The human body (purush) derives strength from prakriti (nature). Nature cure literally means healing by letting nature take its own course. Human body is a wonderful machine with self-healing inner force being called vitality. Based on this theory of vitality a new branch of biology was developed which is known as natural hygiene.

Natural Hygiene means the natural way of keeping the whole system clear without any toxins. Natural hygienist employ fast as a means of promoting health and enabling body to recover speedily from illness.

For being healthy both mentally and physically natural hygiene has to strictly follow in the day to day life. Natural Hygiene implements fast a method for reducing weight, for curing long run diseases without damaging the skin, tissues, or any other organs of the body. The most important rule is our eating habits, and indeed in our daily lives, in this: Never force food into the stomach either in health or in sickness unless there is a definite demand for it as manifested by genuine hunger. As fast progresses pent-up secretions or, more properly retained waste are thrown out of the body and the system becomes purified. Relief of irritation occurs, the body becomes rested. In a vital sense the individual is made over. So a few day fast is required to free the blood and lymph of their toxic excess present.