Compound or practice · Supplement
Glucosamine
A joint mainstay with genuinely divided evidence — modest benefit at best, and a surprising cardiovascular-mortality observational signal in its favor.
- Overall grade
- Grade C
- Last revised
- 2
- graded outcomes
- 0
- references listed
A structured monograph in Prometheus's bundled library. Its grades are the monograph's own reading of the evidence, not a peer-reviewed review.
3 at grade C — 3 graded rows
What is known
Each outcome with its grade (how strong the evidence is, A to D), the size of the effect where the entry records one, and how often studies agree.
- Osteoarthritis painEvidence grade C
Split trials
Smallmixed
- Cardiovascular mortality (observational)Evidence grade C
Association only
Unclearmixed
Conditions
How the entry reads its effect on diagnosed conditions: the direction first, then the grade. Never a substitute for the person who treats you.
- Osteoarthritis May improveEvidence grade CTrial for 8–12 weeksGrade C
What is uncertain
Read off the same rows as above. Nothing here is added that the entry does not itself record.
- Thin evidence: Osteoarthritis pain (grade C); Cardiovascular mortality (observational) (grade C).
The evidence in words
What it is
Glucosamine is an amino-sugar building block of cartilage, sold as sulfate or hydrochloride for osteoarthritis.
How it works
It provides cartilage-matrix substrate and may have anti-inflammatory signaling effects; the mechanism has never cleanly matched the clinical results.
What the evidence shows
Osteoarthritis trials are famously split — industry-funded studies of glucosamine sulfate show modest pain relief; large independent trials (GAIT) were largely null. Intriguingly, large observational cohorts link habitual glucosamine use to lower cardiovascular and all-cause mortality, a hypothesis-generating signal, not proof.
How to use it
1,500 mg/day glucosamine sulfate, often with chondroitin; give it 8–12 weeks before judging.
Safety & interactions
Well tolerated; mild GI effects. Older warnings about glucose control appear overstated.
Bottom line
Worth an 8–12 week trial for knee OA at 1,500 mg glucosamine sulfate — some get real relief, many don't. The mortality association is interesting but unproven.
How it is used
As the entry records it, from the studies it summarises. Not a recommendation for you — doses that suit a trial population may not suit you.
- Standard
- 1,500 mg/day sulfate, ± chondroitin.
Related reading
Entries that share this one's tags or conditions.
- Glucosamine for OsteoarthritisEvidence grade C — Trial for 8–12 weeksEvidence grade C
- BoswelliaAn anti-inflammatory resin with some of the better osteoarthritis-pain data among botanicals.Evidence grade B
- Boswellia for OsteoarthritisEvidence grade B — Reasonable RCT supportEvidence grade B
- ChondroitinGlucosamine's usual partner — similarly modest and contested for osteoarthritis.Evidence grade C
Sources
This entry lists no references of its own.
Last revised . A grade is this entry's reading of the evidence, not medical advice.