The BMJ study was observational - it can't establish cause. And it did not include detailed information on glucosamine dose or duration of use. Glucosamine was associated with a 9%-22% lower risk ...

Glucosamine sulfate is typically taken once daily in a dose of 1,500 mg. If this upsets your stomach, spread it out over 3 doses of 500 mg each. Like glucosamine, chondroitin is a building block ...

Methods: Subjects were randomly supplemented with either glucosamine (G) (n=24) or placebo (P) (lactose) (n=22) for 12 weeks at a dose of 2000 mg per day. Over this period, four testing sessions were ...