The basic principles of proper nutrition Nutrition experts think that the whole system is correct and wholesome food is completely fit into 10 principles, compliance with which will help keep strength and health for many years. • There is no single food product that would contain all the necessary components. Therefore, ration should be maximally varied. • Maintaining a normal weight to protect against diseases associated with metabolism. Do not overeat, food intake should be moderate. • The black bread contains more vitamins, minerals and cellular tissue than white. • Two glasses of fat milk a day provide the completely organism necessary amount of calcium and is provided with high quality protein and vitamin B2.