A casual walk after a meal isn’t harmful, but whether you should do a walking fitness routine after eating is a bit more complex. In general, nutrition before a workout is essential for several reasons, including providing much-needed energy.

The idea of losing weight might bring to mind eating a limited intake of calories and sweating through a daily vigorous exercise routine, but deep breathing offers help, too. According to a study conducted by Anand B.

Ketogenic dieting is a controversial weight loss method, popularized by Dr. Robert Atkins. During a ketogenic diet, carbohydrates are severely restricted and replaced with high amounts of fat and protein. With no carbohydrates, the body shifts into ketosis, a form of fat metabolism.

Whole foods are eaten in their natural form. A tomato, for example, is a whole food, while ketchup is not. Consuming mainly whole foods limits your exposure to additives, preservatives, chemicals, sodium and sugar. It may also help you squeeze more nutrition out of meals, as your body best absorbs nutrients from food.

The Paleo diet is promoted as a diet built on what humans evolved eating during the Paleolithic period to help you achieve your optimal weight and health, according to Robb Wolf, biochemist and author of "The Paleo Solution."

The Ab Flex Belt website features recommendations from television stars, professional athletes and Hollywood trainers. Moreover, the manufacturer of the Flex Belt claims the U.S. Food and Drug Administration cleared the device for toning and strengthening the stomach muscles.

Bread may be out on your low-carb diet, but what about beer? You may have heard that alcohol stops your body from burning fat. While this may be true, it's very temporary, and as long as you're only having an occasional beer, it shouldn't affect your weight loss.

Following the proper diet before a colonoscopy is critical for success of the exam. Rectal and colon cancer is generally detected through a colonoscopy. Other conditions involving the large intestine and rectum may also involve the procedure.

The promise of fast weight loss in a short period of time or losing weight while still eating anything you want is enticing if you want to reach your ideal weight; but fad diets rarely yield healthy long-term results.

Few diets have ever been more controversial than the Atkins Diet Plan. First introduced by Dr. Robert Atkins in 1972, the plan severely restricts consumption of carbohydrates in the form of bread, pasta, rice and starchy vegetables.

Dr. Howard Hay pioneered the concept of food combining, according to nutritional author Jackie Habgood.His Hay Diet derives from the principle that digestive enzymes and the digestive process vary greatly depending upon the type of food you consume.

Dr. Mehmet Oz swears his 3-Day Detox Cleanse will rejuvenate toxic bodies. He outlined the plan on “The Dr. Oz Show” in 2012.