What knowledge is needed to maintain health for many years and to cure a sick person?

Knowledge for maintaining health and treatment: proper nutrition, physical regimen, optimal daily routine, outdoor activities, landscaping of places of residence, clean air, the use of natural raw materials for the manufacture of medicines, the use of natural food products.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.