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


Any update on the scary in vitro avocado data?

any updates on avocados in vivo? Toxins  / Originally Posted in Are Avocados Bad for You? Answer: I'm happy to report that a new study this year found avocado consumption associated with significantly reduced prostate cancer risk (a third cup of avocado...

What do you drink, Dr. Greger?

Dr. Greger ~ Are you still drinking that yummy Hibiscus Tea? (I did not see it in your "morning mix"!) Kenton R. Mullins  / Originally Posted in A Better Breakfast Answer: A half gallon a day Kenton! I no longer do the teabags,...

What are “normal” human vitamin D levels?

I assume the lifeguards were caucasian? With a “built in” SPF of 15 what blood level of Vit D does the lifeguard of African descent attain? Perhaps that is a better clue for evolutionary “normal”. CapeBreton / Originally Posted in Evolutionary argument for...

What do you think of durian fruit?

Dr. Greger, have you ever eaten a durian fruit? They are so fascinating, though I’ve never seen a real one. Kevin McCaffrey / Originally posted on the NutritionFacts.org Facebook page Answer: Durians have to be the most badass of fruits. Imagine a 5 pound football...

Are neurotoxins only present in blue-green algae?

As you have reported, the effects of animal based omega-3 supplements can prove to be ironically, inflammatory. While you recommend utilizing algae as an alternative, is there concern over the neurotoxins (as you have discussed in other videos as present in spiralina),...
Gurmar, Jamun, Bitter Melon, and Fenugreek

What about gurmar, jamun, bitter melon, and fenugreek?

What is your take on the following substances? Gurmar…jamun… bitter melon…[and] fenugreek?   Lastly, Dr. Greger what do you think of Citruline and L Argenine in their role as helping out in repairing the endothelium cells ( Citruline ) and the later helping in promoting...

Is yerba maté tea really bad for you?

Whoa! Really?! It seems there must be a lot of problems for the South Americans who consume loads of this daily? I haven’t read anything negative — any other info on how this is affecting people who have been drinking it for...
Mercury in Fillings and Canned Tuna

How did you do the mercury fillings and canned tuna calculation?

How did you come up with your calculation about how many mercury-containing dental fillings are equivalent to eating a can of tuna once a week? vetstud / Originally posted in Amalgam Fillings vs. Canned Tuna Answer: Three national brands of canned tuna...
The Benefits of Coconut Water

Is coconut water good for you?

I have seen several health experts talk about the benefits of coconut water that comes straight from a young Thai coconut. However, I have read conflicting information about the coconut water one can get in packages (such as Vita CoCo)…These days, coconut...

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