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David Katz, M.D.
David L. Katz, MD, MPH, FACPM, FACP, FACLM is the founding director (1998) of Yale University’s Yale-Griffin Prevention Research Center, and current President of the American College of Lifestyle Medicine.

He earned his BA degree from Dartmouth College (1984); his MD from the Albert Einstein College of Medicine (1988); and his MPH from the Yale University School of Public Health (1993). He completed sequential residency training in Internal Medicine, and Preventive Medicine/Public Health. He is a two-time diplomate of the American Board of Internal Medicine, and a board-certified specialist in Preventive Medicine/Public Health. He has received two Honorary Doctorates.

Dr. Katz has published roughly 200 scientific articles and textbook chapters, and 15 books to date, including multiple editions of leading textbooks in both Preventive Medicine, and nutrition. Recognized globally for expertise in nutrition, weight management and the prevention of chronic disease, he has a social media following of well over half a million.

In 2015, Dr. Katz established the True Health Initiative to help convert what we know about lifestyle as medicine into what we do about it, in the service of adding years to lives and life to years around the globe.

He and his wife, Catherine, founder of, live in Connecticut; they have 5 children.

Entries by David Katz, M.D.

(Cultural) Implications of Biggest Losers' Unfortunate (re)Gains

(1) Comments | Posted May 2, 2016 | 5:49 PM

A feature article in today's New York Times chronicles the unfortunate fate of participants in The Biggest Loser after the spotlights dim, the TV cameras stop speeding, and some time goes by. They regain the weight. Some of it, most of it, all of it, or even...

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For Evil to Prevail

(0) Comments | Posted May 2, 2016 | 11:37 AM

I can't tell if Edmund Burke and I would agree or disagree about most things; the politics and issues of his day were so different from our own, I'm not sure what kind of political animal he would be branded today. In his day, he was labeled...

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Nutrient Supplements in the Land of the Law of Unintended Consequences

(0) Comments | Posted April 28, 2016 | 3:50 PM

In principle, the law that constrains the marketing of nutrient supplements in the U.S. is "DSHEA," or, the Dietary Supplement Health And Education Act (of 1994). In practice, the law of unintended consequences may exert an even greater influence.

I write this in the immediate aftermath of...

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Fixing Epidemic Obesity? We Have Never Tried...

(3) Comments | Posted April 26, 2016 | 4:06 PM

This column isn't about guns or gun control. It's about food, and food for thought, entirely out of control. It's about epidemic obesity, and what passes for deep thinking on the topic. With that proviso out of the way, let's get back to guns.

Our gun control arguments must be...

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Health Care: Of United, and Citizens

(0) Comments | Posted April 22, 2016 | 12:23 PM

The disturbing news item of the past week -- assuming we discount the increasingly routine reports of terrorist bombings, boats packed with desperate migrants capsizing, the global temperature relentlessly rising, and Russian military bombast -- is that the nation's largest health insurer, United Health Care, is withdrawing...

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Chewing the (Dairy) Fat With Dr. Mehmet Oz

(0) Comments | Posted April 21, 2016 | 11:31 AM

I was delighted to join my friend Dr. Oz today to tape a segment for his show about the recent studies of dairy, weight, and diabetes. I believe the exchange Mehmet and I had blenderized our perspectives well, and should prove genuinely informative -- albeit brief, punchy, and,...

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Musical Diets: You Can Dance if You Want to...

(0) Comments | Posted April 18, 2016 | 11:41 AM

We are no strangers to a dizzying array of distorted headlines about diet. But the last couple of weeks took it to a whole new level.

I found myself reflecting on, then laughing at, the image of a world that takes seriously the idea that what we know about the...

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Vegetables, Vegetable Oils and Dairy Fat? Please Don't Eat the Headlines!

(1) Comments | Posted April 14, 2016 | 3:12 PM

One of the particular fringe benefits of what I do is that my interactions almost every week include leading experts in my field from all around the world. Sometimes that's face to face at a conference that convenes a few of us, or on rare and special occasions, assembles

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Diet, Deafness and the Drums of War

(1) Comments | Posted April 6, 2016 | 12:50 PM

A commentary just out in JAMA says many reasonable things about diet and health. The author notes that the overall low quality of the prevailing American diet is an anchor on life expectancy itself. Amen to that. No, multicolored marshmallows are NOT part of a (sane) complete...

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Vegetarianism: Nutrition Science Meets Media Nonsense

(0) Comments | Posted April 5, 2016 | 12:54 PM

We get hyberbolic headlines about nutrition studies almost every week; it's how we roll. We can come back to the reasons why we roll that way, and who profits from it, some other time.

For now, it's enough to note that the global spate of headlines saying things like "

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How Diets Divide Us

(0) Comments | Posted March 31, 2016 | 2:30 PM

Even for someone who spends as much time in the diet war trenches as I do, the barrage of the past week has been noteworthy for its intensity, and its implications -- both exceptionally hopeful, and dire.

The hope, seen by the ubiquitous glow of computer screens if not the...

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The Health Care System: What's in a Name?

(0) Comments | Posted March 29, 2016 | 10:33 AM

The trail that led me to a career in health promotion is relatively more or less selfish, depending on where we begin it.

The rather more selfish version began at age 13. On little more than a whim, I tried out for the junior high school wrestling team, which, not...

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Selling Diets or Telling Truths

(0) Comments | Posted March 22, 2016 | 1:52 PM

The True Health Initiative was created because, and only because, there is one clear way of eating and living that massively promotes the longevity, vitality, and overall health of human beings, and well-being of the planet -- and a global coalition of experts, influencers, and thought leaders believes you...

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What If Exercise Were More Like Healthy Eating?

(0) Comments | Posted March 21, 2016 | 6:22 PM

If exercise were more like healthy eating -- none of us would be doing it.

We would, instead, be perennially parked on the couch, on inevitably flabby backsides, watching experts argue over which is "right" -- hiking or biking? Walking or swimming? Skiing or skating? And so on.


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Paleo Meat Meets Modern Reality

(4) Comments | Posted March 16, 2016 | 3:24 PM

The Oldways Common Ground conference I was privileged to co-chair with Walter Willett last November had no shortage of riveting moments, as the recent posting of conference videos reminds me. But one really stood out.

Boyd Eaton is arguably the founding...

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Truth About Saturated Fat

(1) Comments | Posted March 11, 2016 | 11:03 AM

Folks, hold your horses; I know just what's going on here.

My friendly adherents (thank you; I love you, too) are here for another refreshing installment of "stuff I already knew was right and love to Tweet." My detractors (back at ya', bub) are here knowing in advance they will...

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Where Are the Grown-Ups? (Or: Get Your Unicorn!)

(1) Comments | Posted March 7, 2016 | 10:47 AM

When Donald Trump is President, he will give each of us our very own speckled unicorn.

Actually, I may have made that up, but he might as well have promised it. It would fit right in.

No, I'm not a fan. I'm not into isolationist, racist, misogynistic, bombastic propaganda. But...

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Public Health and Citizens, Truly United

(2) Comments | Posted March 3, 2016 | 3:23 PM

There are just two problems with the prevailing conception of "public health" -- the public, and health. Neither means what we think it means.

For starters, there is no public. The public is an anonymous mass, a statistical conception, nameless, faceless, unknowable, and unlovable. I have made the...

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Taking Public Health to the Moon

(0) Comments | Posted February 26, 2016 | 1:09 PM

I was privileged this week to participate in the Lake Nona Impact Forum, taking the stage with colleagues Dr. Richard Carmona and Dr. Dean Ornish, and joining a cast of notables, such as Dr. David Satcher, and Dr. Sanjay Gupta.

Here, more or less, is what I had to say,...

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Fatness, Affluence, Adaptation and Hope

(1) Comments | Posted February 22, 2016 | 6:53 PM

Colleagues and I recently submitted a grant application to a large foundation, seeking funds to support the True Health Initiative. The funds, should we be fortunate enough to secure them, will accelerate the development of a global communication campaign to convey the evidence and consensus-based fundamentals of...

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