ishrana

1. diet; nutrition
   Zdrava ishrana je važnija od bilo kog leka. — A healthy diet is more important than any medicine.
   Moraš da promeniš ishranu ako hoćeš da smršaš. — You have to change your diet if you want to lose weight.
2. (of animals) feeding
   Za ishranu stoke koriste kukuruz. — They use corn to feed the livestock.
3. (of plants, organisms) nutrition
   Azot je neophodan za ishranu biljaka. — Nitrogen is essential for plant nutrition.

Ishrana is diet in general; a weight-loss or medical diet is dijeta.