Known for its outstanding moisture retaining ability and viscoelastic properties, HA has established itself as a leading ingredient in the cosmetic industry. The most effective, top selling creams, lotions, serums, shampoos, conditioners, bath oils, foundations, lipsticks and lip balms usually contain this amazing ingredient. Most HA Serums, however, are at least 99% water Making your own own fresh serums weekly will not only save you money, but also help you control what you put on your skin, and ultimately into your body. This product makes a luxurious anti-aging serum when combined with RESURRECTIONbeauty's L-Ascorbic Acid Powder (Vitamin C) and RESURRECTIONbeauty's Glycerin with Botanical Extracts. Put it all in our 1oz. So why do we offer High Molecular Weight HA instead of Low Molecular Weight HA High Molecular Weight HA has been shown less likely to cause skin reactions.