Positive scientific findings coupled with a long history of traditional use have driven millions of people to the natural mood-fortification properties of St. Johns Wort extract. Available in extended delivery, NaturesPlus Herbal Actives St. Johns Wort 450 mgextract is uniformly standardized to a minimum of 0.3% - 0.5% 1.35 mg - 2.25 mg hypericin to guarantee that each and every tablet provides consistent potency and activity. Each extended-release tablet, providing the greatest concentration of active botanical principles, maximizes the synergistic benefits of the whole flower, which naturally contains flavonoids, tannins, xanthrones, monoterpenes and phytosterols.