The principal ingredient is Methyl Salicylate, which has been around forever/
Active Ingredients:
Methyl Salicylate 10%
Inactive Ingredients:
Aqua (deionized water), arnica montana (arnica) extract, boswellia serrata extract, cetearyl olivate, cetyl alcohol, dimethyl sulfone (MSM), ethylhexylglycerin, glycerin, glyceryl stearate, PEG-100 stearate, phenoxyethanol, polysorbate-20, resveratrol, sodium laurylglucosides hydroxypropylsulfonate, sorbitan olivate, stearic acid
Methyl salicylate - Wikipedia
I think if it works for you, fine, but I don't think it's worth the steep price.
These are the ingredients in BenGay which is really
much cheaper.
Ultra Strength BENGAY Pain Relieving Cream
Active ingredients Purpose
Camphor 4% Topical analgesic
Menthol 10% Topical analgesic
Methyl salicylate 30% Topical analgesic
Regards, ElaineD