I love niacinamide products and this one did not dissapoint at all! Have used it for a month every day in my night routine and I love how my skin looks more healthy, bit glowy and even-toned. I have not seen a significant effect on my dark spots from acne scars, so I have to use it for a bit longer I think. I would definitely repurchase this serum as the amount of hydration is so good. I usually use half a pump for my face and neck area.