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