I don’t have the original packaging but I never used it so the bottle is new and full!! In PM routine (Retinol Reform rest nights), apply Lactic Acid Serum after cleanser and toner, apply 1-2 pumps all over face and neck and smooth into skin, avoiding the eye area. Wait 5 minutes for product to absorb and follow with moisturizer. Be sure to apply SPF in the AM, as freshly exfoliated skin is more susceptible to sun. Not using retinol in your routine? Lactic Acid Serum can provide similar smoothing, brightening benefits. Incorporate it gradually into your routine, 1-2 times per week to start and use as often as your skin can tolerate.