It. And says it lasts 3-4 weeks. I thought it was interesting, in my little hick, backwoods space in the world someone knew about the Iver protocol, and also is taking another horse med for arthritic pain. I'm sorry I can't remember the name. I asked him to get me a bottle. He owns the ranch next to me, with horses and donkeys. Just fascinated that I guess my little pea brain thinks, I'm the only one who knows about this stuff, and then... Here he not only knows, but knows about something else for arthritis!