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: What is a good source of probiotics?

Do Vegans Need Probiotics

For vegans who don’t eat yogurt, what is a good source for probiotics? Probably not Kimchi, as you noted its harmful effects in another video!2RHealth / Originally posted on Gut Flora & Obesity Answer: Commercial yogurt of any kind (soy, rice, cow, or coconut) is an insufficient...

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Q: What about using chai tea in oatmeal?

Chai Tea Oatmeal

To make your morning oatmeal even “yummier”, use chai tea instead of water when making it.yummy / Originally posted on The Healthiest Beverage Answer: What a fantastic idea! I’m always trying to think of ways to sneak more of those antioxidant-packed spices into my daily diet (that...

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Q: Are green smoothies better for you?

Green Smoothies

What about green smoothies? I blend apples, bananas, blueberries and spinach.Heidi Woodruff / Originally asked on Best fruit juice Answer: I’m a huge green smoothie fan! You’re taking the healthiest thing on the planet (dark green leafy vegetables) and releasing all that nutrition (you...

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Q: Soy-based (Gardein) vs. mycoprotein-based (Quorn) veggie chicken: which is better?

soy-based vs microprotein based fake chicken

Is this a soy-based or mycoprotein-based fake chicken???? I don’t eat any soy, but I do eat some mycoprotein (QUORN). Would love your opinion on it.wickedchicken / Originally posted on Chicken vs. Veggie Chicken Answer: Great question wickedchicken (and true to your namesake :). Gardein...

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Q: How can I avoid the top 10 leading causes of death?

Top Causes of Death in the US

Ok, Alzheimer's is the sixth. I want to know all the top 10. Someone told me no tobacco, no alcohol, no animal products and regular workout is enough to avoid the top 10. Is that true?Meha / Originally asked on Amyloid and apple juice Answer: If you click on the Sources Cited section under...

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Q: Where does the fat come from in a skinless chicken breast?

Fat in chicken

There is so little visible fat on chickens e.g. a skinless chicken breast. I don’t see how it’s such a high ratio.wickedchicken / Originally posted on Does eating obesity cause obesity?Answer: Much of the fat in chicken is in the muscle (meat) itself, what’s called intramyocellular...

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Q: In making water alkaline, how much baking soda is too much?

Levels of Baking Soda in Alkaline Water

http://www.nlm.nih.gov/medlineplus/ency/article/002749.htm I wish they said what constituted a “large amount”…. yikes.wickedchicken / Originally posted on Alkaline water: a scam? Answer: Sodium bicarbonate (baking soda) intoxication can be devastating, especially in infants. The 1995...

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Q: Is the Dukan Diet safe?

Dukan Diet: America’s Low Carb Craze

I feel sorry for people’s bodies if they are on the Dukan Diet. Logic is clearly out the window when it comes to weight loss diet desperation. wickedchicken / Originally posted on Plant protein preferable Answer: The Dukan Diet appears to be a European spin-off of the Atkins Diet. The...

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Q: Are krill oil supplements better than fish oil capsules?

Krill Oil Supplements

Just wondering if Krill Oil supplements are any better than fish oil capsules. Do you have any suggestions on the best way to get the benefits of fish without actually eating it?yummy / Originally posted on DDT in Fish Oil Supplements Answer: The longest study I could find done on krill oil...

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Q: What is the recommended child requirement for vitamin D?

Children's Vitamin Requirements

I just watched your newest video and it was fantastic as usual. The segment about the adult requirement of 2000 units/day for Vitamin D was interesting and helpful. Can you please tell me what a child’s requirement is likely to be? We have a three year old.Stacia / Originally posted...

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Q: What is the definition of a “handful” serving of nuts?

Defining Handful of nuts

Just wondering what was their definition of a “handful” of nuts? 25 grams? 8 nuts? Big difference in opinion from one person to the next as to what is a “handful”. Many thanks. wickedchicken / Originally posted on Milk Protein vs. Soy Protein Answer: “Handful” of nuts typically...

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Q: Could a low-salt diet be bad for your heart?

Heart Health issues with a low-salt diet

Hello Dr. Greger, I was curious about your take on a new report of a recent study (http://www.msnbc.msn.com/id/45224421/ns/health-heart_health/#.TrrabPSImU8) that appears to demonstrate possible heart health issues with a low-salt diet (increases cholesterol, increases fat, increases hormone...

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Q: How do you explain never getting Salmonella from eating raw cake batter?

Eating Cake Batter & Salmonella

When I was growing up, I ate raw cake batter and I never got sick from Salmonella. How do you explain that?berensen75 / Originally posted on Total recall Answer: Egg-borne Salmonella is relatively new disease. Our grandparents could drink eggnog and eat raw cookie dough without fear of...

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Q: What about Semmelweis and medicine’s shameful handwashing history?

Washing your Hands

Another one: The fact that cleaning your hands would prevent the spread of disease was ignored and ridiculed for about 50 years…Jan-Kristian Markiewicz / Originally posted on The Tomato Effect Answer: Oh that’s a great Tomato Effect example! Everyone should know about Ignaz Phillip...

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Q: How can we reach out to doctors with this life-saving information?

Bringing the fun back to medical practice

Last week I got a yearly visit from a 40 year old patient who had had ulcerative colitis for 20 years. I told him to stop dairy and read your 2001 paper. He thanked me for his colitis stopped forthwith and since he cut all dairy. In chapter 1 of The China Study the ‘error’ with alpha F protein...

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Q: What are the benefits of diet in juvenile rheumatoid arthritis?

Juvenile Arthritis and Diet

Why there is no research about drugs vs diet among the arthritic children. Is it because they are the best silent golden goose in the history of the disease? Methotrexate facilitators pronounce to us a life sentence of pain and deformation and say that diet has no meaning in curing this ailment....

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Q: What is the best diet for kidney stone prevention?

Kidney Stones and Diet

I just had a kidney stone and really don’t want to have another one. I looked online and there are conflicting things about what I should eat to prevent a recurrence. What is the best diet?vetstud / Originally posted on Oxalates in cinnamon Answer: I’m going to assume you have what’s...

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Q: Is the Eat Right For Your Type (blood type) diet fact or fiction?

Blood Type and Diet

Some people I know tell me that because they are not a Blood Type A, they need to eat meat or dairy or whatever; and I know people who claim that they were vegan for blah blah years and they almost died, and felt so much better after they started eating the meat or dairy or whatever again. I...

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Q: What’s the right dose of saffron?

Saffron Dosage

30 mg transposes into about how many stigmas per day?eileenmcv / Originally posted on Saffron versus Aricept Answer: The typical dose used in the studies of saffron versus Alzheimer's, versus PMS, and versus depression was indeed 30mg. Each flower yields 7mg dried saffron, and I think...

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Q: Is apple cider vinegar good for you?

Apple Cider Vinegar and Health

I have heard that apple cider vinegar which I know contains potassium, that is can also leach potassium, and can thus contribute to high blood pressure. Do you have any information about this? aeason / Originally posted on Is vinegar good for you? Answer: There are a baker’s dozen of...

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