Just picked up your thread about Callus Peeling. I would look at the ingredients if I were you as Mavex state "all ingredients are certified organic", which is weird as I was never aware that Sodium Hydroxide was an organic product!!!! I thought I would just try this product because of all its claims, BUT be aware of Callus Peeling, as I tested it on my feet, before using on my clients, and it burnt my skin - my skin was left red and sore, where the patch had been, for days. I've always used Callus Peel on myself and my clients for years and NEVER had any problems at all so am sticking to Callus Peel as the service has been excellent!!!