I am almost finished a bottle. I have been using it alone after washing and drying my face. This product is easy to apply with fingertips and feels fine going on, until it dries. I am 62 years old. I did not notice improvement in wrinkles or sagging from the product. My face skin feels tougher, looks dry and feels dry. Perhaps i need to follow its application with a softening, brightening moisturiser. Perhaps i should have used it only on my neck, where i don't notice dryness, and used something else on my face.