How does green papaya enlarge breasts and lose weight, where is the principle? Green papaya contains abundant papain, papaya proteinase, rennet proteinase, carotene, more than seventeen kinds of amino acids and various nutritional elements, which are very beneficial for breast enlargement. Therefore, papaya for breast enlargement is a very good way, it is a "precious fruit" with rich nutrition and all benefits and no harm. Some people start to have reactions of breast enlargement after eating papaya, while others do not. This is because papaya causes different symptoms in different individuals due to personal physical differences.