Not in an extreme, Atkins sort of way, but having a little protein at every meal fires up your metabolism. "Your digestive system uses more energy to break it down, so you burn more calories," explains Lisa Dorfman, R.D. However, keep protein levels to between 20 and 35 percent of your diet; eating too much of it can cause kidney strain and may cause your body to store too much fat.
To figure out how many calories you burn a day, calculate your resting metabolic rate—the number of calories you burn daily doing routine activities, not including formal exercise—using this formula: RMR = bodyweight (in lbs) x 13. Next, determine how many calories you burn through exercise—a half-hour of moderate-intensity aerobic exercise burns around 350 calories in the average man, and a half-hour of lifting burns around 200. Add your RMR to the calories you burn in the gym, and keep your daily calorie consumption below that total.

Don't blame your chocolate craving on a lack of willpower. Turns out, there's a physiological reason ice cream, french fries, and cupcakes are so hard to resist: Our bodies are wired to crave rich food. Studies have shown that the taste of fat can give us the munchies by triggering a release of chemicals similar to those experienced by drug addicts. "Some people are hypersensitive to food," says Eric Stice, PhD, a senior research scientist at the Oregon Research Institute. "They find things like chocolate cake orgasmic, so they tend to overeat it."
14 ways to lose weight without diet or exercise Strict diets can be challenging to follow, and people may not always have the time or ability to exercise. However, a variety of simple lifestyle changes can help people lose weight and improve their health. These include taking probiotics, getting enough sleep, and thoroughly chewing food. Learn more here. Read now