Foods Highest in Protein

Protein is a macro nutrient composed of amino acids that is necessary for the proper growth and function of the human body. While the body can manufacture several amino acids required for protein production, a set of essential amino acids needs to be obtained from animal and/or vegetable protein sources. 

Animal protein sources contain the complete set of essential amino acids, while all the essential amino acids can be obtained by eating a wide variety of plant foods. There is considerable debate over the amount of protein a person needs to consume per day, the current recommended daily intake (RDI) of protein is 46 grams for women aged 19-70 and 56 grams for men aged 19-70. Any excess protein consumed is turned into energy by the body, and it is controversial whether this excess protein causes a strain on the liver. A deficiency in protein leads to muscle atrophy, and impaired functioning of the human body in general.

Below is a list of common foods with the highest protein to calorie ratio;