The low-carbohydrate diet was all the rage a few years back, as you probably remember. Popularized by Doctor Robert Atkins, this diet seemed to have the entire nation swearing off bread, pasta and potatoes. Dieters stampeded to the buffet table to load their plates with proteins and fats, but shunned even the smallest quantity of whole grains.

Specifically, the low-carb diet prescribed eating more protein to offset this deficiency of carbs. This tactic conflicted sharply with the previously accepted recommendation of eating 30 percent of your calories from protein and 50 percent from carbohydrates.

When restricting carbohydrate intake, the body enters into a completely different metabolic state known as ketosis. In this state, your body burns its own fat for fuel instead of the carbohydrates it normally burns. When your body is in ketosis, you feel less hungry and, naturally, eat less than you usually do.

While this sounds great, there is, of course, a downside to this process. Ketosis can create adverse side effects including kidney problems, kidney failure, and high cholesterol,

Diets in which the majority of calories eaten come from protein force the body to excrete more calcium during urination than normal. After an extended period, this can increase your risk of osteoporosis kidney stones