What it is
Hypericum perforatum flower/leaf/stem extract is prepared from the flowering tops, leaves, and stems of St. John's wort, a plant with a long herbal history. It contains flavonoids and other constituents associated with soothing and antioxidant effects when used topically. In sunscreens and creams it is included as a calming, conditioning botanical.
Safety & warnings
St. John's wort contains hypericin, a constituent that can act as a photosensitizer at higher exposures, a phenomenon best documented with internal use. In topical cosmetic extracts the levels are low, but its presence in a leave-on sun product is worth noting for those particularly concerned about photosensitivity. As with any botanical, isolated sensitivities are possible.
Origin & sourcing
Natural; obtained from the above-ground parts (flowers, leaves, and stems) of Hypericum perforatum.
History
St. John's wort has been used in European herbal traditions for centuries, and this heritage informed its later adoption as a soothing cosmetic botanical.
Questions everyone asks
What is St. John's wort extract used for in skincare?
It is used as a soothing, conditioning, and antioxidant botanical drawn from the plant's flowers, leaves, and stems.
Does St. John's wort cause photosensitivity?
Its hypericin can act as a photosensitizer at higher exposures, mainly noted with internal use; cosmetic extracts contain comparatively low amounts.