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Malnutrition occurs when an organism gets too few or too many nutrients, resulting in health problems. [11] [12] Specifically, it is a deficiency, excess, or imbalance of energy, protein and other nutrients which adversely affects the body's tissues and form. [13] Malnutrition is a category of diseases that includes undernutrition and ...
Starvation is a severe deficiency in caloric energy intake, below the level needed to maintain an organism's life. It is the most extreme form of malnutrition.In humans, prolonged starvation can cause permanent organ damage [1] and eventually, death.
Acute hunger is typically used to denote famine like hunger, though the phrase lacks a widely accepted formal definition. In the context of hunger relief, people experiencing 'acute hunger' may also suffer from 'chronic hunger'. The word is used mainly to denote severity, not long-term duration. [7] [8] [5]
Hunger is a sensation that motivates the consumption of food. The sensation of hunger typically manifests after only a few hours without eating and is generally considered to be unpleasant. Satiety occurs between 5 and 20 minutes after eating. [1] There are several theories about how the feeling of hunger arises. [2]
Malnutrition and its consequences are large contributors to deaths, physical deformities, and disabilities worldwide. [3] Good nutrition is necessary for children to grow physically and mentally, and for normal human biological development.
Human behavior is closely related to human nutrition, making it a subject of social science in addition to biology. Nutrition in humans is balanced with eating for pleasure, and optimal diet may vary depending on the demographics and health concerns of each person. [37] Humans are omnivores that eat a variety of foods.
Once malnutrition is treated, adequate growth is an indication of health and recovery. [5] Even after recovering from severe malnutrition, children often remain stunted for the rest of their lives. [5] Even mild degrees of malnutrition double the risk of mortality for respiratory and diarrheal disease mortality and malaria. [5]
Starvation response in animals (including humans) is a set of adaptive biochemical and physiological changes, triggered by lack of food or extreme weight loss, in which the body seeks to conserve energy by reducing metabolic rate and/or non-resting energy expenditure to prolong survival and preserve body fat and lean mass.