text: This is the most wonderful addition to my skin care routine. Why did I not know about this before???!!! Just be very careful and only leave on for 1-2 minutes as instructed or you will burn your skin. It's best to start with the 30% if you've never used something like this before. That level is nice and gentle but will provide results. My skin is much more elastic, my age spots and freckles are fading BIG TIME and fine lines are improved. This stuff WORKS and doesn't contain harsh chemicals. Love, love, love it.