| Vitamin A Status in Patients With Vocal Fold Leukoplakia (NCT05323292) | University of Wisconsin, Madison | 2022-06-29 |
| Senegal Market Study for Food-to-Food Fortified (F2F) Instant Porridge Flours (NCT05872061) | Purdue University | 2022-01-27 |
| Egg Intervention During Pregnancy in Indonesia (NCT04694235) | SEAMEO Regional Centre for Food and Nutrition | 2021-02-12 |
| Iron and Vitamin A in School Children (NCT04137354) | University Ghent | 2020-11-02 |
| Nutritional Status and Bouillon Use in Northern Ghana (NCT04632771) | University of California, Davis | 2020-10-19 |
| Retinol Status in Preterm Infants and Mothers (NCT04780958) | Ataturk University | 2020-06-01 |
| Liver and Bone Retinol Levels in Guatemalan Adolescents and Adults (NCT04438200) | Newcastle University | 2019-10-24 |
| Bioefficacy of Beta-cryptoxanthin From Biofortified Maize (NCT04153968) | Newcastle University | 2019-04-01 |
| Effect Of Multiple Biofortified Food Crops On Micronutrient Status And Immune Function Among Indian Infants and Their Mothers (NCT02648893) | Cornell University | 2019-02-28 |
| Effects of Fat-soluble Vitamins Supplementation on Common Complications and Neural Development in Very Low Birth Weight Infants (NCT03876704) | First Affiliated Hospital Xi'an Jiaotong University | 2019-01-29 |
| Individualized Dietary Intervention in Breastfeeding Women: Body Weight and Vitamin A Stores (NCT03640104) | Universidad de Sonora | 2018-11-01 |
| Sub Regional Micronutrient Survey in Ethiopia (NCT03353662) | Swiss Federal Institute of Technology | 2018-09-01 |
| Using Stable Isotope Techniques to Monitor and Assess the Vitamin A Status of Children Susceptible to Infection (NCT02363985) | Ethiopian Public Health Institute | 2017-03-01 |
| Assessing Model Parameters for Applying the Retinol Isotope Dilution (RID) Method (NCT02996513) | Wageningen University | 2016-10-01 |
| Vitamin A Equivalence of the Provitamin A in Biofortified Bananas (NCT02702622) | Iowa State University | 2016-03-01 |
| Efficacy of Biofortified Maize to Improve Maternal and Infant Vitamin A Status (NCT02804490) | Johns Hopkins Bloomberg School of Public Health | 2016-03-01 |
| The Efficacy of Pro-vitamin A Biofortified Cassava on Vitamin A Status in Nigerian Preschool Children (NCT02627222) | Wageningen University | 2015-12-01 |
| Effects of EED on Zn Absorption and Retention in Children From a Standard Dose (NCT02760095) | University of Colorado, Denver | 2015-11-01 |
| Using Stable Isotopes to Assess the Effectiveness of Vitamin A Supplementation in Cameroon (NCT03383744) | Centre for Food and Nutrition Research, Yaounde | 2015-10-05 |
| Vitamin A, Stool Microbiota and Vaccine Response in Bangladeshi Infants (NCT02027610) | USDA, Western Human Nutrition Research Center | 2014-10-01 |
| Beta-carotene Absorption and Bioconversion to Vitamin A From Biofortified Cassava Gari (NCT02210507) | USDA, Western Human Nutrition Research Center | 2014-07-01 |
| Effect of Daily Consumption of Orange Maize on Breast Milk Retinol in Lactating Zambian Women (NCT01922713) | University of California, Davis | 2013-10-01 |
| Efficacy of β-carotene Biofortified Maize in Reducing Vitamin A Deficiency Among Children (NCT01695148) | Johns Hopkins Bloomberg School of Public Health | 2012-08-01 |
| Efficacy of Yellow Cassava to Improve Vitamin A Status of Kenyan School Children (NCT01614483) | Wageningen University | 2012-05-01 |
| Effect of SNPs in the BCMO1 Enzyme (NCT02276014) | Newcastle-upon-Tyne Hospitals NHS Trust | 2012-04-01 |
| Vitamin A Liver Reserves and Serum Markers of Vitamin A in US Adults at Time of Death (NCT03305042) | University of Wisconsin, Madison | 2012-02-01 |
| Efficacy of Newborn Vitamin A Supplementation in Improving Immune Function (NCT01583972) | USDA, Western Human Nutrition Research Center | 2012-01-01 |
| Effect of Vitamin A Supplementation on Immune Responses in Human Neonates (NCT01476358) | London School of Hygiene and Tropical Medicine | 2011-11-01 |
| An Efficacy Trial of Iron, Zinc and Vitamin A Fortified Rice in Children in Satun, Thailand (NCT01061307) | Swiss Federal Institute of Technology | 2009-09-01 |
| Dietary Vitamin A Requirement in Chinese Children and the New Technology of Dietary Assessment (NCT01559766) | Huazhong University of Science and Technology | 2009-07-01 |
| Vitamin A Equivalence of Plant Carotenoids in Children (NCT00680212) | Tufts University | 2008-07-01 |
| Estimating Average Vitamin A Requirements in Indonesian and American Women (NCT04123210) | University of Wisconsin, Madison | 2008-03-17 |
| Impact of Maternal Supplementation With Dual Megadose of Vitamin A (NCT00742937) | Instituto Materno Infantil Prof. Fernando Figueira | 2007-07-01 |
| Newborn Vitamin A (VA) Supplementation Pilot Project, Pakistan (NCT00674089) | Aga Khan University | 2007-01-01 |
| Impact of Consumption of Orange-fleshed Sweet Potatoes on the Vitamin A Status of Bangladeshi Women of Reproductive Age (NCT00453648) | University of California, Davis | 2006-03-01 |
| Retinol Equivalence of Plant Carotenoids in Children (NCT00082420) | National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) | 2004-09-01 |
| Community Trial of Newborn Vitamin A Supplementation to Reduce Infant Mortality in Rural Bangladesh (NCT00128557) | Johns Hopkins Bloomberg School of Public Health | 2004-01-01 |
| Impact of Maternal Vitamin A or Beta-Carotene Supplementation on Maternal and Infant Mortality in Bangladesh (NCT00198822) | Johns Hopkins Bloomberg School of Public Health | 2001-08-01 |
| Trial of the Impact of Vitamin A on Maternal Mortality (NCT00211341) | London School of Hygiene and Tropical Medicine | 2000-12-01 |
| Single-dose Postpartum Vitamin A Supplementation of Mothers and Neonates (NCT00198718) | Johns Hopkins Bloomberg School of Public Health | 1997-11-01 |
| Vitamin A to Reduce HIV in Vaginal Secretions and Prevent Viral Transmission (NCT00053612) | National Institute of Allergy and Infectious Diseases (NIAID) | |