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David Katz, M.D.
David L. Katz, MD, MPH, FACPM, FACP is the founding director of Yale University’s Prevention Research Center; President of the American College of Lifestyle Medicine; Editor-in-Chief of the journal, Childhood Obesity; Chief Science Officer for NuVal LLC; and director of the Integrative Medicine Center at Griffin Hospital. A clinician, researcher, author, inventor, journalist, and media personality, Dr. Katz is the recipient of numerous awards and recognitions, including an honorary doctoral degree; widely supported nominations for the position of U.S. Surgeon General; recognition by as one of the 100 most influential people in health and fitness in the world for the past 3 years; and inclusion by LinkedIN as one of the original 150 INfluencers. He has authored over 200 scientific papers and chapters, 15 books, and well over 1,000 columns and blogs- with a resulting social media following of roughly 500,000. A two-time diplomate of the American Board of Internal Medicine, and a board-certified specialist in Preventive Medicine/Public Health, he is recognized globally for expertise in nutrition, weight management and the prevention of chronic disease.

Dr. Katz has delivered addresses in numerous countries on four continents, and has been acclaimed by colleagues as the “poet laureate” of health promotion.

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

Entries by David Katz, M.D.

Sugar and Saturated Fat: Feeding the Parasites of Science

(2) Comments | Posted October 1, 2015 | 10:39 AM

First things first: science does not deal in absolutes (I suppose "absolute zero" may be an exception, but frankly, probably not). Famously, everything is relative. Even relativity. Einstein's groundbreaking theory has been subject to on-going revisions in the minds and machinations of his successors ever since he...

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An Open Letter to the BMJ Regarding US Dietary Guidance

(4) Comments | Posted September 25, 2015 | 10:14 AM

Dear Editors:

I am rather stunned that the BMJ published a journalist's commentary about the work of the 2015 United States Dietary Guidelines Advisory Committee as if it were an authoritative rebuttal. It's as if someone selling horse paperweights is invited to critique the...

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Raising Safer Daughters; Raising Better Sons

(0) Comments | Posted September 24, 2015 | 10:52 AM

Earlier this week, a report ran in the New York Times telling us that one out of every four young women in college, including the most illustrious of our colleges, experiences some kind of sexual assault. The actual numbers reported suggested that on quite a few campuses,...

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Need, Greed, and GMOs: Genuflection in All the Wrong Directions

(3) Comments | Posted September 22, 2015 | 4:12 PM

Images of scientists inserting eye-of-newt genes into escarole, or wool-of-bat genes into watercress stalk the nightmares of pure food proponents, and up to a point-- rightly so. Even if the intentions of those tinkering with foods are good- such as putting antifreeze genes from amphibians into oranges so they...

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Doctors, Death and Dignity: The Semantics of 'Suicide'

(3) Comments | Posted September 18, 2015 | 10:21 AM

Inevitably, death comes to be seen as the enemy in medical care. A resuscitation effort ends with success, or death. Death is the antithesis of triumph in medicine. It is where options run out, where treatments end, where the final desperations of hope surrender. It is failure.

Nor are we...

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Breast Cancer Screening: Of Chances and Choices

(0) Comments | Posted September 11, 2015 | 10:01 AM

A sardonic insight by Bertrand Russell deftly, if disturbingly, conveys much of what is wrong in the realm of modern health promotion, particularly where diet is concerned: "The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people...

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On and Beyond the Ethics of (Animals) Eating Animals

(1) Comments | Posted September 9, 2015 | 4:46 PM

My intent, as advertised, is to reflect on the ethics of animals, including our own variety, eating other animals. My further intent is to ruminate on the practical ramifications of the pertinent choices we make as the planet's supreme apex omnivore, which I will argue reside substantially beyond the dominion...

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Dietary Fat and the Human Brain: Redefining Food for Thought

(1) Comments | Posted September 4, 2015 | 11:35 AM

The Labor Day weekend brings into sharp juxtaposition two irrepressible, seasonal forces: one is the culturally-sanctioned indulgence in an end-of-summer barbecue blitzkrieg, and the other is the return of our kids to the daily disciplines of a school day. We might add a return to more generally frenetic demands on...

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Healing and Human Touch

(0) Comments | Posted August 26, 2015 | 11:58 AM

Early this summer, I spent several days in a hospital bed, tethered to an IV, with what proved in retrospect to be anaplasmosis (a nasty bit of tick-borne business), complicated by viral meningitis. The latter was likely due to the immunosuppression of the primary infection....

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Industry-Funded Research: Conflict or Confluence?

(1) Comments | Posted August 20, 2015 | 1:55 PM

The great public health imbroglio disclosed over recent weeks, in which widely, highly-regarded scientists were found to be running on Coca-Cola funding to enlighten the world about calories and energy balance, continues to reverberate through all forms of media. You have no doubt encountered a bounty of...

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Chewing the Fat, Again

(4) Comments | Posted August 18, 2015 | 10:24 AM

Among my numerous colleagues, friends, and correspondents are more than a few who circulate every abstract, however obscure the source, suggesting that saturated fat has been fully exonerated, or that everything we ever thought we knew about dietary fat, health, and weight has been utterly...

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The Smart, Scary Thing About Dummies

(0) Comments | Posted August 16, 2015 | 11:54 AM

My wife and I were watching America's Got Talent the other night, and I must concede: America has, indeed, got talent. As does the world at large, since great acts were not necessarily home grown.

Among the standout performances was one that particularly surprised me. In general,...

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Coca-Cola, Calories, and Conflicts of Interest

(1) Comments | Posted August 11, 2015 | 12:11 PM

If space in the title bar allowed, I would have extended the above, with this addendum following the colon: The Case for Differentiating the Dots. We will come to dots, and differentiation, presently. For now, our tale begins with coverage in today's New York Times about the perspicacious suspicions...

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Why Success Is Always 'Iffy'

(0) Comments | Posted July 28, 2015 | 10:12 AM


I would love to identify some cadre of constantly buoyant motivational speakers, or perennially jocular optimists as my trusted arbiters of success. I would love to, but alas, I just can't. I seem constitutionally prone to go blind while wearing...

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One Minute Longer

(2) Comments | Posted July 24, 2015 | 9:54 AM

One of my favorite books as a child was called, if memory serves, Favorite Dog Stories. I rather doubt the collection had much genuine literary merit. But I was a kid and very much loved my dog then, as I love my dogs now -- and I loved the stories...

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Zeal, Veal and Veganism

(2) Comments | Posted July 20, 2015 | 4:12 PM

When my vegan friends and colleagues say that a vegan diet is categorically the best for human health, it is an excess of zeal. We simply do not have evidence to substantiate the claim. I know; I've looked- hard.

If you are inclined to...

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Health Care Rationing: The Roar and the Silence

(3) Comments | Posted July 17, 2015 | 11:52 AM

I have gotten the impression over my years in medicine that essentially no one likes to talk about rationing care. Those who oppose the concept on ideological grounds certainly don't want to talk about it. Those who are in acute need of care for themselves or someone they love are...

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Ending the Big, Fat Debate

(1) Comments | Posted July 15, 2015 | 6:22 PM

Achieving a clear understanding of the health effects of dietary fats requires a challenging slog through a thick tangle of opinions. These days, it's rare to get through any given news cycle without contentions about dietary fat, expert and otherwise, coming at us from every quarter. The preoccupation, especially intense...

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Eating in Echo Chambers

(0) Comments | Posted July 9, 2015 | 1:59 PM

In Going to Extremes, Cass Sunstein explores and characterizes the process that can lead to religious fundamentalism, internecine hatreds, jihad, and suicide terrorism. The essential ingredient is an echo chamber, a place where the opinion to which you are natively inclined, for whatever reasons, is reflected back...

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Cancer Mortality News, Between the Lines

(0) Comments | Posted July 6, 2015 | 4:13 PM

A CDC report just released indicates that the age-adjusted risk of cancer death is declining for Americans overall, and the trajectory is largely in line with the aspirational objectives of Healthy People 2020. There are several, salient messages in this report- and at least...

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