Each ampule is enough for two uses so I stored in a cool place and used AM and PM.
Skin was immediately smoother, allowing extra hydration [moisturiser etc] to glide on and absorb easily.
After seven days, skin was hydrated and plump which is what I set out to achieve.
To be honest, I didn't notice a difference in the fine lines around my eyes but the faint 11s between my eyes seem much less noticeable as did cheek pores.
If your skin is normal/dry, I think this will work for you also. For reference, I'm 30.