Hyaluronic acid is a polysaccharide (carbohydrate) that occurs naturally in the body. It exists in all mammals, and is identical in all species and tissues. Higher amounts of HA are found in the skin, vitreous body and connective tissues in the human body. Most important property of HA is its water binding capacity that furthermore gives structure to tissue and lubricates joints and muscles. HA also acts as a shock absorber in the weight bearing joints. Properties of Hyaluronic Acid: Moisturization properties: Formation of a barrier on the skin and high water binding capacity Wound healing properties: Normalization of cell migration and proliferation Mechanical effect: Lubrication, cushioning and shock absorption. Nutrient effect: Transport of essential nutrients from the bloodstream to living skin cells Pharmacological effect: Cell signaling (CD44 receptor)