Ask the Doctor: Q&A with Dr. Greger

Answers to featured health and nutrition questions provided by Michael Greger M.D. Questions are taken from the video and blog comments throughout the site. Join in the discussion and get your question featured!


Q: Is hempseed oil beneficial to adults with eczema?

Is hempseed oil helpful to adults with eczema

I’d be interested in your opinion of this study I found online at http://www.finola.com/FinolaOilandAtopy.pdf. This is regarding hempseed oil, not necessarily for children but for adults with eczema. Have you seen other studies looking at hempseed oil and eczema? Is it ok to take so much oil...

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Q: Should we avoid celery to prevent colon cancer?

Celery for Colon Cancer Prevention

Class participant heard that celery should be avoided for colon cancer patients. Only thing I’ve read about celery is to consume only ‘organic’ as conventional grown veggie is extremely high in pesticides. Do you know any other reason it should be avoided? Thanks.

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Q: Should we avoid canned tomatoes and non-organic root vegetables?

Avoiding Canned Tomato and Non-Organic Root Vegetables

I’ve seen a number of blog posts about some food scientists stating that if you avoid ANY food, canned tomato products and non-organic root vegetables should be at the top of your list? Do you know anything about these statements? Is it just the opinion of a few researchers or is there a lot of...

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Q: The dangers of fluoride (tap water fluoridation)?

Fluoride in Tap Water

Dr. Greger, I have heard some talk about the dangers of fluoride. When I research this all I stumble upon are propagandists websites without scientific backing. Is there any truth to these claims that fluoride in our water supply and toothpaste is damaging our health?

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Q: What about pepper plus turmeric in V8 juice?

Powerful Pepper + Turmeric

I stirred 1 teaspoon of powdered amla into my daily glass of V8 juice, along with a sprinkle of black pepper and 1/2 teaspoon turmeric – tasted OK.

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Q: How much cinnamon is too much?

Toxicity from Cinnamon

Does the anti-oxi value decrease with age of spice (or berry)? If so, how much? Second, how much is “toxic”? I heard taking more than 1-2 tbsns of cinnamon a day could be toxic. Is one hurting oneself if one takes 2 tbs of all the above mentioned spices a day?

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Q: Sulfite sensitivity from sulphur dioxide in dried fruits?

Sulfite Sensitivity from Dried Fruits

I eat dried fruits (prunes, raisins, apricots and now apples) daily. Please tell me your thoughts about what may be the cumulative effects on an aging body of sulphur dioxide preservatives used in processing fruits for drying.

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