NOW Foods Vitamin A 10,000 IU provides preformed retinol — the most directly bioavailable form of vitamin A — at a robust 10,000 IU dose in an oil-based softgel for maximum fat-soluble vitamin absorption. Unlike beta-carotene (provitamin A), preformed retinol requires no conversion and is immediately available for use in immune function, vision health, skin integrity, and cellular differentiation. Vitamin A is essential for maintaining the mucosal barriers of the respiratory tract, digestive system, and skin — the first lines of defense against pathogens. It plays a critical role in immune cell development and normal vision in dim light. NOW Foods delivers pure retinol in a soybean oil softgel manufactured in their GMP-certified facility with batch potency testing. Note: preformed vitamin A can accumulate — do not exceed recommended doses without medical guidance.