Hypericum Extract Average Plant extracts Hydration Anti-Ageing Hypericum Extract description Hypericum extract is also known as St. John’s wort. It contains several components that can cause a negative reaction on skin when it is exposed to sunlight; however, this is a bigger concern when St. John’s wort is taken orally. Like most plants, it’s a rich source of antioxidants. Related ingredients: St. John's Wort Hypericum Perforatum Flower/Leaf/Stem Extract Hypericum Perforatum Extract