I have used the entire bottle and saw no benefits from the product. Having used other Niacinamide, this just does not measure up. It also caused me to have little bumps on my forehead.

I used this on my partners dark spots, and personally, we didn't see a huge difference. Some pigmentation wore off but it didn't take the entire dark spot away, plus left a bit of a sticky residue.

Efficient if trying to get rid of dark spots! Has niacinamide which targets problem areas. If you are looking for a product to target dark spots, I recommend this!