This dynamic anti-aging day and night serum duo contains stabilized vitamin C (for day) and vitamin A (for night) to brighten, tighten and tone the skin as it reduces the look of large pores. Marine Collagen and assorted peptides smooth out lines and wrinkles. Prozymex HBT, the newest advance in skincare delivery systems, tops off the duo formulations. This serum set "truly works" and is available for either dry or oily skin types.