Positive scientific findings coupled with a long history of traditional use have driven millions of people to the natural mood-fortification properties of St. John's Wort extract. Available in extended delivery, Nature's Plus Herbal Actives St. John's Wort 450 mg extract 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.