D.M.
Glucosamine & Chondroitin do work for "arthritis", but unfortunately, they are not absorbed very well when it's taken orally. It works best when it's injected into the actual site. Same goes for Hyaluronic Acid, which is a form of collagen the body naturally produces. So, you can take either product, but it won't work very well & takes at least 3-6 months to build up in the body before you see any results.
First, it is best to examine why your knees are sore. What is the root of the pain? Are you carrying excess weight? Do you have a diet high in animal products? Are you not feeling supported mentally/ emotionally? Did you have a past injury physically or past trauma that didn't heal properly? It really is best to get to the root & address all areas of body/mind to help the knees & overall health.
If you want further help, just call the office to make an appointment.
Dr. A.