Weight gain is more complicated than that. A diet is misleading if it suggests there is one cause of weight gain for everyone. And remember, weight loss is still a daily balance between the total number of calories eaten vs. the calories used. Finally, carbohydrates have less than half the calories of fat. Whole grains like breads and cereals are high in fiber.
Fiber helps lower blood cholesterol.
Fruits and vegetables, also sources of carbohydrate, contain fiber and substances, called phytochemicals, which may ward off heart disease and cancer. They can be. Ketosis, as explained above, can cause side effects like nausea and headaches. Women who are pregnant or nursing and those with kidney problems should not follow these diets because these diets stress the kidneys. The high protein translates into a diet higher in fat than recommended.