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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

How to Treat Dry Eye Disease Naturally with Diet

Michael Greger MD | October 31, 17 at 05:00 AM | Health

Read More: antidepressants, antihistamines, autism, bananas, beans, blindness, bread, breakfast cereal, caffeine, citrus, cruciferous vegetables, dehydration, eye disease, eye health, French fries, fruit juice, grains, greens, herbal remedies, herbal tea, junk food, LASIK, limes, medications, men's health, nuts, potassium, potato chips, processed foods, rice, salt, soy milk, spinach, sugar, surgery, vegetables, vision, vitamin A, vitamin B6, vitamin C, water, women's health

One of the most common eye disorders, dry eye disease, causes irritation or discomfort, and can decrease functional vision, sometimes causing a dramatic deterioration in the quality of life. About five million Americans over age 50 suffer from moderate-to-severe...

Foods to Eat to Help Prevent Diabetes

Michael Greger MD | October 26, 17 at 05:00 AM | Health

Read More: animal products, antioxidants, blood sugar, body fat, bowel movements, breast cancer, cancer, cholesterol, colon disease, colon health, diabetes, estrogen, fatty liver disease, fiber, gut flora, insulin, lipotropes, meat, obesity, phytonutrients, plant-based diets, saturated fat, testosterone, vegans, vegetarians, women's health

Why is meat consumption a risk factor for diabetes? Why does there appear to be a stepwise reduction in diabetes rates as meat consumption drops? Instead of avoiding something in meat, it may be that people are getting something...

Who Should Avoid Coffee?

Michael Greger MD | October 19, 17 at 05:00 AM | Health

Read More: atrial fibrillation, bone fractures, bone health, caffeine, cardiovascular disease, cardiovascular health, chocolate, coffee, dark chocolate, diabetes, energy drinks, epilepsy, GERD, glaucoma, heart disease, heart health, heartburn, incontinence, mortality, safety limits, seizures, sleep, stroke, tea, women's health

Do coffee drinkers live longer than non-coffee drinkers? Is it "wake up and smell the coffee" or don't wake up at all? I discuss these questions in my video, Coffee and Mortality. The largest study ever conducted on diet...

What About Extra Virgin Olive Oil?

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

Read More: antioxidants, beans, butter, cardiovascular disease, cardiovascular health, endothelium, fat, fruit, frying, grains, heart disease, heart health, McDonald's, Mediterranean diet, nuts, oils, olive oil, saturated fat, vegetables, vinegar, walnuts

The relative paralysis of our arteries for hours after eating fast food and cheesecake may also occur after consuming olive oil. Olive oil was found to have the same impairment to endothelial function as high-fat foods like sausage and...

What a Single Fatty Meal Can Do to Our Arteries

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

Read More: angina, animal fat, blood clots, calories, cancer, cardiovascular disease, cardiovascular health, diabetes, endothelium, fat, heart disease, heart health, kidney disease, kidney failure, lactescence, low-fat diets, oils, protein, sugar, vegetable oil, venous thrombosis

The phenomenon of postprandial angina was described more than 200 years ago: chest pain that occurs after a meal, even if you're just sitting down and resting. This could be intuitively attributed to redistribution of blood flow away from...

Chocolate is Finally Put to the Test

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

Read More: beans, bell peppers, beverages, body fat, Brussels sprouts, calories, candy, cardiovascular disease, cardiovascular health, chocolate, cocoa, coffee, dark chocolate, exercise, fruit, grains, heart disease, heart health, industry influence, junk food, legumes, lentils, music, National Confectioners Association, nuts, obesity, phytonutrients, processed food, saturated fat, seeds, split peas, sugar, vegetables, weight gain, weight loss

Botanically speaking, seeds are small embryonic plants--the whole plant stuffed into a tiny seed and surrounded by an outer layer packed with vitamins, minerals, and phytochemicals to protect the seedling plant's DNA from free radicals. No wonder they're so...

Choosing to Have a Normal Blood Pressure

Michael Greger MD | October 5, 17 at 05:00 AM | Health

Read More: blindness, blood pressure, calories, cardiovascular disease, cardiovascular health, Dr. Walter Kempner, evolution, eye disease, eye health, fat, fruit, heart disease, heart health, hypertension, kidney failure, kidney health, medications, mortality, pickled vegetables, plant-based diets, preservation, protein, rice, salt, sodium, stroke, vegans, vegetarians, vision

For the first 90% of our evolution, humans ate diets containing less than a quarter teaspoon of salt a day. Why? Because we ate mostly plants. Since we went millions of years without salt shakers, our bodies evolved into...

Boosting Brown Fat Through Diet

Michael Greger MD | September 26, 17 at 05:00 AM | Health

Read More: arginine, Asia, beans, body fat, brown fat, calories, capsaicin, Caucasian, Cayenne pepper, chili peppers, exercise, fat, ginger, jalapeno, Japan, metabolism, nuts, obesity, pain, pepper, peppers, seeds, soy, spices, spicy food, stomach health, weight loss

Until about ten years ago, brown adipose tissue (BAT) was considered to be biologically active only in babies and small children where it generates heat by burning fat. But now, there is no doubt that active brown fat is...

Brown Fat: Losing Weight Through Thermogenesis

Michael Greger MD | September 21, 17 at 05:00 AM | Health

Read More: blindness, body fat, brown fat, calories, children, CT scan, DNP, exercise, eye disease, eye health, fever, industrial pollutants, industrial toxins, medications, metabolism, obesity, safety limits, side effects, vision, weight loss

During World War I, it was discovered that many of the chemicals for new explosives had toxic or even lethal effects on the workers in the munitions factories. Chemicals such as di-nitro-phenol (DNP) can boost metabolism so much that...

How Doctors Responded to Being Named a Leading Killer

Michael Greger MD | September 19, 17 at 05:00 AM | Health

Read More: alcohol, aspirin, cardiovascular disease, cardiovascular health, Dr. Barbara Starfield, heart disease, heart health, iatrogenic, Institute of Medicine, Lifestyle medicine, medical education, medical ethics, medical profession, medications, mortality, side effects, surgery, Twinkies, women's health

In my video Why Prevention Is Worth a Ton of Cure, I profiled a paper that added up all the deaths caused by medical care in this country, including the hundred thousand deaths from medication side effects, all the...

Does Rye Bread Protect Against Cancer?

Michael Greger MD | September 14, 17 at 05:00 AM | Health

Read More: adolescence, alcohol, berries, bread, breast cancer, breast health, cancer, cancer survival, children, cruciferous vegetables, dairy, fiber, flax seeds, grains, greens, lignans, men's health, milk, prostate cancer, puberty, red wine, rye, sesame seeds, Sweden, tea, vegetables, vegetarians, women's health

Previously, I've explored the beneficial effects of flaxseeds on prostate cancer (Flaxseeds vs. Prostate Cancer), as well as breast cancer prevention and survival (Flaxseeds & Breast Cancer Prevention and Breast Cancer Survival & Lignan Intake). The cancer-fighting effect of...

Fish Consumption and Suicide

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

Read More: alcohol, Alzheimer's disease, animal fat, animal products, antioxidants, autism, beans, brain disease, brain health, dementia, depression, DHA, EPA, Europe, fat, fish, fruit, Greece, Harvard, industrial toxins, Japan, meat, Mediterranean diet, memory, mental health, mercury, mushrooms, nuts, omega-3 fatty acids, persistent organic pollutants, phytonutrients, red wine, seafood, soy, suicide, vegetables, wine

Depression is a serious and common mental disorder responsible for the majority of suicides. As I've covered in Antioxidants & Depression, intake of fruits, vegetables, and naturally occurring antioxidants have been found to be protectively associated with depression. Therefore,...

Can Dehydration Affect Our Mood?

Michael Greger MD | September 7, 17 at 05:00 AM | Health

Read More: brain disease, brain health, cancer, cardiovascular disease, cognition, dehydration, energy, exercise, fatigue, happiness, heart disease, mental health, mood, water

Water is by far the number-one nutrient in our diet. Studies have suggested that proper hydration may lower our risk of heart disease and cancer, and may even make us better kissers. Brushing artificial skin against the lips of...

Heart of Gold: Turmeric vs. Exercise

Michael Greger MD | September 5, 17 at 05:00 AM | Health

Read More: antioxidants, cardiovascular disease, cardiovascular health, curcumin, curry powder, exercise, fruit, heart disease, heart health, Japan, oxidative stress, stroke, supplements, turmeric, vegan, vegetables, vitamin C

The endothelium is the inner lining of our blood vessels. Laid end-to-end, endothelial cells from a single human would wrap more than four times around the world. And it's not just an inert layer; it's highly metabolically active. I've...

How to Design a Misleading Study to Show Diet Doesn't Work

Michael Greger MD | August 29, 17 at 05:00 AM | Health

Read More: Africa, citrus, diverticulitis, Dr. James Linde, fiber, fish, fruit, greens, lemons, meat, mortality, paleolithic diets, plant-based diets, scurvy, vegans, vegetables, vegetarians, vitamin C

A study out of the University of North Carolina found no association between dietary fiber intake and diverticulosis. They compared those who ate the highest amount of fiber, 25 grams, to those who ate the smallest amount, which was...

9 out of 10 That Die From it Never Knew They Even Had This Preventable Disease

Michael Greger MD | August 24, 17 at 05:00 AM | Health

Read More: African Americans, aging, bladder health, colon disease, colon health, diverticulitis, diverticulosis, Dr. Denis Burkitt, Dr. Neil Painter, fiber, grains, intestinal health, meat, mortality, pain, plant-based diets, stool size, sugar, Uganda

Diverticula are out-pouchings of our intestine. Doctors like using a tire analogy: high pressures within the gut can force the intestines to balloon out through weak spots in the intestinal wall like an inner tube poking out through a...

The 3 Vitamins that Prevent Brain Loss

Michael Greger MD | August 22, 17 at 05:00 AM | Health

Read More: aging, Alzheimer's disease, animal protein, b12, bacon, beans, brain disease, brain health, breakfast, cognition, colon health, dementia, eggs, fiber, folate, Framingham Heart Study, greens, gut flora, Harvard, homocysteine, legumes, meat, memory, methionine, mortality, plant-based diets, steak, supplements, vegans, vegetables, vegetarians, vitamin B12, vitamin B6

By our seventies, one in five of us will suffer from cognitive impairment. Within five years, half of those cognitively impaired will progress to dementia and death. The earlier we can slow or stop this process, the better. Although...

Comparing Pollutant Levels Between Different Diets

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

Read More: animal fat, animal products, beef, Boston, breast milk, breastfeeding, California, CHAMACOS study, chicken, children, cognition, dioxins, endocrine disruptors, Europe, fat, feed additives, fish, flame-retardant chemicals, industrial pollutants, industrial toxins, infants, meat, neurotoxins, PBDEs, persistent organic pollutants, plant-based diets, pork, poultry, pregnancy, puberty, safety limits, seafood, thyroid health, turkey, USDA, vegans, vegetarians, women's health

The results of the CHAMACOS (Center for the Health Assessment of Mothers and Children of Salinas) study were published recently. This study of a California birth cohort investigated the relationship between exposure to flame retardant chemical pollutants in pregnancy...

A Dietary Treatment for Irritable Bowel Syndrome

Michael Greger MD | August 15, 17 at 05:00 AM | Health

Read More: alternative medicine, antidepressants, berries, colon disease, colon health, complementary medicine, diabetes, dizziness, gut flora, herbal tea, herbs, irritable bowel syndrome, kidney failure, medications, mint, pain, peppermint, peppermint oil, placebo, placebo effect, Prozac, sexual health, side effects, smoothies, tea

Irritable bowel syndrome (IBS) is a chronic, episodic intestinal disorder characterized by abdominal pain and altered bowel habits. It affects 1 in 7 Americans, although most go undiagnosed. IBS can have a substantial impact on well-being and health, but...