Basic, but wouldn't repurchase

I got this serum for free in exchange for my honest review. The product comes in a glass bottle with a dropper. It is black, but it becomes transparent when applied on the skin. It has a pretty distinct smell, which I find pleasant. The serum is vegan and contains charcoal, AHA and BHA. I used it pretty regularly and noticed better skin texture and tone. Overall, I'm glad that I tried it, but I won't buy it again.