Ingredients:15 Percent Vitamin C: Visibly evens tone and firms and defends against aging freeradical damage. Ferulic Acid: Fights discoloration and stabilizes vitamin C. Ergothioneine: Visibly improves uneven tone and boosts vitamin C's efficacy. Ferulic acid helps fight against discoloration while ergothioneine improves efficacy and uneven tone for radiant, youthfullooking skin. It is clinically shown to boost glow and reduce the look of wrinkles in as few as 15 minutes. Clinical Results:In an independent clinical study with 30 subjects in 12 weeks, results based on twice daily usage included:Clinically shown to boost glow in 15 minutesClinically shown to visibly brighten and improve radiance and wrinklesIn a selfassessment from an independent clinical trial with 30 subjects, after 12 weeks:100% agree it feels nonirritating on skin. Dermstore has partnered with Flex to allow you to use your Health Savings Account (HSA) or Flexible Spending Account (FSA). This means you can now use your HSA or FSA debit card to buy Paula's Choice products with pre-tax dollars, resulting in net savings of 30-40%, depending on your tax bracket. Eligible for HSA/FSA with a letter of medical necessity at checkout. From dermatologist-recommended treatments to solutions for chronic skin conditions like acne, eczema, and rosacea, these products are both effective and eligible. | Paula's Choice C15 Super Booster, 20 ml | Dermstore