Being high in protein and rich in many vitamins and minerals, lean pork can be an excellent addition to a healthy diet. By dry weight, the protein content of lean pork can be as high as 89%, making it one of the richest dietary sources of protein. Pork is a rich source of vitamins and minerals including Thiamine, Selenium, Zinc, Vitamin B12 & B6, Niacin, Phosphorus, and iron.