nutrition

noun3

1. •
   The organic process by which an organism assimilates food and uses it for growth and maintenance.

   • In the dead state all is apparently without motion. No agent within indicates design, intelligence, or foresight: there is no respiration; no digestion, circulation, or nutrition; […] — 1822
2. •
   That which nourishes; nutriment.

   • I accidentally ate a worm which was in my apple - my uncle said the extra nutrition would do me good.
3. •
   The academic discipline around the scientific study of this process.