title: A friend recommended I take a dietary supplement for my arthritis that contains glucosamine and chondroitin. What are these made from? Do they help?
mesh_terms: D001168:Arthritis / Q000188:drug therapy*; D002807:Chondroitin / Q000009:adverse effects / Q000627:therapeutic use*; D019587:Dietary Supplements; D004340:Drug Contamination; D005944:Glucosamine / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans
chemical_list: D002807:Chondroitin; D005944:Glucosamine