This oil-free, clear gel contains hyaluronic acid, a natural moisturizer, and vitamin B5, which helps draw the nutrients of the Cellex-C products into the skin. Apply 2-3 drops PRIOR to the application of the cream based Cellex-C, and AFTER when using the serum based products. Helps hydrate the underlying tissues beneath the skin for more radiant and healthy skin. Cellex-C Hydra 5-B is suitable for all skin types