nutri-, nutrit-

(Latin: nutrire; to nourish, to feed, to nurse, to foster, to support, to preserve)

nutritiousness (s) (noun) (no plural)
1. The quality of being wholesome and promoting healthy growth: The nutritiousness of the shampoo that Jane was using was so good that it made her hair soft and shiny.
2. A good ingestion; such as, having the quality of a balanced diet with certain foods: George always shopped at quality grocery shops because he was certain that the freshness and nutritiousness of the local products could be trusted.
nutritive (adjective), more nutritive, most nutritive
1. Relating to a substance that is used by living creatures to help them to grow and be healthy: Jim's mother always tried to provide nutritive meals for the family.
2. A reference to dietary requirements of human beings and other animals to assimilate and to utilize edible substances for new tissues and the production of energy and physical well-being: In order to have a healthy life, people must strive to obtain and to consume nutritive meals.
3. Etymology: from Latin nutritus from nutrire, "to feed, to nourish".
nutriture (s) (noun), nutritures (pl)
An obsolete or outdated term that indicates the status of the body in relation to nutrition, generally or as regards a specific nutrient; such as, protein: The nutriture of of the body indicates how nourishment has influenced a person's health condition.
phytonutrient (s) (noun), phytonutrients (pl)
Plant compounds which are thought to have health-protecting qualities: Phytonutrients are non-nutritive bioactive plant substances; such as, flavonoids or carotenoids, considered to have a beneficial effect on being fit.

The phytonutrients and their antioxidant, immune boosting, and other energy promoting properties of active compounds in plants are being investigated.