Our best selling serum is developed with hyaluronic acid, one particular the most effective hydrating as well as moisturizing ingredients available nowadays. Holds as many as 1000 times its weight in water! We are using a 1 % formula, which is twice the quantity of hyaluronic acid that is utilized in some other formulas. Application: Apply 2-3 drops to fingertips and smooth onto cleansed skin morning and night. For external use only.