Paryapti with regard to food and paryapti with regard to body are basic foundation in life. How long a particular person would live depends on the paryapti with regard to food. Thyroid and the paryapti with regard to food are closely related. Life span of a person would depend on his paryapti with regard to food. Without the paryapti with regard to food, a person would die.
The process of metabolism has been determined for the cells. As long as the process of regeneration of the cells continues, the cells would remain alive. When the process of regeneration stops, the cells would die. This is related to the paryapti with regard to food.
There is a technical word called oja ahara, which is the basic food. There is one ahara more, that is kavala ahara. Which food we take is taken in morsels. There one more ahara that is roma ahara which we take through blood and the skin of the body. The oja ahara is the basic food. When one is born and is fed at the initial moments with the food is called oja ahara. A person keeps alive till he gets the oja ahara. When he stops getting it, he dies.
Paryapti with regard to food and the oja ahara are closely related.