Form of vitamin C that is a potent antioxidant and skin-soothing agent and can improve the appearance of signs of aging and help brighten an uneven skin tone. L-ascorbic acid is often labelled as the INCI complaint “ascorbic acid” on ingredient lists, but there is no difference between the two—they refer to the same ingredient.
References for this information:
Indian Dermatology Online Journal, 2013, issue 2, pages 143-146
Dermatological Surgery, 2005, issue 7 part 2, pages 814-818
Dermatological Surgery, 2001, issue 2, pages 137-142