The same happens when beans are eaten with a tortilla. Most people eat more protein than they need. In a review of three-day diet records from our clinic, the young men were getting approximately three times, and the young women two times the amount of protein needed. High protein intake usually results in high animal fat intake, which may be bad for the heart. It may also provide an extra stress for some people's kidneys.
Carbohydrates are important mainly as an energy source for the body.
It used to be believed that simple sugars were rapidly absorbed and complex carbohydrates were slowly absorbed. This is an easy concept to explain and to believe, but it is NOT true. Research has shown that there is no difference in absorption of a simple sugar as compared to a complex carbohydrate. This is because the intestine has such high levels of digestive enzymes that the complex carbohydrates are rapidly broken down to simple sugars. Insulin is essential to allow sugar to pass into the cells of the body to be burned for energy.