St. John's wort

Plant Extracts , Antioxidants

Contains several components that can cause a negative reaction on skin in the presence of sunlight so any product that contains St. John's wort should be followed by application of a broad-spectrum sunscreen rated SPF 15 or greater (Sources: British Journal of Dermatology, February 2008, pages 360-369; Planta Medica, February 2002, pages 171–173; and International Journal of Biochemistry and Cell Biology, March 2002, pages 221–241). St. John’s wort’s association with improving depression when taken as an oral supplement is unrelated to its topical impact on skin. However, it also has potent antioxidant properties (Source: Journal of Agricultural Food Chemistry, November 2001, pages 5165–5170).

In terms of skin healing, research has shown that St. John's wort enhances the process while minimizing pain, making it a suitable option for helping to minimize the formation and ultimate appearance of scars. St. John's wort also has antifungal and antibacterial activity (Sources: Journal of Ethnopharmacology, October 2010, pages 511-521; and Journal of Alternative and Complementary Medicine, January 2010, pages 113-117).

«Back to Ingredient Dictionary

About the Experts

Paula Begoun is the best-selling author of 20 books on skin care and makeup. She is known worldwide as the Cosmetics Cop and creator of Paula's Choice. Paula's expertise has led to hundreds of appearances on national and international television including:

View Media Highlights

The Paula's Choice Research Team is dedicated to helping you sort through the myths and half-truths of the cosmetic industry. With their expert advice, you’ll have the facts you need to take the best possible care of your skin.

585630-IIS2 v1.0.0.411 8/30/2015 3:14:59 AM
Skip to Top of Page

Free Email Sign-Up

- Expert Skin Care & Makeup News & Advice (twice a month)
- New product reviews on Beautypedia (twice a month)

Birthday (Optional)



Paula’s Choice Auto Delivery is a quick and convenient way to make sure you never run out of your favorite products again. Just select the products you can’t live without, choose how often you’d like them delivered and we’ll take care of the rest.

FRIENDS & FAMILY   |   15% Off Everything + Free Shipping on $50+