I've been looking for a natural way to control back pain for years. I have chronic back spasms related to an injury I sustained at work nine years ago. Narcotics are just a bad idea and OTC's have their problems too. These capsules are the perfect remedy. Two of these when that familiar twinging starts and within half an hour I'm good to go. Thank you so much for the little miracle in a bottle. I'm pain free, clear headed and very, very happy. Great product!