The perfect elixir for aging, sun damaged skin. This Vitamin C serum is a concentrated delivery system for the highest form of active, bio-available Vitamin C. The vitamin C in our serum formulation is Stay C 50, a stabilized (phosphorylated) sodium salt of L-ascorbic acid. The esterification of ascorbic acid protects vitamin C from destruction by oxidation. The result is a stable, highly effective Vitamin C - combined with the superior moisturizing power of botanically derived hyaluronic acid and natural jojoba oil, the tightening and moisture retention power of Witch Hazel, along with the collagen production boosting properties of the amino acid Arginine. This serum works wonders to repair the effects of sun damage, lighten sun and age spots, smooth and brighten for a more beautiful skin. You will love this serum!