Doctor's Note

Check out these videos to learn more about sweet potatoes:
Anti-Cancer Potential of Sweet Potato Proteins
The Best Way to Cook Sweet Potatoes

And check out my other “HHH” videos (Harmful, Harmless, or Helpful?) – listed below the post.

For more context, please check out my associated blog post: Soymilk: shake it up!

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  • Michael Greger M.D.

    Please feel free to post any ask-the-doctor type questions here in the comments section and I’d be happy to try to answer them. And check out the other “HHH” videos (Harmful, Harmless, or Helpful?). Also, there are over a thousand subjects covered in the rest of my videos–please feel free to explore them as well!

  • dddave

    So are you saying that it is bad to eat potato skins? I thought they had healthy nutrients?
    -thanks, Dave

    • Alexandra Georgiadis

      Hi Dave,
      You’re better off not eating the skins.  Although they may contain nutrients, potato skins are still not worth eating due to their toxic properties.  Peel the skin, and try to occasionally substitute white potatoes with sweet potatoes to boost your nutrient intake.
      I hope this helps!

  • Doctor, Do you recommend that we peel our sweet potatoes as well?

    • Michael Greger M.D.

      No need!

  • Two questions: 1) What about white sweet potatoes? Mayo clinic was mentioning only orange sweet potatoes, which I don’t like. But I like white sweet potatoes a lot!
    2) What about sweet potato skin? A skin of regular potato is harmful, is the skin of sweet potato OK?


    Could you clarify what you mean by white potatoes? Would this include russets, yukon golds, etc.?

    Thanks a lot! I love your website :)

    • Michael Greger M.D.

      Yep–even purple potatoes! (though they may have special properties).

  • I get to eat this sweet healthy food. Woot!

  • yummy

    Here’s some new and different sweet potato recipes I found…some even using Dr. G’s favorite spices.

  • lovestobevegan

    Now that we know we can eat nuts ( and nut butters ( without fear of weight gain we can use them to flavour this surprisingly amazing stew which just so happens to contain one of the healthiest vegetables

    Peanut/Almond Butter Barley Stew

    -1 ½ cups barley*
    -3 cups water/homemade vegetable broth
    -1 red onion, chopped (
    -2 cloves garlic, minced (
    -½ inch piece of fresh gingerroot, minced
    -4 carrots, diced
    -1 large sweet potato, cubed
    -jar strained tomatoes
    -1 tsp cumin
    -pinch cayenne pepper
    -2 tbsp unsalted peanut or almond butter
    -chopped peanuts/almonds for garnish
    -sea salt and black pepper to taste

    Place all ingredients except peanut butter, peanuts, and salt into a large soup pot. Cook for 40 minutes until barley almost cooked. Add peanut butter and cook until it has melted and heated. Season to taste with sea salt and black pepper. Serve garnished with peanuts.

    *If sensitive to gluten substitute with buckwheat

    ~Complements of lovestobevegan

    • Sounds yummy! Thank you for sharing. Anyone else have any recipes to share?

  • VegFam

    What about yams? I see sweet potatoes and yams used interchangeably in the store often. Following the rule of more colorful usually = better, I’d pick a garnet yam over the less colorful sweet potato. But which is actually better?

    We eat whole food/plant based in our family, and have a young child, so I’m conscious of what we eat. But the sweet potato/yam question is still unclear to me. Thanks!

    • Toxins

      I would not worry about this, because both of these foods are quite healthy. Usually it is the case that the more colorful foods have more antioxidants but these foods are both very healthy so its not much concern.

  • I have found an interesting fact about sweet potato :

  • Jaron

    I always like to check sources. But in this case, there’s an apparent contradiction. Salmon is also in their top ten healthiest foods list, so by the exact same logic, salmon is also great for you! But I thought you were against all fish consumption (mercury, PCB’s, heterocyclic amines, etc.)?

  • OlaTG

    When it comes to peeling the white potatoes, does this apply also to organic potatoes?

  • Dutch-vegan

    Dear Dr. Greger,

    I was wondering about the different types of sweet potato. In my local supermarket they sometimes have the ones with orange flesh but more often the red ones with white flesh, though they’re sold under the same name.

    Both ok, or just the orange ones?

    Thank you,

    Coen (from the netherlands)

  • Jessika

    I recently read that white potatoes contain antinutrients. Is this also true for yams?