Nutrition plays a critical role in every stage of our lives. From infancy to late life, nutrition in diet needs a change. It is important to take age-appropriate nutrition during all stages of the life cycle to make sure that you remain healthy as you grow.

Nutrition is the biochemical and physiological process by which an organism uses food to support its life. It includes Ingestion, absorption, assimilation, biosynthesis, catabolism, and excretion.

Throughout our life, nutrition deals with the provision of essential nutrients from the food that is necessary to support human life and good health. In humans, poor nutrition can cause deficiency-related diseases such as blindness, anemia, scurvy, preterm birth, stillbirth, and cretinism, and nutrient excess health-threatening conditions such as obesity and metabolic syndrome.

Elderly persons differ from those younger adults because of a reduction in lean body mass, metabolic rate, and physical activity, elderly people require less energy than younger individuals need. Some elderly persons have difficulty getting adequate nutrition because of age or disease-related impairments in chewing, swallowing, digesting, and absorbing nutrients.

In our whole life cycle, nutrition intervention should first emphasize healthful foods, with supplements playing a judicious secondary role. Although modest supplementary doses of micronutrients can both prevent deficiency and support immune function.