I initially received this item in two small sample packets from previous orders on this site, and a little goes a long way! My skin has recently acquired a bumpy texture with occasional whiteheads and lots of closed comodones due to an allergic reaction. I was wanted to clear up my face as soon as possible and this product has saved my skin! I was able to quickly introduce the AHA into my skincare routine and was using it 2-3 times a week from the start. My skin is very sensitive and not very acne-prone but I can see a reduction in the amount of whiteheads I get. My face feels much more smooth and all of my closed comodones are gone! I ordered the full size right before I used up all of the last sample.