Essential nutrient requirements of the elderly

Body composition, changing physiological functions and nutrient requirements of the elderly.

Age has an important impact on body composition. The decreases of lean body mass and total body water accompanied by an increase of body fat are the most relevant changes leading to a reduction of the basal metabolic rate. Due to this and the fact that elderly people are generally less physically active, energy needs are lower. However, the requirements for most micronutrients are not reduced. ...

The Mineral Nutrient Requirements of Forest Trees

Nutrient requirements of premature infants.

Exact knowledge of the nutrient requirements of premature infants is critically important for the prevention of postnatal growth failure and for improved neurodevelopmental outcome. Methods whereby nutrient requirements can be estimated fall into two categories, factorial methods and empirical methods. Each have their advantages and disadvantages. The factorial methods provide estimates of requ...

The Essential Amino Acid Requirements of Man

The experiments of W. C. Rose16 brought to a successful conclusion the work of Osborne and Mendel,12 and that of Willcock and Hopkins; the matter of the protein requirements in nutrition is fundamentally a question of the need for each of the indispensable amino acids (Sherman"9). While the present crisis has intensified the need for evaluating the approximate human requirements for these essen...

Nutrient Requirements of Solanaceous Vegetable Crops

The solanaceous group of vegetables (tomato, eggplant, chili and bell peppers) generally take up large amounts of nutrients. The amount of nutrients they take up depends on the quantity of fruit and dry matter they produce, which in turn is influenced by a number of genetic and environmental variables. For tomato to produce 1 mt of fresh fruit, plants need to absorb, on average, 2.5 to 3 kg N, ...