nutriment

n. that which nourishes, source of sustenance

Nutrition is a science that examines the relationship between diet and health. Dietitians are health professionals who specialize in this area of study, and are trained to provide safe, evidence-based dietary advice and interventions.Deficiencies, excesses and imbalances in diet can produce negative impacts on health, which may lead to diseases such as cardiovascular disease, diabetes, scurvy, obesity or osteoporosis, as well as psychological and behavioral problems. Moreover, excessive ingestion of elements that have no apparent role in health, (e.g. lead, mercury, PCBs, dioxins), may incur toxic and potentially lethal effects, depending on the dose.
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Noun
1. a source of materials to nourish the body
(synonym) nourishment, nutrition, sustenance, aliment, alimentation, victuals
(hypernym) food, nutrient
(hyponym) milk

(n.)
That which promotes development or growth.
  

(n.)
That which nourishes; anything which promotes growth and repairs the natural waste of animal or vegetable life; food; aliment.
  

Broadly (in human nutrition), anything that contains or consists of nutrients and is regarded by a people as appropriate for consumption.