Man requires food which supply tissue building substances to provide for the growth and daily wear and tear of the body. It should also contain something which can supply energy, fat, certain salts and roughage to help the excretion of waste matter. Tissue building substances are known as proteins. They are obtained from milk, meat, eggs, pulse and nuts. The protein contained in milk and meat, in other words, the animal protein being more digestible and assailable, are much valuable than vegetable proteins.
Milk is superior to meat.
The medicos tell us that in cases when meat cannot be digested, milk is digested quite easily. For vegetarians milk being the only source of animal proteins, is a very important article of diet. The proteins in raw eggs are considered to be the most easily digestible of all proteins. But everybody cannot afford to drink milk. And it is not available in all places.