Cellex-C Serum for Sensitive Skin contains 7.5% L-ascorbic acid, L-tyrosine, zinc and pine bark extract to regenerate connective tissue and collagen while protecting the skin from damage caused by free radicals and environmental harm. It boasts the ability to make skin look five to ten years younger by restoring youthful radiance, tone and elasticity while it reduces fine lines, wrinkles and other visible signs of aging.