Researchers conducted a systematic review and meta-analysis to assess the effect of vitamin A supplementation (VAS) on iron status biomarkers and anemia in children, teenagers, and pregnant or lactating women. Results showed that VAS was significantly associated with a reduced risk of anemia and increased levels of hemoglobin. However, no association was observed between VAS and prevalence of iron deficiency, despite increased levels of ferritin. Authors concluded that VAS may reduce the risk of anemia by improving levels of hemoglobin and ferritin in individuals with low serum retinol levels.
Marcela de Sa Barreto da Cunha et al. Food Science and Nutrition (February, 2018).