Methyl Salicylate (14%), Menthol (5%). Deep penetrating; fast acting. With natural castor oil base. Easy-of-use commendation. Ancient Wisdom: For 4,000 years, civilizations as far back as the early Egyptians relied on the natural properties of castor oil. Inspired by these properties, Castiva brings centuries of ancient wisdom to your fingertips. Pure Comfort: Our goal is to provide you with a product that meets the highest standards. Only the finest castor seeds are selected. During the purification process, the oil is cold pressed and double filtered. Castiva provides you with a natural odorless castor oil base of the highest quality. You can feel good about using Castiva to help you feel better. Arthritis; sprains; simple backache; strains. Feel the deep, cooling relief of Castiva Arthritis Pain Relief Lotion as you massage it into your skin. The unique blend of menthol and natural castor oil allows Castiva to work quickly and penetrate deeply. Castiva speeds cool, soothing relief of discomfort associated with joint and muscle pain so you can get on with your day. The Castiva Difference: So how does Castiva work and what makes it different than all the other products on the market? Castiva's natural castor oil base uses the latest in technology to allow the menthol and methyl salicylate to penetrate deeply and provide fast acting relief. Simply put, rather than lying on top of the skin, Castiva's technology helps the medicine get down into the skin.