Antioxidant and vitamin A precursor | Beta carotene is a precursor to vitamin A. It supports immune health, enhances visual acuity, and quenches free radicals. Beta carotene capsules by Pure Encapsulations antioxidant potential also supports healthy tissues and DNA integrity. As a precursor, the body converts beta carotene to vitamin A as needed.Beta carotene is one of the major dietary antioxidants, offering free radical scavenger activity and provitamin A activity.