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Prevalence of vitamin A deficiency, 1995-2005. Vitamin A deficiency (VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. [1] It is common in poorer countries, especially among children and women of reproductive age, but is rarely seen in more developed countries. [1]
For example, in the United States of America, one out of every six children is at risk of hunger. [ citation needed ] A study, based on 2005–2007 data from the U.S. Census Bureau and the Agriculture Department , shows that an estimated 3.5 million children under the age of five are at risk of hunger in the United States .
Clinical vitamin A deficiency is particularly common among pregnant women, with prevalence rates as high as 9.8% in South-East Asia. [ 120 ] Estimates say that 28.5% of the global population is iodine deficient, representing 1.88 billion individuals. [ 124 ]
The causes are vitamin A deficiency during pregnancy, followed by low transfer of vitamin A during lactation and infant/child diets low in vitamin A or β-carotene. [ 22 ] [ 19 ] The prevalence of pre-school age children who are blind due to vitamin A deficiency is lower than expected from incidence of new cases only because childhood vitamin A ...
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.
Its partnership with the GOB began in 1982. The Bangladesh Nutritional Blindness Study was conducted, and it indicated that there was a high prevalence of vitamin A deficiency. By 2005, vitamin A deficiency among children 12 to 59 months, as measured by prevalence of night blindness, has decreased to 0.04% from 3.76% in 1982. [11]
Prevalence of vitamin A deficiency. Red is most severe (clinical), green least severe. Countries not reporting data are coded blue. Data collected for a 1995 report. The research that led to golden rice was conducted with the goal of helping children who suffer from vitamin A deficiency (VAD).
Micronutrient deficiencies are considered a public health problem worldwide. For over 30 years it has been estimated that more than two billion people of all ages are affected by this burden, [1] while a recently published study based on individual-level biomarker data estimated that there are 372 million children aged 5 years and younger, and 1.2 billion non-pregnant women of reproductive age ...