I honestly haven't noticed the firming, just love how my skin looks and feels when I remove the peel. I can definitely tell the difference. My guess is there are many peels that do the same thing. The bottle isn't that big, but I am amazed at how many treatments I have gotten and I have only used half the bottle. You could try it and always send it back. I almost did return it, but I felt like I got such good results, that I should keep it. I do think my skin looks better with each use.