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!


What are the benefits of flaxseeds?

The benefits of flaxseed consumption are many, including: Reducing inflammation Weight loss Reducing hypertension Preventing and improving survival of breast cancer Improving prostate cancer survival Lowering blood sugar Improving ovarian function Looking for ways to incorporate ground flaxseeds into your menu? Check...
Can Flax Seeds Help Prevent Breast Cancer?

Can you cook with flaxseed? Does it destroy the nutrients?

No. Ground flaxseed added to baked goods has been shown to keep lignan stability up to 350°F. Flaxseed has such fantastic benefits that it’s in my Daily Dozen, but concerns about the naturally occurring cyanide content have recently surfaced, which is why...
Are Weight Loss Pills Safe?

Do weight loss pills work?

An analysis of more than a hundred clinical trials of anti-obesity medications lasting up to 47 weeks found that drug-induced weight loss never exceeded more than nine pounds. Considering the cost and side effects, that’s a lot of money and risk for...
Is It Best to Drink Tap, Filtered, or Bottled Water?

How can I boost my metabolism?

Drinking two cups of water increases the metabolic rate of men and women by 30 percent. The metabolic boost starts within ten minutes of drinking water and reaches a maximum within an hour. In the 90 minutes after drinking a single, tall...
Vitamin B12

Can you get vitamin B12 without eating meat?

Yes. A regular, reliable source of vitamin B12, which is critical for anyone eating a plant-based diet, can be taken in the form of a supplement or B12-fortified foods. Vitamin B12 is not made by plants or animals, but by microbes that...
B12 shot

Is a vitamin B12 shot better than taking B12 orally?

Your doctor may want you to get vitamin B12 shots, but did you know that oral B12—even for those who can’t absorb it well—has long been considered one of medicine’s best kept secrets? In fact, it's been found that B12 supplements taken...
best diet for weight loss

What is the best diet for weight loss?

The best diet for weight loss is a whole food, plant-based diet. In a randomized, controlled, community-based trial, participants were instructed to eat a whole food, plant-based diet without any calorie counting or portion control. They could eat as much as they...

How much apple cider vinegar is needed for weight loss?

I recommend two teaspoons of vinegar, including apple cider vinegar, with each meal. Never drink vinegar straight, though. Instead, flavor meals or dress a side salad with any of the sweet and savory vinegars out there. If you want to drink it,...
Keto Diet Results for Weight Loss

Why am I not losing weight on a WFPB diet?

Three primary factors may be frustrating your attempts at weight loss even while on a whole foods, plant-based diet: evolutionary hard-wiring, metabolic adaptations, and calorie density. Let me break them down for you. First, evolutionary hard-wiring. We evolved over millions of years...
Benefits of Green Tea for Boosting Antiviral Immune Function

Are there certain foods that are helpful for weight loss?

Yes, indeed, and I cover the best ones in my book, How Not to Diet, including these broadly available and safe to consume foods that have been identified as weight-loss accelerators: Black cumin Cumin Garlic powder Green tea Ground ginger Nutritional yeast...
B12 nutritional yeast

What foods contain vitamin B12?

Vitamin B12 Supplements vs B12-Enriched Foods A regular, reliable source of vitamin B12, whether from supplements or fortified foods, is critical for anyone eating a plant-based diet. If you want to get your B12 from fortified foods rather than take supplements, you’d...

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