Toskani TKN HA 3 (1x1.6ml)TKN HA 3 is a second generation non cross linked Hyaluronic Acid skin booster Hyaluronic Acid is a very versatile molecule which can hold up to 1000 times its own molecular weight in water which makes it ideal for adding hydration to the skin. This results in a plumper, more youthful looking complexion. It also stimulates collagen and elastin production within the skin which are the building blocks of the skin giving it more elasticity. Finally it