Alleviates pain from backaches, arthritis, sore muscles and joints, sprains, strains, and bruises. There is some research that suggest the use of menthol for mild pain relief. Given the very low risk and very limited side effects, it is a great option for individuals seeking a complementary and off-the-shelf product for pain relief. Menthol is an organic compound and is made synthetically or obtained from mint oils. In the case of BioFreeze, the menthol makes up 4-10% of the product, depending on which specific product application you use. Menthol (along with wintergreen oil, eucalyptus oil, camphor, and turpentine oil) is known as a counterirritant.