I was so excited to try out this #3 serum so I got it as a sample bottle and just one time use, my skin felt so hydrated. I then ordered for the 50ml jar and once it arrived, I used it in the morning and at night. My skin is oily in the T-zone areas and dry around my temples and cheeks so this serum balanced everything out. For a 40+ years old woman, my skin has that nice glossy sheen again as when I was 20+years old after using it for a month. Just truly amazing!!!