Don't know what its for but it works for pain.
I bought this product after reading one of several books on peroxide therapy.  In reading the reviews, one customer stated that he used it for muscle and joint pain.  I had back surgery in 2012 and still suffer from time to time with muscle pain.  I put some of this on the spots that are aching and by the morning, the pain and the stiffness is gone.  Works even better with Bengay.
Rating: 5 stars