The first time I found out about this product was from someThinc X Doctor Zie's live broadcast. he claims to be able to fade acne scars, black spots, scars, even out skin tone, & brighten. I bought the 5% for the first time try and use it, and it really has a little effect on my face. My PIH acne scars are really fading, for PIE acne scars it's very difficult to only slightly reduce the redness. what I like the most is the brightening effect which is true and proven to be real haha