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Dr. Oz: Diane Keaton's bulimia and low-carb ketogenic diet stems Alzheimer's

Dr. Oz: Diane Keaton's bulimia and Grain Brain author David Perlmutter says gluten causes Alzheimer's
Dr. Oz: Diane Keaton's bulimia and Grain Brain author David Perlmutter says gluten causes Alzheimer'sFox screengrab

Dr. Mehmet Oz spoke to actress Diane Keaton about her longtime battle with the eating disorder bulimia and examined whether gluten causes Alzheimer's disease on the May 8 episode of the Dr. Oz Show.

Keaton began her tortured battle with bulimia at 22 when she ordered to lose 10 pounds while starring in the Broadway production of "Hair."

The Oscar winner struggled with bulimia for four years, binge-eating and purging in secret. Keaton, who ate 20,000 calories a day at the height of her bulimia, said she was compulsive addict who used food to cope with her unhappiness.

Diane Talks Aging and Plastic Surgery

Keaton decided on her own to stop binge-eating and purging and to this day can't remember exactly what triggered her decision. She detailed her battle in her 2012 memoir, Then Again.

Keaton, 68, said she's annoyed with her age-related hair loss but has never had plastic surgery. But she admires women like Joan Rivers who openly discuss all their cosmetic surgeries.

Diane admitted aging is difficult, but she embraces the process. "I never understood the idea that you're supposed to mellow as you get older," she said. "Slowing down isn't something I relate to at all. The best part is that I'm still here. And because the end is in sight, I treasure life all the more."

Keaton discussed her thoughts on aging, beauty, love, success and happiness in her new book, Let's Just Say It Wasn't Pretty.

Low-Carb, Gluten-Free Ketogenic Diet Prevents Alzheimer's

On a separate segment, Dr. Oz's guest was neurologist Dr. David Perlmutter, who said gluten is unhealthy and causes Alzheimer’s disease. Gluten is a protein found in foods processed from wheat and other grains. It's what gives pizza dough its chewy texture.

Even if you don't have a gluten allergy or sensitivity, gluten is unhealthy and should be avoided because causes weight gain, diabetes and dementia, said Perlmutter, who detailed his research in his bestseller, Grain Brain.

According to Perlmutter, a high-carb, grain-heavy diet damages the brain and fuels dementia, Alzheimer's disease and ADHD. Perlmutter, who himself follows the low-carb, high-fat ketogenic diet, said drastically reducing carbs promotes effortless weight loss and prevents and even reverses Alzheimer's, Parkinson's, and ADHD.

Perlmutter, whose father suffers from Alzheimer's, said gluten is also a major cause of inflammation, which leads to heart disease, diabetes, and cancer. Dr. Perlmutter said his patients who had suffered severe muscle spasms experienced dramatic relief after following a gluten-free diet. He said eliminating gluten also relieves chronic indigestion and migraines.

'Eat Fat And Get Skinny'

Perlmutter said eating more healthy fats and reducing carb intake protects your brain and promotes optimal overall health. "Carbs are devastating for the brain," he said. "The brain thrives on a fat-rich, low-carb diet."

Dr. Perlmutter recommends a low-carb diet — limiting carbs to no more than 80 grams a day — and eating lots of dietary fats, such as extra-virgin olive oil, avocado, grass-fed butter, wild fish, grass-fed beef, coconut oil, and nuts. "The fate of your brain is not in your genes; it's in the food you eat," he said.

Perlmutter joins a growing number of medical experts who are debunking the myth that saturated fat is unhealthy. Obesity expert Dr. Eric Westman said the low-carb, high-fat Atkins and ketogenic diets produce rapid weight loss without exercise, calorie-counting or hunger.

Westman, who oversees the Duke University Obesity Clinic, has seen hundreds of patients lose thousands of pounds and reverse their diabetes and heart disease on a ketogenic diet, which is a high-fat, moderate-protein, low-carb eating plan.

"I tell my patients not to fear the fat," said Dr. Westman, author of A New Atkins for a New You. "Eat lots of fat. Fat makes you feel full. There's no problem with fat. In fact, saturated fat — the fat that we've been taught not to eat — raises your good cholesterol best of all the foods you can eat."