Two main forms of glucosamine dominate the market: sulfate and hydrochloride.
Glucosamine Sulfate
- Most widely researched form
- Contains sulfur, which supports cartilage repair
- Standard daily dose: 1500 mg
- Preferred in clinical studies for joint health support
Glucosamine Hydrochloride (HCl)
- More concentrated per serving
- No added sulfur
- Often used in lower-dosage formulations
- Research supporting joint benefits is less extensive
For most users seeking joint support, glucosamine sulfate remains the top choice due to stronger clinical backing and well-documented effectiveness.