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Dr. Oz: Diane Keaton redefines beauty; weight loss benefits of gluten-free diet

Diane Keaton redefines beauty.
Photo by Theo Wargo/NBC

She caused a generation of girls and women to wear baggy vests and say "La-di-da, la-di-da," after seeing her in the delightful film "Annie Hall." Now Diane Keaton is ready to confess that beneath those baggy vests hid an insecure actress who suffered from body image issues and the eating disorder bulimia. She made that confession to Dr. Mehmet Oz in an appearance on his talk show, looking as stylish and svelte as in the 1970s.

Diane wrote about her battles in "Then Again" (click for details) and "Let's Just Say It Wasn't Pretty." In the latter, Diane re-evaluates what it means to be beautiful and examines aging. In a world where actresses are often put under a merciless spotlight and held to impossible standards of beauty and style, Diane offers a refreshing change. She's also the author of "Diane Keaton: House," which puts a new spin on fashions in decor and design.

On the same episode, Dr. Oz discussed the benefits of a gluten-free low carb diet with Dr. David Perlmutter, author of "Grain Brain: The Surprising Truth about Wheat, Carbs, and Sugar--Your Brain's Silent Killers" (click for details). How it works: Because carbohydrates such as wheat and sugar cause inflammation in your body, consuming them is linked to problems ranging from diabetes to dementia to metabolic syndrome and obesity, says Dr. Perlmutter. He advocates a high fat, low carb diet that contains generous amounts of foods such as avocado, eggs, wild-caught fish, olive oil and vegetables.