I have been using this product for some time now (over two weeks), what I can confidently say is a little goes a long way effectively. I use so little on a pimple. I have a habit of scratching pimples, then regret the scarring. Since using the Azulen Paste, I've managed to control the scratching and it also dries out pimples overnight. It lightens my marks as well. Very gentle on the skin, no irritation. I also use this now and then as a concealer under my foundation (on dark spots). Love using this product.