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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. [28]
Vitamin A deficiency affects one third of children under age 5 around the world, [33] leading to 670,000 deaths and 250,000–500,000 cases of blindness. [34] Vitamin A supplementation has been shown to reduce all-cause mortality by 12 to 24%. [35]
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 ...
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]
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 ]
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).
Prevalence of vitamin A deficiency in 1995. Vitamin A deficiency is common in developing countries but rarely seen in developed countries. Approximately 250,000 to 500,000 malnourished children in the developing world go blind each year from a deficiency of vitamin A. [49] Vitamin A deficiency in expecting mothers increases the mortality rate ...