I used this for over 2 months but I didn't notice any difference, my scars didn't fade and my blackheads didn't improve. It felt itchy which is common in exfoliating skincare products, but it was also very sticky. It stung when I applied it on certain areas. It might work for some people but it didn't work for me. If you do try this serum, be sure to apply lots of sun protection as it can make your skin very photosensitive.