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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, with new videos and articles uploaded every day.

Blog Entries by Michael Greger MD

The Dietary Link Between Acne and Cancer

Michael Greger MD | January 7, 16 at 05:00 AM | Health

Read More: acne, adolescence, Alzheimer's disease, animal products, breast cancer, cancer, cardiovascular disease, cardiovascular health, chronic diseases, dairy, diabetes, eggs, erectile dysfunction, fruit, heart disease, heart health, hormones, infants, Japan, junk food, meat, milk, obesity, plant-based diets, prediabetes, premature puberty, processed foods, puberty, skin health, standard American diet, TOR, vegetables

Acne is an epidemic skin disease of industrialized countries, reaching prevalence rates of over 85 percent of teenagers. In nearly half of American men and women, acne even continues after adolescence and into the third decade of life. Acne...

How to Suppress the Aging Enzyme TOR

Michael Greger MD | January 5, 16 at 05:00 AM | Health

Read More: aging, animal protein, blueberries, breast cancer, broccoli, caloric restriction, cancer, cruciferous vegetables, cucumbers, dairy, endocrine disruptors, fruit, grapes, green tea, hormones, infants, Kaposi's sarcoma, kidney health, lifespan, mango, milk, mortality, onions, plant-based diets, prostate cancer, rapamycin, soy, spices, strawberries, TOR, turmeric, vegetables

Over the last decade, more than 5,000 papers have been published about TOR, an engine-of-aging enzyme inhibited by the drug rapamycin. (What is TOR? Check out my videos Why Do We Age? and Caloric Restriction vs. Animal Protein Restriction.)...

Free App for Android and iPhone and Top 10 Videos of 2015

Michael Greger MD | December 31, 15 at 05:00 AM | Health

The second half of my new book (and New York Times Bestseller for the third week in a row--I'm still pinching myself!), How Not to Die, revolves around my Daily Dozen, a checklist of all the things I try...

Starch-Blocking Foods for Diabetics?

Michael Greger MD | December 29, 15 at 05:00 AM | Health

Read More: acarbose, alternative medicine, American Diabetes Association, amylase, arsenic, beans, black beans, blood sugar, Canada, chickpeas, colon health, complementary medicine, diabetes, dietary guidelines, Europe, grains, green beans, insulin, kidney beans, legumes, Lifestyle medicine, liver disease, liver health, medications, peanuts, peas, pinto beans, Precose, prediabetes, rice, side effects, soybeans, vegetables

How did doctors treat diabetes before insulin? Almost a thousand medicinal plants are known antidiabetic agents, including beans, most of which have been used in traditional medicine. Of course, just because something has been used for centuries doesn't mean...

Which Works Better: Adding Beans or Portion Control?

Michael Greger MD | December 24, 15 at 05:00 AM | Health

Read More: abdominal fat, beans, blood pressure, blood sugar, caloric restriction, calories, chickpeas, diabetes, legumes, lentils, metabolic syndrome, navy beans, obesity, peas, prediabetes, split peas

People who eat the most legumes appear to only have a fraction of the risk for a type of prediabetes known as metabolic syndrome. Legumes are beans, split peas, chickpeas, and lentils. In one studyout of Iran, people who...

Which Nut Suppresses Cancer Cell Growth the Most?

Michael Greger MD | December 22, 15 at 05:00 AM | Health

Read More: almonds, antioxidants, beans, brazil nuts, breast cancer, broccoli, cancer, cashews, colon cancer, corn, cranberries, fibrocystic breast disease, fruits, garlic, Harvard Nurses' Health Study, hazelnuts, lemons, lentils, liver cancer, macadamia nuts, mortality, nuts, oranges, oxidative stress, pancreatic cancer, peanut butter, peanuts, pecans, pine nuts, pistachios, soybeans, vegetables, vitamin C, walnut oil, walnuts

People who eat nuts in their adolescence may have a better chance of fighting off breast cancer later in life, according to data from the Harvard Nurse's Study. A follow-up study involving the daughters of the nurses corroborated the...

Making Plant-Based Diets the New Normal

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

Read More: alternative medicine, blood pressure, blood sugar, cancer, cardiovascular disease, cardiovascular health, cholesterol, chronic diseases, complementary medicine, dairy, diabetes, eggs, exercise, heart disease, heart health, junk food, Kaiser Permanente, LDL cholesterol, Lifestyle medicine, meat, medications, obesity, plant-based diets, prediabetes, processed foods, rheumatoid arthritis

A Nutritional Update for Physicians was published in the official journal of Kaiser Permanente, the largest managed care organization in the United States. It told physicians that healthy eating may best be achieved with a plant-based diet, defined as...

Coffee for Hepatitis C

Michael Greger MD | December 10, 15 at 05:00 AM | Health

Read More: addiction, alcohol, caffeine, coffee, DNA damage, Europe, fatigue, fatty liver disease, headaches, hepatitis, liver cancer, liver disease, liver health, liver inflammation, mood, mortality, Norway, obesity

Decades ago, researchers in Norway came upon an unexpected finding. Alcohol consumption was associated with liver inflammation (no surprise), but a protective association was found for coffee consumption. These findings were replicated in the U.S. and around the world....

There Was No Book... Until Now!

Michael Greger MD | December 8, 15 at 05:00 AM | Health

Read More: book, How Not to Die

People are more likely to die during December and January than any other time of the year. Fitting, then, that my new book How Not to Die hits stores today! If you missed it yesterday, I created a video tourthrough...

Dr. Greger Takes on Vitamin C for Cancer in New DVD

Michael Greger MD | December 3, 15 at 05:00 AM | Health

Read More: DVD

Vitamin C is no stranger to controversy. It took 40 years between when citrus fruits were shown to cure scurvy in the 1700's and their widespread application. Is it possible we're in the midst of a similar 40 year...

Do Dietary Toxins Contribute to Hand Tremors?

Michael Greger MD | November 30, 15 at 05:00 AM | Health

Read More: addiction, beef, beta-carboline alkaloids, brain disease, brain health, cancer, chicken, coffee, cognition, detoxification, essential tremor, fish, frying, Harmane, heterocyclic amines, liver, liver disease, liver health, lung cancer, meat, MPTP, neurotoxins, paralysis, Parkinson's disease, pork, poultry, reindeer meat, salmon, smoking, tobacco, tremors, turkey

Essential tremor, affecting 1 in 25 adults over 40 and up to 1 in 5 of those in their 90s, is one of the most common neurological diseases. In addition to the potentially debilitating hand tremor, there can be...

How Learning to Cook Can Save Your Life

Michael Greger MD | November 26, 15 at 05:00 AM | Health

Read More: boiling, breakfast, chicken, cholesterol, chronic diseases, cooking methods, diabetes, dietary guidelines, fast food, fiber, industry influence, junk food, LDL cholesterol, mortality, obesity, pizza, poultry, processed foods, saturated fat, sodium, standard American diet, supermarkets, Taiwan, turkey, United Kingdom, vegetables, World Health Organization

The eating habits of modern Americans have been described as, "eating breakfast in their cars, lunch at their desks and chicken from a bucket." Within the last few decades, Americans are eating out more and more, and cooking fewer...

Is it Better to Bake, Boil, or Steam Sweet Potatoes?

Michael Greger MD | November 24, 15 at 05:00 AM | Health

Read More: acrylamide, antioxidants, baking, beta carotene, bioavailability, blood sugar, blueberries, boiling, cancer, carcinogens, carrots, cooking methods, frying, glycemic index, infants, oxidative stress, roasting, steaming, sweet potatoes, vitamin A, yams

I previously talked about the cancer fighting properties of sweet potatoes (See Anti-Cancer Potential of Sweet Potato Proteins) and what would happen if you centered your diet around them (The Okinawa Diet: Living to 100). It seems that the...

Sweet Potato Proteins vs. Cancer

Michael Greger MD | November 19, 15 at 05:00 AM | Health

Read More: affordability, cancer, cervical cancer, chemotherapy, colon cancer, cost savings, gallbladder disease, gallbladder health, greens, leukemia, mortality, mouth cancer, NASA, potatoes, protein, sweet potatoes, tongue cancer, vegetables, yams

Sweet potatoes can be considered a superfood. They are one of the healthiest and cheapest vegetables on the planet. (And one day, perhaps, even off the planet, as NASA has chosen the sweet potato for space missions.) A study...

How to get signed, personalized copies of How Not to Die

Michael Greger MD | November 17, 15 at 05:28 AM | Health

Read More: How Not to Die

To encourage as many pre-orders as possible, I will sign and personalize How Not to Die for anyone pre-ordering five or more copies any time before the launch date on December 8, 2015. If you've already pre-ordered five or...

Where are the Lowest Rates of Alzheimer's in the World?

Michael Greger MD | November 12, 15 at 05:00 AM | Health

Read More: Africa, African-American, Alzheimer's disease, animal fat, animal products, Asia, beans, cholesterol, dementia, Europe, grains, India, iron, LDL cholesterol, low-carb diets, meat, Nigeria, plant-based diets, rice, saturated fat, standard American diet, vegans, vegetables, vegetarians

The rates of dementia differ greatly around the world, from the lowest rates in Africa, India, and South Asia, to the highest rates in Western Europe and especially North America. Is it all just genetics? Well, the incidence of...

Coca-Cola Stopped Sponsoring the Academy of Nutrition and Dietetics

Michael Greger MD | November 10, 15 at 05:00 AM | Health

Read More: Academy of Nutrition and Dietetics, alcohol, American Academy of Pediatrics, American Dietetics Association, American Egg Board, animal studies, candy, chewing gum, chocolate, Coca-Cola, cocoa, dairy, eggs, fast food, Hershey's, industry influence, junk food, McDonald's, meat, Pepsi, smoking, soda, tobacco

The American Dietetic Association (ADA) is the world's largest association of nutrition professionals. They claim to be devoted to "improving the nation's health." They promote a series of Nutrition Fact Sheets. Who writes them? Industry sources pay $20,000 per...

How Dark Chocolate Affects Our Arteries

Michael Greger MD | November 5, 15 at 05:00 AM | Health

Read More: angiogram, antioxidants, calories, cardiovascular disease, cardiovascular health, chocolate, chronic diseases, cocoa, dairy, dark chocolate, Dutched cocoa, fat, heart disease, heart health, Hershey's, industry influence, milk, milk chocolate, mortality, oxidative stress, phytonutrients, soda, sugar

Chocolate: delicious beauty or harmful beast? Or both? Although chocolate products can contain high levels of fat and sugar, the cocoa powder itself may have beneficial effects in a number of chronic disease conditions including heart disease. Flow-mediated dilation,...

How Do Broccoli Supplements Compare to Sprouts?

Michael Greger MD | November 3, 15 at 05:00 AM | Health

Read More: antioxidants, broccoli, broccoli sprouts, Broccomax, cancer, cancer stem cells, cost savings, diabetes, inflammation, oxidative stress, phytonutrients, prediabetes, sprouts, sulforaphane, supplements

Your parents would have been smart to tell you to to "eat your broccoli." But what about broccoli sprouts? Or broccoli supplements? There have been a number of randomized, double-blind, placebo-controlled clinical trials on the use of broccoli sprouts...

Why Some Dietary Cholesterol Studies Fail to Show Harm

Michael Greger MD | October 29, 15 at 05:00 AM | Health

Read More: alcohol, alternative medicine, cancer, cardiovascular disease, cardiovascular health, cholesterol, complementary medicine, diabetes, dietary guidelines, eggs, Framingham Heart Study, heart disease, heart health, LDL cholesterol, Lifestyle medicine, lung cancer, prediabetes, saturated fat, smoking, standard American diet

How else can we make decisions for ourselves and our families but by the best available balance of evidence? The latest meta-analysis, pooling data from more than a dozen studies involving more than 300,000 people, indicates that there is...