Vitality

Vitality is the capacity to live, grow, or develop. Vitality is also the characteristic that distinguishes living from non-living things. To experience vitality is regarded as a basic psychological drive and, in philosophy, a component to the will to live. As such, people seek to maximize their vitality or their experience of vitality—that which corresponds to an enhanced physiological capacity and mental state.

Overview
The pursuit and maintenance of health and vitality have been at the forefront of medicine and natural philosophy throughout history. Life depends upon various biological processes known as vital processes. Historically, these vital processes have been viewed as having either mechanistic or non-mechanistic causes. The latter point of view is characteristic of vitalism, the doctrine that the phenomena of life cannot be explained by purely chemical and physical mechanisms.

Prior to the 19th century, theoreticians often held that human lifespan had been less limited in the past, and that aging was due to a loss of, and failure to maintain, vitality. A commonly held view was that people are born with finite vitality, which diminishes over time until illness and debility set in, and finally death.

Religion
In traditional cultures, the capacity for life is often directly equated with the or. This can be found in the Hindu concept, where vitality in the body derives from a subtle principle in the air and in food, as well as in Hebrew and ancient Greek texts.

Vitality and DNA damage
Low vitality or fatigue is a common complaint by older patients. and may reflect an underlying medical illness. Vitality level was measured in 2,487 Copenhagen patients using a standardized, subjective, self-reported vitality scale and was found to be inversely related to DNA damage (as measured in peripheral blood mononuclear cells). DNA damage indicates cellular disfunction.