GC: n

S: http://www.healthyfood.co.uk/ (last access: 30 July 2015); http://www.healthyfood.co.nz/ (last access: 30 July 2015).

N: 1. 1550s, «being in a sound state;» also «conducive to health,» from health + -y. Earlier in the same sense was healthsome (1530s). Related: Healthily; healthiness.
Healthsome is from 1530s in the sense «bestowing health.»
food (n): Middle English foode, fode, from Old English foda «food, nourishment; fuel,» also figurative, from Proto-Germanic fodon, from Germanic fod- «food,» from PIE pat-, extended form of root pa- «to tend, keep, pasture, to protect, to guard, to feed» (cognates: Greek pateisthai «to feed;» Latin pabulum «food, fodder,» panis «bread,» pasci «to feed,» pascare «to graze, pasture, feed,» pastor «shepherd,» literally «feeder;» Avestan pitu- «food;» Old Church Slavonic pasti «feed cattle, pasture;» Russian pishcha «food»).
Food-chain is from 1917. Food-poisoning attested by 1864; food-processor in the kitchen appliance sense from 1973; food-stamp (n.) is from 1962.
2. Healthy food choices are foods that are not high in fat or sugars.

S: 1. OED – http://www.etymonline.com/index.php?term=healthy; http://www.etymonline.com/index.php?allowed_in_frame=0&search=food&searchmode=none (last access: 30 July 2015). 2. TERMIUMPLUS.

SYN:
S:

CR: alimentary, health food, nutrient, organic food.