No Serum, Just Liquid [SEP] Yesterday I tried making a serum.  I used 1 level tsp of the hyaluronic acid and 3.4 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