Active B12: Each capsule provides 1 mg vitamin B12 as methylcobalamin, which is more efficiently used by the body compared to other forms of vitamin B12, like cyanocobalamin | Heart & Brain Health: Supports a normal level of homocysteine in the body to benefit healthy cardiac function, blood cell formation, and optimal nerve function* | Sleep Support: Helps maintain normal circadian rhythms to support restful sleep and supports healthy methylation processes in the body* | Third-Party Certified: This product has been third-party tested and certified to verify what's in the package matches what's on the label and to confirm it contains no unsafe levels of contaminants | Trusted: Thorne is chosen by champions and trusted by 100+ professional sports teams, a proud partner of U.S. National Teams, and the #1 recommended clinical brand by health-care practitioners (2023 Health-Care Practitioner Seller Survey)