Because of its unusually high concentration of beta-carotene, Gac fruit is a valuable aid in preventing or treating vitamin A deficiency. One study of children conducted in Vietnam measured blood plasma levels of vitamin A before and after the consumption of a Gac fruit extract. The study showed that vitamin A levels increased with supplementation. In many developing countries, vitamin A deficiency is epidemic. Such deficiency can cause poor night vision, blindness, reduced ability to fight infections, higher rates of maternal mortality, poor embryonic growth, and reduced lactation. Supplementation with Gac fruit extract can alleviate chronic vitamin A deficiency, and help to reduce these health problems.