If you ask folks what food group they should avoid, most will probably answer "fats." While it's true that, in large amounts, some types of fat are bad for your health (not to mention your waistline), there are some we simply can't live without. Among them are the omega-3 fatty acids, found in foods including walnuts, some fruits and vegetables, and coldwater fish such as herring, mackerel, sturgeon, and anchovies.
"It not only plays a vital role in the health of the membrane of every cell in our body, it also helps protect us from a number of key health threats," says Laurie Tansman, MS, RD, CDN, a nutritionist at Mount Sinai Medical Center in New York.



Three weeks on a low-fat vegan diet gets you on the road to your healthy weight goal. 