no serum just liquid [SEP] yesterday i tried making a serum i used level tsp of the hyaluronic acid and oz of water this is a recipe i have used in the past it was only liquid so i added a little more lmwha to the mixture it is still liquid today the water was right out of the fridge and it was shaken in a bottle and i waited for the bubbles to go away today i will try the recipe given in the answered questions if it is any better i will change my stars made another batch this morning it also is just water no viscosity to it