Ask the Doctor: Q&A with Dr. Greger

Answers to featured health and nutrition questions provided by Michael Greger M.D. and Joseph Gonzales, R.D..

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


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

Is it true that antioxidants can actually cause cancer?

There has been a buzz around the internet from headlines like this: Study: Antioxidant use may promote spread of cancer. Whenever I see a title like this I take a step back to see what's really going on. The most healthful and nutrient-rich foods in the world come from plants, which...

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Q: What are the hazards of oxalates?

What are the hazards of oxalates?

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 other effects? Possible subject: “How should vegans get enough...

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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...

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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 information.

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Q: Should we take iodine supplements?

Should we take iodine supplements?

Iodine intake will depend on your overall diet. Healthy adults need 150 micrograms a day. Iodine is also found in vegetables grown near costal areas but actual amounts of iodine are of course not listed on whole vegetables. I would not rely on coastal veggies as a complete iodine source, however,...

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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...

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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 this....

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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...

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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...

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Q: What about the “cholesterol myth”?

Endo_dysfunction_Athero

I would love to see more debate with regard to…cholesterol/saturated fat proponents (Gary Taubes, for example). I don’t know how many times people have recommended I read Taubes books….Just look at the reviews on Amazon for Johnny Bowden’s The Great Cholesterol Myth!...

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Q: Might too many antioxidants cause cancer?

1280px-B_vitamin_supplement_tablets

Could you please comment on the recent statement by James Watson (DNA discoverer) that antioxidants can actually cause cancer. pprender / Originally Posted in Maxing Out on Antioxidants Answer: The full-text of Jim Watson’s article can be found here. As you can see, he’s talking about...

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