Glucosamine Sulfate
A naturally occurring amino sugar that serves as a building block for cartilage, tendons, and ligaments. One of the most studied joint health ingredients worldwide.
What the Research Shows
Reginster et al. GAIT (2001)
3-year RCT of 212 patients showed glucosamine sulfate significantly slowed joint space narrowing compared to placebo.
The Lancet
Towheed et al. Cochrane Review (2005)
Meta-analysis confirmed glucosamine sulfate was superior to placebo for pain and functional improvement.
Cochrane Database of Systematic Reviews
Bruyere et al. (2004)
Long-term follow-up showed 5 years of glucosamine use reduced knee replacement surgery need by 57%.
Archives of Internal Medicine
How It Works
Glucosamine stimulates chondrocytes (cartilage cells) to produce glycosaminoglycans and proteoglycans — the structural molecules that give cartilage its cushioning and shock-absorbing properties. It also inhibits cartilage-degrading enzymes like metalloproteinases, slowing the breakdown of joint tissue.
Recommended Dosage
Clinical Range
1,500 mg/day (typically in 3 × 500 mg doses)
In Kodlas Zero Products
1,500 mg per serving in FlexiCorPlus
Found In
⚠️ Medical Disclaimer
This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Clinical studies are referenced for informational context — individual results may vary. Always consult a qualified healthcare professional before starting any supplement.