response to food (GO:0032094)

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion enzyme production, gene expression, etc.) as a result of a food stimulus; food is anything which, when taken into the body, serves to nourish or build up the tissues or to supply body heat.

General

response to chemical (GO:0042221) response to nutrient levels (GO:0031667)

References

gene ontology: GO:0032094