I have used up two bottles, and it is much faster to lighten acne marks than using vitamin C essence. In summer, I wear short sleeves and my hands and arms are very tanned. I used this whitening essence to paint my hands, and my hands are several shades whiter than my arms after a week of application. . Someone said before that I don’t dare to apply it on my face. I apply a lot every time, but the most important thing is sunscreen. Otherwise, even if I use the whitening essence, the effect will not be very good.