Are Sprouted Potatoes Poisonous?

It’s probably happened to you: you’re rummaging through the corner of your pantry when you come across a sack of potatoes with a few pointy sprouty things sticking out every which way. You vaguely remember hearing something about the sprouts being poisonous. Or was that an old wives’ tale? Do you toss ‘em or break out the peeler and masher?

It turns out that the sprouts do contain potentially harmful concentrations of glycoalkaloids, compounds that can have toxic effects. But sprouted spuds aren’t necessarily duds: the root itself is likely still safe to eat, so long as you cut away the little growths.

In a paper published in the Journal of Agricultural and Food Chemistry, USDA research chemist Mendel Friedman explains that “glycoalkaloids are produced in all parts of the potato plant including leaves, roots, tubers, and sprouts.” When consumed in large enough doses, glycoalkaloids can have some pretty nasty effects, like nausea and vomiting. The levels of these compounds in the root itself are generally too low to have any bad effects. But “sprouts contain higher levels than do leaves or tubers,” therefore it’s best to avoid them.

Friedman mentions that “light and heat or mechanical injury stimulates glycoalkaloid synthesis,” which is why it’s a good idea to store your potatoes in a dark place. Light also encourages chlorophyll formation, which is harmless in itself. But it causes potatoes to turn green in the same areas that are at the most risk for being poisonous, acting as a visual clue for the parts you should avoid.

The USDA recommends that “if a potato has begun to grow sprouts, cut off the sprouts before cooking” and to “cut off any skin that started to turn green.” The remainder of the potato should be safe for consumption. If you do notice an unusually bitter taste in the potato, however, this could be a sign of increased glycoalkaloids in the root. It should not be eaten.

In any event, once you’ve de-sprouted your potatoes, the possibilities for what you can do to them are virtually endless. Here are a few of our most essential potato recipes:

1. French Fries


Perfectly golden and crispy on the outside, tender on the inside: it’s every cook’s holy grail. We’ll get you there with our double-fry technique. Get our French Fries recipe.

2. Easy Potato Skins


Did someone say game day? Our recipe for this quintessential game-watching food is easy and hassle-free, so you’ll have plenty of time for keeping your eyes on the plays. Get our Easy Potato Skins recipe.

3. Perfect Baked Potatoes


Baked potatoes are the culinary equivalent of a blank canvas: you can decorate and elaborate on them up any way you want. Add some vegetables, some cheese, meat, whatever, and you’ve got a complete masterpiece of a meal in itself. Get our Perfect Baked Potatoes recipe.

4. Hash Browns


Happiness might just be a plate of crispy hash browns on a bleary-eyed Sunday morning. And ours are the crispest of them all, calling for just a little extra elbow grease and arm work to get them to their best golden brown. Get our Hash Browns recipe.

5. Herbed Potato Salad


A vinegary, herb-laden potato salad is the perfect counterpart to rich and fatty meats. Serve it next to ribs at your barbecue, sausages on German night, or pretty much anytime you’ve got a hankering for something tart and puckery. Get our Herbed Potato Salad recipe.

6. Classic Mashed Potatoes


This is an easy, four ingredient recipe worth returning to again and again, for a dish that's returned to again and again. Buttery and whipped fluffy, they'll serve you well from summer cookouts to Thanksgiving. Get our Classic Mashed Potatoes recipe.

7. Perfect Roast Potatoes


If there’s an all-purpose, goes with everything version of potatoes, it’s this. A handful of rosemary and garlic gives these spuds enough flavor to stand out on their own, yet they're still versatile enough to go with just about anything. Get our Perfect Roast Potatoes recipe.

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