when you choose the cellex-c 2-step starter kit, advanced-c serum, skin hydration complex, 1 kit is all that is needed to be on your way to dramatically diminish the signs of photo-aging. Defy your years and unveil the youthful complexion you desire with this revolutionary oil-free duo begin the simple two-step process by applying advanced-c serum to the face and neck. The serum is formulated with natural collagen protection and powerful hydrolyzed l-ascorbic acid. Effective anti-oxidants fight the free radicals known to cause premature aging. apply the skin hydration complex next for increased absorption of vitamin c. This clear gel contains potent hyaluronic acid, a strong humectant that plumps and hydrates the skin, imparting a youthful look and feel to the skin. ideal for any skin type, your starter kit will work to encourage collagen production and increase cell turnover. The result is superior skin-plumping hydration and visible reduction in aging signs as well as overall improved texture and tone.