Dr. Greger's Videos on Weight Loss

How to achieve weight loss healthily. Learn more in our easy-to-understand videos on the latest research.

The largest study ever to compare the obesity rates of those eating plant-based diets was published in North America. Meat eaters topped the charts with an average body mass index (BMI) of 28.8—close to being obese. Flexitarians (people who ate meat more on a weekly basis rather than daily) did better at a BMI of 27.3, but were still overweight. With a BMI of 26.3, pesco-vegetarians (people who avoid all meat except fish) did better still. Even U.S. vegetarians tend to be marginally overweight, coming in at 25.7. The only dietary group found to be of ideal weight were those eating strictly plant-based (the “vegans”), whose BMI averaged 23.6.

People who had once eaten vegetarian diets but then started to consume meat at least once a week were found in one study to experience a 146 percent increase in odds of heart disease, a 152 percent increase in stroke, a 166 percent increase in diabetes, and a 231 percent increase in odds for weight gain.

But vegetarians may suffer high rates of chronic disease if they eat a lot of processed foods. Take India, for example, where rates of diabetes, heart disease, obesity, and stroke have increased far faster than might have been expected given its relatively small increase in per-capita meat consumption. This has been blamed in part on the apparent shift from brown rice to white and substitution of other refined carbohydrates, packaged snacks, and fast-food products for India’s traditional staples of lentils, fruits, vegetables, whole grains, nuts, and seeds.

The dividing line between weight loss-promoting, health-promoting, and disease-promoting foods may be less plant- versus animal-sourced foods and more whole plant foods versus most everything else.

A dietary quality index was developed that simply reflects the percentage of calories people derive from nutrient-rich, unprocessed plant foods on a scale of 0 to 100. The higher the score, the more body fat may be lost over time and the lower the risk may be of abdominal obesity, high blood pressure, high cholesterol, and high triglycerides. The standard American diet was found to rate 11 out of 100. According to U.S. Department of Agriculture estimates, 32 percent of our calories comes from animal foods, 57 percent from processed plant foods, and only 11 percent from whole grains, beans, fruits, vegetables, and nuts. That means on a scale of one to ten, the American diet would rate about a one.

For more in-depth data on this topic, check out Dr. Greger’s book, How Not to Diet. It hones in on the optimal criteria to enable weight loss while considering how these foods actually affect our health and longevity.

For substantiation of any statements of fact from the peer-reviewed medical literature, please see the associated videos below.

312 videos

All Videos for Weight Loss

How to Preserve Your Sense of Smell

Loss of sense of smell can have serious consequences.

The Secret to Weight Loss Through Exercise

Exercise ramps up appetite, helping to explain why calories burned don’t necessarily equal calories lost, so how can we lose weight through physical activity?

The Exercise “Myth” for Weight Loss

Why is it so hard to outrun a bad diet?

Licorice root ground up in a bowl on a dark surface

How Much Licorice Is Safe?

Eating licorice or drinking licorice tea can cause the loss of body fat by blocking the effects of a stress hormone, but at what cost?

Clock on a plate with knife and fork next to

Diet and Caloric Restriction for Longevity—The Monkey Trials

How can we make sense of the disparate results from the four primate studies on caloric restriction and lifespan?

$Scientific illustration of x ray with red highlight over fracture$

Acid Reflux Medicine May Cause Osteoporosis

Stomach acid–blocking proton pump inhibitor drugs—PPIs with brand names like Prilosec, Prevacid, Nexium, Protonix, and AcipHex—appear to significantly increase the risk of bone fractures.

The Risks and Benefits of Mindfulness for Weight Loss

Contrary to popular perception, the evidence for even the most well-founded benefits of mindfulness meditation is not entirely conclusive.

Mindful Eating vs. Cognitive Defusion for Food Cravings

Of all the mindfulness skills, cognitive defusion appears to be the most effective, simple, and efficient approach to manage food cravings.

Arrangement of vegetables and fruits in a sunny environment

Which Foods Are the Most Anti-Angiogenic?

For cancer prevention, researchers suggest “constant consumption” of anti-angiogenic foods.

Targeting Angiogenesis to Lose Weight

Expanding body fat releases blood supply-generating factors that may end up hooking up tumors, too.

Plates with meals including plant-based patties

Are Beyond Meat Plant-Based Meat Alternatives Healthy?

The SWAP-MEAT study puts Beyond Meat products to the test.

Person in a white shirt holding their stomach

Fecal Transplants for Aging and Weight Loss

Does poop from centenarians have anti-aging properties?

Assortment of whole food plant-based foods

Fasting to Detox

How might we help flush the pollutants stored in our fat that come spilling out into our bloodstream during weight loss?

How Hot Peppers May Extend Your Life

Spice can hack your brain by making foods taste saltier.

Better to Exercise Before or After Meals for Weight Loss and Blood Sugar Control?

If people burn more fat on the days they exercise before eating, rather than afterwards, why doesn’t this translate into more weight loss?

Older male kneeling down to tie sneakers

The Best Time to Exercise for Weight Loss

Burn off significantly more body fat exercising before meals, rather than after them.

Improving VO2 Max: A Look at Vegetarian and Vegan Athletes

Plant-based diets improve the performance of athletes and nonathletes alike.

Glass of steeping hibiscus tea and loose leaf laying around

Fat-Blocking Benefits of Hibiscus Tea

What did a randomized, double-blind, placebo-controlled trial of hibiscus tea for weight loss find?

Plant-Based Diet for Treating and Reversing Stage 3 Kidney Disease

I share a touching story of the power of plant-based eating for chronic kidney failure.

A Case of Stage 3 Cancer Reversal with Fasting

I go over a case report of water-only fasting, followed by a whole food, plant-based diet for follicular lymphoma.

Is Swimming Good for Weight Loss?

Exercising in cool water or under cool conditions on land can lead to an increase in post-workout calorie intake.

Round bowl of beans, greens, and other whole foods on a white surface

The Impacts of Plant-Based Diets on Breast Cancer and Prostate Cancer

Why do people who eat more plants get less breast and prostate cancer?

Gloved hand doing a finger prick on another person’s hand

Vinegar for Blood Sugar Control and Polycystic Ovary Syndrome (PCOS) Treatment

Apple cider vinegar may help with ovulatory function in those with PCOS.

Hand reaching for the stopper on an alarm clock

Does Getting Enough Sleep Help You Lose Weight?

Even getting just one more hour of sleep a night may help with weight control.

Does Lack of Sleep Cause You to Gain Weight?

Those randomized to 8.5 hours of sleep a night lost significantly more body fat than those who got 5.5 hours.

Woman holding upper shoulder as if in pain

The Best Diet for Fibromyalgia and Other Chronic Pain Relief

Anti-inflammatory diets can be effective in alleviating chronic pain syndromes.

Assorted green cruciferous on a slate surface

The Fat-Blocking and Appetite-Suppressing Effects of Thylakoids

What is a natural way to cut down on unhealthy food cravings?

Photo of Dr. Greger and video title on a green background

Answering Your Questions About Cholesterol and Diabetes

I answer some common questions I’ve been asked about cholesterol and diabetes, such as “What is the ideal LDL?” “What’s going on when someone eats healthfully but their glucose is still out of control?”

Balance of money and cigarette on a scale

Using the Cigarette Tax Playbook Against Big Food

How might we replicate one of our great public health victories—the reduction of smoking rates—in the field of nutrition?

Is Allulose a Healthy Sweetener?

Are rare sugars like allulose a healthy alternative for traditional sweeteners?

two doctors discussing medical report on a tablet

The Impacts of Weight Bias in Health Care

How might weight stigma be a vicious cycle?

Weight Bias: Hating Their Guts

How common is weight stigmatization in health care?

half pomegranate and ripe pomegranate fruit on white wooden rustic background

Pomegranate: A Natural Treatment for Rheumatoid Arthritis

Pomegranates are put to the test for weight loss, diabetes, COPD, prostate cancer, osteoarthritis, and rheumatoid arthritis.

Onions Put to the Test for Weight Loss, Cholesterol, and PCOS Treatment

Weight loss, cholesterol, and PCOS treatment with diet. What can an eighth of a teaspoon a day of onion powder do for body fat, and what can raw red onion do for cholesterol?

Medical team preparing equipment for surgery

Extreme Weight-Loss Devices

I discuss the safety and efficacy for weight loss of everything from Botox and corsets to siphons and tapeworms.

group of surgeons in operating room at hospital

Is Gastric Balloon Surgery Safe and Effective for Weight Loss?

Sham surgery trials have shown us that some of our most popular surgeries are themselves shams.

Alarm clock with fork and knife as clock hands

Fasting to Reverse Diabetes

By losing 15 percent of their body weight, nearly 90 percent of those who’ve had type 2 diabetes for less than four years can achieve remission.

table with baked vegetables, fresh salad, berries, bread on a white background

How Sustainable Is the Weight Loss After Bariatric Surgery?

Weight regain after bariatric surgery can have devastating psychological effects.

Full table of vegetables with mixed nuts

Bariatric Surgery vs. Diet to Reverse Diabetes

Losing weight without rearranging your gastrointestinal anatomy carries advantages beyond just the lack of surgical risk.

doctor in protective mask performing surgery while assistants help him

The Complications of Bariatric Weight-Loss Surgery

The extent of risk from bariatric weight-loss surgery may depend on the skill of the surgeon.

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