet potatoes. Aspergillus – this mold can appear green, yellow, brown, grey, or even white, and is often found growing on and inside walls. However I would say make sure sweet potatoes are fresh and undamaged before eating them. Source(s): https://shorte.im/a0uha. It is hard to believe, but after 43 years I just recently discovered sweet potatos. Many thanks!! 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