In the realm of nutrition, a diet refers to the aggregation of food and drinks consumed by an individual or other organism. These dietary habits are essentially the decisions made habitually by an individual or culture regarding what to eat. The term ‘diet’ often connotes the deliberate intake of specific nutrients for maintaining health, managing weight, or both – activities frequently interconnected.

Although humans are biologically capable of consuming a broad range of foods, personal preferences, cultural norms, and ethical considerations greatly influence each person’s dietary choices. These choices can lean towards being healthier or less so, depending on their nutritional composition.

A balanced diet is crucial for proper nutrition and requires the ingestion and absorption of vitamins, minerals, and food energy in the forms of carbohydrates, proteins, and fats. The choices and habits related to diet play a substantial role in determining the quality of life, overall health, longevity, and even cultural identity. They can also reflect religious beliefs, as dietary norms and restrictions often form part of religious practices. Thus, diets, aside from their nutritional function, can also serve as cultural and social markers.