Effects of vitamin A supplementation during pregnancy and early lactation on body weight of South African HIV-infected women.

Effects of vitamin A supplementation during pregnancy and early lactation on maternal weight among HIV-1-seropositive South African women were examined. Three hundred twelve HIV-seropositive pregnant women between 28 and 32 weeks gestation were studied as part of a randomized, double-blind, placebo-controlled trial at the King Edward VIII Hospital in Durban,South Africa. Patients were randomized to receive placebo or 5,000 IU of retinyl palmitate and 30 mg of beta-carotene daily during pregnancy. At delivery, patients received placebo or 200,000 IU of retinyl palmitate. The main outcome measures were prenatal and postnatal maternal weight and weight loss at three months after delivery as measured in body mass index (BMI). Supplementation of vitamin A was not associated with improvements in prepartum weight gain but was significantly associated with improved weight retention three to six months after delivery (p=0.02). The benefit of vitamin A supplementation appeared to be confined to subgroups with baseline CD4+count <200 cells/μL and serum retinol 0-20 μg/dL. Similar trends were observed in maintenance of postpartum BMI.However, no statistically significant associations were observed.Although there was no benefit of vitamin A supplementation on prepartum weight gain, a benefit on maintenance of postnatal weight was observed. The benefit was highest among those who were vitamin A-deficient or whose CD4+count was <200 cells/μL presupplementation. In populations for whom antiretroviral therapy is not readily available or accessible, the finding that vitamin A may improve postpartum weight lends some hope to a relatively inexpensive treatment which could be used for helping ameliorate some weight loss which is common during HIV infection. Key words : Vitamin A; Vitamin A deficiency; Body weight; HIV; HIV infections; Pregnancy; Lactation; Weight gain; Nutrition; Randomized controlled trials; Double-blind method; South Africa