The food and nutrition board (fnb) of the national academy of sciences says that 10% to 35% of calories should come from protein and from carbohydrate.

 45% to 65% of calories should come from carbohydrate.

Explanation:

Food and Nutrition Board of National Academy of Sciences was established in 1940, provides principles and guidelines for the good nutrition, study about the issues of global and national importance on the safety and adequacy of the U.S food supply. It also provides authoritative judgement on the relation among nutrition, food intake, health maintenance and disease prevention.