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Vitamin deficiency
Vitamin deficiency is the condition of a long-term lack of a vitamin. When caused by not enough vitamin intake it is classified as a primary deficiency, whereas when due to an underlying disorder such as malabsorption it is called a secondary deficiency. An underlying disorder may be metabolic – as in a genetic defect for converting tryptophan to niacin – or from lifestyle choices that increase vitamin needs, such as smoking or drinking alcohol. Governments guidelines on vitamin deficiencies advise certain intakes for healthy people, with specific values for women, men, babies, the elderly, and during pregnancy or breastfeeding. Many countries have mandated vitamin food fortification programs to prevent commonly occurring vitamin deficiencies. Conversely hypervitaminosis refers to symptoms caused by vitamin intakes in excess of needs, especially for fat-soluble vitamins that can accumulate in body tissues.
Handbook of healthcare in the Arab World
Examines health and medical care in the Arab world from a systems biology approach. It features comprehensive coverage that includes details of key social, environmental, and cultural determinants. In addition, the contributors also investigate the developed infrastructure that manages and delivers health care and medical solutions throughout the region. More than 25 sections consider all aspects of health, from cancer to hormone replacement therapy, from the use of medications to vitamin deficiency in emergency medical care. Chapters highlight essential areas in the wellbeing and care of this population. These topics include women’s health care, displaced and refugee women’s health needs, childhood health, social and environmental causes of disease, health systems and health management, and a wide range of diseases of various body systems. This resource also explores issues related to access and barriers to health delivery throughout the region.
