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Michael Greger MD

Michael Greger MD

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A founding member and Fellow of the American College of Lifestyle Medicine, Michael Greger, MD, is a physician, author, and internationally recognized speaker on nutrition, food safety, and public health issues. He has lectured at the Conference on World Affairs, testified before Congress, and was invited as an expert witness in the defense of Oprah Winfrey in the infamous "meat defamation" trial. He is a graduate of Cornell University School of Agriculture and Tufts University School of Medicine. Currently Dr. Greger serves as the Director of Public Health and Animal Agriculture at The Humane Society of the United States. His latest book is How Not to Die. More than a thousand of his nutrition videos are freely available at NutritionFacts.org, with new videos and articles uploaded every day.

Blog Entries by Michael Greger MD

What Do All the Blue Zones Have in Common?

Michael Greger MD | January 17, 17 at 05:00 AM | Health

Read More: alcohol, animal fats, animal products, beans, beer, cancer, cardiovascular disease, dairy, eggs, exercise, fish, french fries, fruit, grains, heart disease, junk food, lifespan, meat, Mediterranean diet, mortality, nuts, olive oil, plant protein, plant-based diets, potato chips, potatoes, PREDIMED, processed foods, seafood, vegans, vegetables, vegetarians

What accounts for the benefits of a Mediterranean-style diet? An anatomy of health effects was published, and the single most important component was the high consumption of plant foods. In contrast, fish and seafood consumption, the only animal foods...

The Two Most Active Ingredients of the Mediterranean Diet

Michael Greger MD | January 12, 17 at 05:00 AM | Health

Read More: alcohol, almonds, Ancel Keys, animal fats, antioxidants, butter, cancer, cardiovascular disease, cardiovascular health, cookies, dairy, DNA damage, eggs, fat, fish, Harvard, Harvard Nurses' Health Study, hazelnuts, heart disease, heart health, lard, lifespan, longevity, meat, Mediterranean diet, mortality, nuts, olive oil, olives, oxidative stress, plant-based diets, PREDIMED, soda, stroke, vegetables, walnuts, wine, World Health Organization

Olives and nuts are plant foods, and as such, are packed with antioxidants, raising the antioxidant level of our bloodstream resulting in lower fat oxidation and free radical DNA damage, but what's happening inside people's arteries? Researchers measured the...

Benefits of Nuts for Stroke Prevention

Michael Greger MD | January 10, 17 at 05:00 AM | Health

Read More: American Heart Association, blood pressure, cardiovascular disease, cholesterol, chronic diseases, dairy, diabetes, fat, fruit, heart disease, hypertension, meat, Mediterranean diet, mortality, nuts, obesity, olive oil, PREDIMED, saturated fat, standard American diet, stroke, vegetables

In the PREDIMED study, from the Spanish "PREvencio ́n con DIeta MEDiterranea," a whopping 7,447 patients were randomized into three groups. These were folks at high risk for a heart attack, about half were obese, diabetic and most had...

The Mediterranean Diet or a Whole Food Plant-Based Diet?

Michael Greger MD | January 3, 17 at 05:00 AM | Health

Read More: alcohol, American Heart Association, brain disease, bread, butter, cancer, canola, cardiovascular disease, cholesterol, chronic diseases, dairy, Dr. Caldwell Esselstyn, Dr. Dean Ornish, exercise, fish, fruit, Greece, heart disease, Lyon Diet Heart Study, meat, Mediterranean diet, mortality, nuts, olive oil, omega-3 fatty acids, plant-based diets, PREDIMED, saturated fat, smoking, walnuts, wine

Recent studies have shown that higher Mediterranean diet adherence scores are associated with a significant reduction of the risk of death, heart disease, cancer, and brain disease. The problem with population studies like these is that people who eat...

Dr. Greger's New DVD Now Streaming

Michael Greger MD | December 29, 16 at 11:30 AM | Health

Read More: DVD, NutritionFacts.org, updates

Thank you for your incredible support! We blew the top off of our donation drive carrot in less than a week! Thank you for your flood of encouragement. It's such an honor to be able to dedicate my life...

What's the Mediterranean Diet's Secret?

Michael Greger MD | December 22, 16 at 05:00 AM | Health

Read More: Ancel Keys, animal fat, animal products, beans, brain health, cancer, cardiovascular disease, chronic diseases, cognition, cruciferous vegetables, dairy, depression, diabetes, fruit, grains, Greece, greens, heart disease, inflammation, iron, meat, Mediterranean diet, mental health, mortality, nuts, phytonutrients, plant-based diets, soy, standard American diet, stroke, vegans, vegetables, vegetarians

The Mediterranean Diet is an "in" topic nowadays in both the medical literature and the lay media. As one researcher put it, "Uncritical laudatory coverage is common, but specifics are hard to come by: What is it? Where did...

Striving for Alkaline Pee and Acidic Poo

Michael Greger MD | December 20, 16 at 05:00 AM | Health

Read More: acid/base balance, Africa, African Americans, animal protein, beans, bowel movements, cabbage, colon cancer, colon health, fecal bacteria, fiber, fruit, grains, gut flora, pH, plant-based diets, sauerkraut, standard American diet, vegans, vegetables, vegetarians, vinegar

More than 30 years ago, an idea was put forward that high colonic pH promoted colorectal cancer. A high colonic pH may promote the creation of carcinogens from bile acids, a process that is inhibited once you get below...

How to Prevent Ulcerative Colitis with Diet

Michael Greger MD | December 15, 16 at 05:00 AM | Health

Read More: animal protein, butyrate, colon health, Crohn's disease, DNA damage, fecal bacteria, fiber, flatulence, gut flora, hydrogen sulfide, inflammatory bowel disease, intestinal health, Japan, meat, plant protein, plant-based diets, steak, ulcerative colitis, vegans, vegetarians

What has driven the dramatic increase in prevalence of the inflammatory bowel disease Crohn's disease in societies that rapidly westernized--a disease practically unknown just a century ago? What has changed in our internal and external environment that has led...

What's the Optimal Cholesterol Level?

Michael Greger MD | December 13, 16 at 05:00 AM | Health

Read More: blood pressure, cardiovascular disease, cholesterol, chronic diseases, diabetes, dietary guidelines, Dr. William Clifford Roberts, exercise, fruit, heart disease, hypertension, LDL cholesterol, obesity, smoking, statins, vegetables

No matter where we live, how old we are or what we look like, health researchers from the Institute of Circulatory and Respiratory Health have discovered that 90% of the chance of having a first heart attack "can be...

Reducing Glycotoxin Intake to Help Reduce Brain Loss

Michael Greger MD | December 8, 16 at 05:00 AM | Health

Read More: Advanced Glycation End-products, aging, Alzheimer's disease, Australia, beef, brain disease, brain health, chicken, cognition, dementia, fish, glycotoxins, histones, lifespan, longevity, mental health, nerve health, pork, sirtuins, vegans, vegetarians

Each of us has about six billion miles of DNA. How does our body keep it from getting all tangled up? There are special proteins called histones, which act like spools with DNA as the thread. Enzymes called sirtuins...

Why Some Like Cilantro and Others Hate It

Michael Greger MD | December 6, 16 at 05:00 AM | Health

Read More: alternative medicine, animal studies, antioxidants, anxiety, arthritis, cilantro, coriander, gout, herbal remedies, inflammation, joint health, mental health, osteoarthritis, salsa, spices, steroids, sunburn, taste buds, uric acid

One sign of changing U.S. demographics is that salsa has replaced ketchup as America's #1 table condiment. One of the popular salsa ingredients is cilantro, described as one of the "most polarizing and divisive food ingredients known." Some people...

Improving Employee Diets Could Save Companies Millions

Michael Greger MD | December 1, 16 at 05:00 AM | Health

Read More: alcohol, animal products, animal protein, beans, blood sugar, body fat, broccoli, calories, cholesterol, chronic diseases, dairy, diabetes, eggs, exercise, fat, fiber, fruit, grains, industry influence, insulin, Lifestyle medicine, meat, metabolism, obesity, plant-based diets, prediabetes, saturated fat, tobacco, vegans, vegetables, vegetarians, weight loss, Workplace intervention

The food, alcohol, and tobacco industries have been blamed for "manufacturing epidemics" of chronic disease, but they're just trying to sell more product like everyone else. And so if that means distorting science, creating front groups, compromising scientists, blocking...

Get a 2017 Daily Dozen Recipe Calendar

Michael Greger MD | November 29, 16 at 05:00 AM | Health

Read More: updates

Today is #GivingTuesday, kicking off the charitable season with a celebration of giving and philanthropy. To commemorate it this year, we've created a 2017 Daily Dozen Recipe Calendar, with each month featuring a Green-Light recipe submitted by one of...

Lipotoxicity: How Saturated Fat Raises Blood Sugar

Michael Greger MD | November 24, 16 at 05:00 AM | Health

Read More: animal fat, autoimmune diseases, avocados, blood sugar, cancer, cardiovascular disease, carnitine palmitoyl transferase, ceramide, chronic diseases, dairy, diabetes, diacylglycerol, eggs, fat, fruit, heart disease, hydrogenated fats, inflammation, insulin, lipotoxicity, meat, milk, monounsaturated fats, mortality, muscle health, nuts, olives, omnivores, oxidative stress, pancreas health, plant-based diets, prediabetes, saturated fat, trans fats, vegans, vegetable oil, vegetarians, weight loss

The reason those eating plant-based diets have less fat buildup in their muscle cells and less insulin resistance may be because saturated fats appear to impair blood sugar control the most. The association between fat and insulin resistance is...

How a Low-Carb Diet is Metabolically Like Being Obese

Michael Greger MD | November 22, 16 at 05:00 AM | Health

Read More: bacon, blood sugar, butter, calories, diabetes, fat, insulin, low-carb diets, obesity, oxidative stress, prediabetes, spillover effect, sugar, trigylcerides, weight loss

Free fatty acids (meaning fat circulating in the bloodstream not packaged into triglycerides) result in inflammation, toxic fat breakdown products, and oxidative stress, which can gum up the insulin receptor pathway and lead to insulin resistance in our muscles....

Fat is the Cause of Type 2 Diabetes

Michael Greger MD | November 17, 16 at 05:00 AM | Health

Read More: athletes, blood sugar, diabetes, fat, insulin, lipotoxicity, low-carb diets, muscle health, pancreas health, prediabetes, saturated fat, sports medicine, suga

Studies dating back nearly a century noted a striking finding: If you take young, healthy people and split them up into two groups--half on a fat-rich diet and half on a carbohydrate-rich diet--we find that within just two days,...

The Natural Human Diet

Michael Greger MD | November 15, 16 at 05:00 AM | Health

Read More: Africa, bacon, blood pressure, brains, butter, cancer, cardiovascular disease, cheese, chicken, China, cholesterol, chronic diseases, diabetes, Dr. Caldwell Esselstyn, Dr. Dean Ornish, eggs, evolution, fiber, fruit, greens, heart disease, high blood pressure, hypertension, low-carb diets, meat, Mioscene, nutrition myths, nuts, paleolithic diets, plant-based diets, pork, prehistoric diets, Pritikin, seeds, stroke, trans fats, Twinkies, vegetables

Our epidemics of dietary disease have prompted a great deal of research into what humans are meant to eat for optimal health. In 1985, an influential article highlighted in my video The Problem With the Paleo Diet Argument was...

Medical Care: The Third Leading Cause of Death

Michael Greger MD | November 10, 16 at 05:00 AM | Health

Read More: cancer, cardiovascular disease, cholesterol, chronic diseases, hand washing, heart disease, iatrogenic, lifespan, Lifestyle medicine, medical education, medical profession, medications, mortality, penis health, side effects, statins, surgery

An ounce of prevention is worth a pound of cure, but a pound isn't that heavy. Why change our diet and lifestyle when we can just wait and let modern medicine fix us up? In my video The Actual...

How Well Do Cholesterol-Lowering Drugs Actually Work?

Michael Greger MD | November 8, 16 at 05:00 AM | Health

Read More: bone fractures, breast cancer, cancer, cardiovascular disease, cardiovascular health, cholesterol, colon cancer, Dr. Dean Ornish, exercise, Fosamax, heart disease, heart health, Lifestyle medicine, Lipitor, medical education, medications, meditation, plant-based diets, side effects, statins, stress

One of the reasons people may undervalue diet and lifestyle changes is an overconfidence in the ability of pills and procedures to prevent disease. For example, people tend to wildly overestimate the power of things like mammograms and colonoscopies...

Flax Seeds Can Have Profound Effect on Hypertension

Michael Greger MD | November 1, 16 at 05:00 AM | Health

Read More: aging, animal fat, antioxidants, blood pressure, burgers, cancer, cardiovascular disease, cardiovascular health, cholesterol, fat, flax seeds, hamburgers, heart disease, heart health, hypertension, lard, meat, medications, molasses, mortality, phytonutrients, plant-based diets, salt, saturated fat, side effects, statins, stroke, sugar, tomatoes

A recent article in the journal, Meat Science, acknowledged that a sector of the population perceives meat as a food that is detrimental to their health because of studies associating meat consumption with heart disease and cancer. So, the...