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08 December 2010

Vitamins cut measles and diarrhoea deaths

A new study strongly endorses the continuation of vitamin A supplementation programmes, which reduce the incidence of measles and diarrhoea and ultimately save lives.

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Vitamin A supplements are still an effective way to reduce childhood death and disease. A new study by Cochrane researchers strongly endorses the continuation of vitamin A supplementation programmes, which reduce the incidence of measles and diarrhoea and ultimately save lives.

Vitamin A deficiency is a common problem in low and middle income countries. People whose diets do not include enough of the vitamin may have impaired body functions, and be more susceptible to blindness, infection and early death. The World Health Organisation (WHO) recommends vitamin A supplements for pregnant mothers and children.

However, controversies have recently been raised regarding the effectiveness of vitamin A supplementation programmes in developing countries.

The 43 trials included in the review involved 215,633 children between six months and five years of age. All except one trial used the standard dose of vitamin A as recommended by the WHO.

Overall, giving vitamin A capsules reduced the risk of death from any cause by 24% compared to placebos or usual treatment. This equates to saving the lives of almost a million vitamin A deficient children a year.

What the review found

The review suggests that much of the beneficial effect vitamin A supplementation in developing countries may be related to prevention of measles and diarrhoea.

"Giving vitamin A is associated with a reduction in the incidence of diarrhoea and measles, as well as the number of child deaths due to these diseases," said Zulfiqar Bhutta, Chairman of the Division of Women and Child Health at Aga Khan University in Karachi, Pakistan and the senior reviewer of the project. "However, the effects of supplementation on disease pathways are not well understood, so this could be a focus for further studies."

The researchers strongly recommend continuation of vitamin A supplementation programs in children under five, but recognise that this it is not a permanent solution to the problem of vitamin A deficiency.

"Fortification, dietary diversification, food distribution programs and horticultural developments such as home gardening and bio-fortification may provide more permanent relief," said Bhutta.

"For example, vitamin A content could be increased in staples such as rice or growers may aim to promote use of biofortified foods such as orange sweet potato." (EurekAlert/November 2010)

Read more:
Polio and measles: the fight's not over
Could your kid get measles?
Diarrhoea kills 2m kids per year

 
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