St. John's Wort extract is standardized to 0.3% dianthrones measured as hypericin. This product provides the clinically researched dose for promoting a positive mood.
Precautions: Do not use this product while taking any prescription drug without the advice of your prescribing physician. Avoid excessive exposure to UV radiation (e.g. sunlight, tanning) when using this product. Not recommended for use by pregnant or lactating women. Keep out of reach of children.