HA4 Plus serum features a proprietary blend of four different forms of hyaluronic acid with different molecular weights which work synergistically to amplify the skin's hyaluronic acid levels. Hyaluronic acid is the most loved molecule by the dermatologists. It is able to hold up to 1000 times its molecular weight in water. Hyaluronic acid families of weights between 50 kDa and 3000 kDa. HA4 Plus serum is a blend of four different forms of Hyaluronic Acid with different molecular weight to pacify the need of different skin layers. The concept of giving a mixture of different size of HA molecules is to ensure that each layer of the skin is replenished. The bigger size molecules sit on the outer layer of the skin to provide instant hydration whereas the tiny sized molecules penetrate deeper to give a long lasting and stable hydration and also promotes collagen formation. The serum is also enriched with premium antioxidant and anti-ageing actives to give aa smooth and supple skin. It is easy to use at home that Keeps the skin hydrated for whole day. It also decreases the appearance of wrinkles & improves skin elasticity. Stays on epidermis tightly and penetrates skin to soften stratum corneum. Prevents water evaporation. Adhere firmly even after washing.