DHA can refer to two different substances:1. Docosahexaenoic acid, an omega-3 fatty acid, is believed to play a crucial role in the development of infants, especially concerning their brain and eye health. This 22-carbon polyunsaturated fatty acid is naturally found in breast milk and is often included in various infant formulas. Additionally, postnatal DHA supplementation may enhance vision and certain cognitive functions in young children. It is abundant in fish like tuna and bluefish, as well as in oils derived from marine animals.2. Dihydroxyacetone is the key component in sunless tanning products. This colorless sugar works by staining the dead cells on the skin's outermost layer, leading to a temporary change in skin color. As these dead skin cells are naturally shed, the tan gradually disappears, usually within 5 to 7 days. When using products containing DHA, it is important to avoid contact with the eyes, lips, and any mucous membranes, as well as to prevent inhalation or ingestion of the product.