START A PETITION 27,000,000 members: the world's largest community for good

Burning Fat With Flavonoids

Nuts appear to boost one’s metabolism, such that when we eat nuts we burn more of our own fat to compensate. In my 2-min. video, Testing the Fat Burning Theory, I show that people who don’t eat nuts tend to burn off around 20 grams of fat a day–about 5 pats worth of butter, but those eating walnuts averaged more like 31 grams–7 or 8 pats of butter. In the video featured above, I explore one theory as to why this may happen.

It may also be the flavonoids, phytonutrients found in nuts as well as citrus, berries, red onions, beans, green tea, grapes, and cocoa, that may boost our metabolism enough to significantly slim our waistline. Based on what kind of evidence? I showcase a study done on purple grape juice in my video Fat Burning Via Flavonoids.

Just like nuts are calorically dense yet don’t seem to cause much weight gain (see my Care2 blog on Wednesday), Welch’s was hoping that the same would be found for their grape juice. They had people guzzle down 2 cups a day for three months. Keep in mind that Welch’s grape juice has more sugar than Coca Cola. Two cups of purple grape juice contain the equivalent of 20 spoonfuls of sugar. The control group was basically given grape Kool-Aid instead, with the same number of calories and same amount of sugar, but no detectable phytonutrients.

At two cups a day study subjects were getting hundreds of extra calories a day. Surely after 3 months they’d gain a couple pounds. Indeed that’s what happened in the grape-flavored sugar water group—how could they not with all that extra sugar in their diet? The grape juice group, on the other hand, did not. In fact, their waist circumference shrunk significantly. Drinking grape juice appeared to burn away significantly more tummy fat. So maybe there is something to the theory put forth by the nut and green tea researchers that flavonoid phytonutrients are capable of helping the body burn fat. If true, then it’s just one more reason to eat nuts and drink green tea—not grape juice. Instead of the juice, I’d recommend eating concord grapes, the source of purple grape juice that you may be able to find at a farmer’s market near you.

In health,
Michael Greger, M.D.

PS: If you haven’t yet, you can subscribe to my videos for free by clicking here.

Image credit: acadac / Flickr

Stomach Staples or Healthy Kitchen Staples?
Antioxidants: Plant vs. Animal Foods
Cholesterol Lowering in a Nut Shell

Read more: Health, Diet & Nutrition, Eating for Health, Obesity, Videos, , ,

have you shared this story yet?

go ahead, give it a little love

Dr. Michael Greger

A founding member of the American College of Lifestyle Medicine, Michael Greger, M.D., is a physician, author, and internationally recognized speaker on nutrition, food safety, and public health issues. Currently Dr. Greger serves as the Director of Public Health and Animal Agriculture at The Humane Society of the United States. Hundreds of his nutrition videos are freely available at


+ add your own
10:33AM PDT on Mar 13, 2014

thank you

6:21AM PST on Dec 8, 2012

Thank you Dr. Michael Greger, for Sharing this!

11:54AM PDT on Oct 11, 2012

I like nuts, thanks for sharing!

4:42AM PDT on Sep 13, 2012

Read Hulda Regehr Clark's book The Cure of All Diseases and give up nuts!

4:42AM PDT on Sep 13, 2012

Nuts can only make you lose weight in one way: the parasites that live in them emaciate the body.

12:32AM PDT on Sep 4, 2012

Interesting information - a bit skeptical about if it would work though.

8:45PM PDT on Sep 3, 2012

And I like them! Yay! :D

6:59PM PDT on Sep 3, 2012


5:18AM PDT on Sep 3, 2012

yummy foods that are good for you

2:12PM PDT on Sep 2, 2012

Nuts and berries good for us..I love cashews :)

add your comment

Disclaimer: The views expressed above are solely those of the author and may not reflect those of
Care2, Inc., its employees or advertisers.

people are talking

I am glad to find that people are making a true and peaceful effort to let a small area of the world…

Yes Stardutust same with me. Thank you for caring and sharing.

Thank information....very good

"Get away kid you bother me." W.C. Fields

a kitten came to us after we lost our oldest 2 cats;our remaining cat looked at her and bathed her,l…


Select names from your address book   |   Help

We hate spam. We do not sell or share the email addresses you provide.

site feedback


Problem on this page? Briefly let us know what isn't working for you and we'll try to make it right!