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Studies on malnutrition have the population categorised into different groups including infants, under-five children, children, adolescents, pregnant women, adults and the elderly population. The use of different growth references in different studies leads to variances in the undernutrition prevalence reported in different studies.
Malnutrition and poor nutritional status is an area of concern, affecting 12% to 50% of hospitalized elderly patients and 23% to 50% of institutionalized elderly patients living in long-term care facilities such as assisted living communities and skilled nursing facilities. [20]
The recommended daily allowance of zinc is 11 mg for older men and 8 mg for older women, with an upper tolerable limit of 25–40 mg per day, including both dietary and supplemental sources. However, individuals over 60 often consume less than 50% of the recommended zinc intake, which is crucial for proper body function.
The low-cost food that is generally affordable to the poor in affluent nations is low in nutritional value and high in fats, sugars and additives. In rich countries, therefore, obesity is often a sign of poverty and malnutrition while in poorer countries obesity is more associated with wealth and good nutrition.
Another factor that contributes to malnutrition is conflict. [33] Conflict can lead to uncertainty in resources, which puts them at a higher risk of malnutrition. [33] In addition, the areas in Africa with the highest rates of malnutrition also experience poverty which impact and limit the supply of food and necessary services. [33]
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Food insecurity is defined at a household level, of not having adequate food for any household member due to finances. The step beyond this is very low food security, which is having six (for families without children) to eight (for families with children) or more food insecure conditions in the U.S. Department of Agriculture, Food Security Supplement Survey.
An article about Influences on Cognitive Function in Older Adults (Neuropsychology, November 2014) states that "the nutritional status of older adults relates to their quality of life, ability to live independently, and their risk for developing costly chronic illnesses. An aging adult’s nutritional well-being can be affected by multiple ...