2 forms studied
Does glucosamine help with joint pain?
Not on the evidence we can stand behind. Here is every form that has been studied for it, and what each one showed.
Form by form
Strongest first. Evidence for one salt or ester is not evidence for another, so each is rated on its own trials.
Glucosamine SulfateMixed
Trials used 1500–1500 mg · 5 studies · tested as crystalline glucosamine sulfate 1500 mg once daily — in the positive trials, specifically the Rotta preparation
Glucosamine HydrochlorideNo Benefit
Trials used 1500–1500 mg · 3 studies · tested as glucosamine hydrochloride 1500 mg daily, given as 500 mg three times a day