Gain and Retain Skin Moisture Our highest-potency daily moisture booster!...Reviva Labs has now compounded a higher level of premium Hyaluronic Acid into a precious fluid that can help raise skin's moisture level to fill-in furrows, plump up tissues and tone-down age lines.Apply under creams. Or if using Reviva Labs Firming Fluid, apply over fluid. Ingredients: Demineralized spring water, glycerine (vegetable), hyaluronic acid, polysorbate 20, hydrolyzed mucopolysaccharides, green tea extract, hydroxyethylcellulose, simethicone, carmelized sugar, methylparaben, propylparaben.