Each Anti-Oxidant on its own, is a powerful healer to skin blemishes & anti-aging. However, when combined the anti-oxidants work in unison, delivering the desired results much quicker. Apart from this, Vitamin C (L-Ascorbic acid) is unstable in solution, Ferulic Acid & Vitamin E provides the stability required for Vitamin C to have a longer shelf life and remain effective for longer.
Studies show the effect of each Antioxidant on its own, and when these ingredients are combined to the ultimate formulation of Vitamin C, E & Ferulic Acid. Ferulic acid alone absorbs some UV and therefore is itself a weak sunscreen. Topical application has been shown to protect the skin from UVB-induced erythema. When mixed with vitamin C and vitamin E, ferulic acid stabilizes the formulation and acts synergistically to double the photoprotection from fourfold to eightfold [Karen E. Burke, in Skin Aging Handbook, 2009]