Rolf D W Klemm1, Amanda C Palmer2, Alison Greig3, Reina Engle-Stone4, Nita Dalmiya5. 1. Helen Keller International, New York, NY, USA Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA rklemm@hki.org. 2. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. 3. Micronutrient Initiative, Ottawa, Ontario, Canada. 4. University of California, Davis, CA, USA. 5. UNICEF, West and Central Africa Regional Office, Dakar, Senegal, Africa.
Abstract
BACKGROUND: Vitamin A deficiency (VAD) remains a widespread public health problem in the developing world, despite changes in under-5 mortality rates, morbidity patterns, and intervention options. OBJECTIVE: This article considers the implications of a changing epidemiologic and programmatic landscape for vitamin A (VA) programs. METHODS: We review progress to prevent VAD and its health consequences, assess gaps in VA status and intervention coverage data, and assess data needed to guide decisions regarding the optimal mix, targeting, and dose of VA interventions to maximize benefit and minimize risk. RESULTS: Vitamin A supplementation programs have contributed to the reduction in under-5 mortality rates, but alone, do not address the underlying problem of inadequate dietary VA intakes and VAD among preschool-aged children in the developing world. A combination of VA interventions (eg, supplementation, fortified foods, multiple micronutrient powders, and lipid-based nutrient supplements) will be required to achieve VA adequacy in most settings. Current efforts to measure the coverage of multiple VA interventions, as well as whether and how much VA children are receiving, are few and fragmented. CONCLUSIONS: Where intervention overlap exists, further effort is needed to monitor VA intakes, ensuring that targeted groups are consuming adequate amounts but not exceeding the tolerable upper intake level. Vitamin A status data will also be critical for navigating the changing landscape of VA programs. Data from these monitoring efforts will help to guide decisions on the optimal mix, targeting, and exposure to VA interventions to maximize public health benefit while minimizing any potential risk.
BACKGROUND: Vitamin A deficiency (VAD) remains a widespread public health problem in the developing world, despite changes in under-5 mortality rates, morbidity patterns, and intervention options. OBJECTIVE: This article considers the implications of a changing epidemiologic and programmatic landscape for vitamin A (VA) programs. METHODS: We review progress to prevent VAD and its health consequences, assess gaps in VA status and intervention coverage data, and assess data needed to guide decisions regarding the optimal mix, targeting, and dose of VA interventions to maximize benefit and minimize risk. RESULTS:Vitamin A supplementation programs have contributed to the reduction in under-5 mortality rates, but alone, do not address the underlying problem of inadequate dietary VA intakes and VAD among preschool-aged children in the developing world. A combination of VA interventions (eg, supplementation, fortified foods, multiple micronutrient powders, and lipid-based nutrient supplements) will be required to achieve VA adequacy in most settings. Current efforts to measure the coverage of multiple VA interventions, as well as whether and how much VAchildren are receiving, are few and fragmented. CONCLUSIONS: Where intervention overlap exists, further effort is needed to monitor VA intakes, ensuring that targeted groups are consuming adequate amounts but not exceeding the tolerable upper intake level. Vitamin A status data will also be critical for navigating the changing landscape of VA programs. Data from these monitoring efforts will help to guide decisions on the optimal mix, targeting, and exposure to VA interventions to maximize public health benefit while minimizing any potential risk.
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