Ask the Doctor: Q&A with Dr. Greger

Answers to featured health and nutrition questions provided by Michael Greger MD and the NutritionFacts.org volunteer moderator team.

Questions are taken from the video and blog comments throughout the site. Join in the discussion and get your question featured!


Q: What is a healthy way to gain weight?

Question: I am underweight and would like to gain weight in a healthy way.  Do you have any recommendations?  Answer:As explained in my video Eating More to Weigh Less, the key to healthy longterm weight loss is understanding calorie density and eating low calorie-dense foods. When applied in...

Q: What are some options for trainings on Lifestyle Medicine?

I am a medical student and would like to obtain more training in nutrition and lifestyle medicine. Are there any residencies for Lifestyle Medicine?  If not, what are some other training opportunities that can I pursue?  Answer:Thank you for sending in this question!  If you are like most US...

Q: Do nuts and seed have a high acid load that could be bad for the kidneys?

Do nuts and seed have a high acid load that could be bad for the kidneys?

Thank you for this informative video - have been cutting down on high oxalate foods in attempt to prevent another stone, but don't want to cut out all those delicious dark leafys. Any idea where nuts/seeds/legumes fall along the LAKE scale? ashelton / Originally posted in How to Treat Kidney...

Q: Is it true that antioxidants can actually cause cancer?

Is it true that antioxidants can actually cause cancer?

Hi Dr. Greger, appreciate all your work. There's been a lot of bad news a about antioxidants recently. Should people be concerned about how much they ingest?  Ren / Originally posted in Acai to Zucchini: antioxidant food rankings Answer: Good question! There has been a buzz around the...

Q: What are the hazards of oxalates?

What are the hazards of oxalates?

CC / Originally posted in How to Prevent Kidney Stones with Diet You mention oxalates in other videos. But a vegan friend of mine has found that many of the veggies that are great sources of calcium are also high in oxalates. I understand they can affect kidney stones and the gall bladder. Any...

Q: What can I do to lower my cholesterol? It seems I’ve tried everything!

What can I do to lower my cholesterol? It seems I've tried everything!

Help! I went vegan for 4 months with no statins. My cholesterol shot up to 280. (From 180). On statins and a diet with rare "tastes" of meat and dairy, I am at 170-180. I would hate to take more statins, any suggestions? Carolynn / Originally posted in Everything in Moderation? Even...

Q: What is the latest verdict on the proclaimed health benefits of coconut oil?

Whats the latest verdict on the proclaimed health benefits of coconut oil?

Coconut oil has its advocates. It can be purchased in health food shops and often appears as an ingredient in vegetarian and vegan recipes. However, I have my doubts regarding its proclaimed benefits. I would appreciate your opinion, is it good or bad? Thank you. Eddie/ Originally posted in The...

Q: What does the research say about dietary interventions on women with PCOS?

What does the research say about dietary interventions on women with PCOS?

Is there anything that can lower DHEA? Also, is there any information about the cause of PCOS? I keep hearing it is Insulin Resistance, but my Insulin/Glucose were only midly resistant, but my DHEA is three times too high. I don't see Insulin as preceeding the high DHEA due to DHEA being so high...

Q: What are some ways to help reduce the risk of food poisoning from pesticides?

What some ways to help reduce the risk of food poisoning from pesticides?

The article (Viral Food Poisoning from Pesticides?) raises issues, but what do you recommend we do as a response? e.g. I noted in the comments below one reader suggests a 10% vinegar solution. I myself do a vigorous wash of my veg before consumption. I think many would appreciate and benefit from...

Q: Should I stay away from soy if I have breast cancer?

Should I stay away from soy if I have breast cancer?

I am now confused. I was told by my oncologist and internist to stay away from soy after I was diagnosed with breast cancer. My tumor was estrogen positive and I was told that soy mimics (or something to that affect) estrogen. It is very upsetting to have such contradictory...

Q: Should we take iodine supplements?

Should we take iodine supplements?

I've had a question regarding iodine for some time. As far as I know there are few options: - iodised salt- seaweeds- supplement I believe sodium-intake should be minimized, so that's a no. I've also read about many pollutants in seaweeds these days. Is supplementing currently the best way to...

Q: Aren’t all studies funded by corporations biased?

Indusstry Influence

If they received "grant money from a kiwifruit company", then why is their study any less biased than those studies you previously referred to that were funded by the salt or dairy or meat companies. Isn't the whole purpose of science to reach objective explanations by eliminating biases? If so,...

Q: Boric acid for vaginal yeast infections?

June10 AtD Yeast Infection

I have [had vaginal yeast infections] for years now (comes and goes). For almost a year I am vegan. My diet is nutrition dense, whole foods and no processed foods, but I still have vaginal discharges, sometimes very heavy. I rarely drink coffee. Please, do you have an information on...

Q: Can diet be used to treat kidney cancer?

May 16 AtD Kidney.062

I've been diagnosed as follows: Papilary renal cell carcinoma. The carcinoma is metastatic (Stage IV). Wondering if you have any subscribers know of anyone who have beaten this type / stage of metastatic cancer using diet? Any advice you have would be greatly appreciated. I need to make a decision...

Q: Didn’t another study show carnitine was good for the heart?

May 15 AtD Carnitine

Please take a look at yet another study ("L-Carnitine in the Secondary Prevention of Cardiovascular Disease: Systematic Review and Meta-analysis") (http://www.medpagetoday.com/upload/2013/4/12/jmcp_ft88_4_2.pdf)...is this a case where the substance (LCar) itself is beneficial, but the by-products...

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