Super product. Absorbs well and no stickiness afterwards. Leave your skin more hydrated. There is no fragrance, which is hard to find these days but a blessing when you do find it, for those with sensitive skin and allergies. I honestly can’t tell there is a big difference between the collagen and hydration, but both definitely do hydrate. One bottle, used twice a day, about 5 drops each time, lasts me a little over a month. It will probably go longer if you use less but the older you get, the more you tend to slather on a good product. Lol, since it says collagen, I do use that one at night and hydration in the day. I know the collagen production decreases with age, especially after 40, BUT a small part of me want to think it helps a tiny bit. :) Cant Hurt.