Texture: a little bit sticky even once it dries down, but it's hardly noticeable

Fragrance: light citrus scent

Effects: I used this for lightening hyperpigmentation and it works wonderfully. Some of my facial PIH looked noticeably lighter after a few uses (or maybe that's just my imagination?); however, I know that this definitely works because I've also been applying some to a very red mark on my ankle from a small 4-month-old wound. The mark was incredibly stubborn and the darkest/reddest mark I've ever had--my legs look for any reason to get hyperpigmentation--but it finally began to fade after using C20 on it twice a day after a few weeks. After about 1 month, the spot has faded from red to a light brown.

Unfortunately, after about two weeks of use, I started to get closed comedones on my cheeks from the C20 serum, so I've stopped using it on my face. Personally, I think my face is just sensitive to products that are maybe too rich/thick; I'm considering testing this out on my face again, but with less moisturizers in my routine. I'll continue to use this on any PIH I get on my body, though.