Macrobiotics

n.	1.	(Physiol.) The art of prolonging life.
	2.	A philosophy or attitude that health and long life are promoted by adhering to a diet consisting mostly of whole grains, with some vegetables, beans, fruit, and moderate amounts of seafood. However, the absence of essential nutrients such as fat makes such a diet of questionable value if strictly adhered to.

Noun

1.

macrobiotics - the theory of promoting health and longevity by means of diet (especially whole beans and grains)

dietetics