I've been taking Glucosamine for the past couple of years, and while I doubt that it works, I've been keeping at it as you're supposed to have to take it for 3 years before it is effective. On a recent trip to Singapore, I was told that the form of glucosamine sold in the US is largely a scam. There is only one form of glucosamine that works, and that is crystalline glucosamine sulphate. Glucosamine Hydrochloride has never been shown to be better than a placebo. It seems that glucosamine sulphate is regulated as a drug in Europe, and hence any you buy from Europe needs to meet purity and dosage standards.
Even a quick search of the US National Library of Medicine I found:
Glucosamine Sulfate - likely effective for osteoarthritis
However,
Glucosamine Hydrochloride - insufficient evidence to rate effectiveness
Crystalline glucosamine sulfate in the management of knee osteoarthritis: efficacy, safety, and pharmacokinetic properties
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3400104/
Glucosamine sulphate is highly unstable, and the stable version, crystalline glucosamine sulphate is patented by an Italian company Rotta Pharm.
Yesterday, when I got home I threw away all the glucosamine I've bought from Costco and etc. and have bought proper crystalline glucosamine sulphate manufactured by RottaPharm. Hopefully, my knees get better!
Even a quick search of the US National Library of Medicine I found:
Glucosamine Sulfate - likely effective for osteoarthritis
However,
Glucosamine Hydrochloride - insufficient evidence to rate effectiveness
Some products in the US that are labeled glucosamine sulfate are actually glucosamine hydrochloride with added sulfate. This product will likely have different effects than one which contains glucosamine sulfate.
Crystalline glucosamine sulfate in the management of knee osteoarthritis: efficacy, safety, and pharmacokinetic properties
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3400104/
Continuous administration for up to 3 years resulted in significant reduction in the progression of joint structure changes compared with placebo as assessed by measuring radiologic joint space narrowing (structure-modifying effect). The two effects combined may suggest a disease-modifying effect that was postulated based on an observed decrease in the risk of undergoing total joint replacement in the follow up of patients receiving the product for at least 12 months in the pivotal trials.
Glucosamine sulphate is highly unstable, and the stable version, crystalline glucosamine sulphate is patented by an Italian company Rotta Pharm.
Yesterday, when I got home I threw away all the glucosamine I've bought from Costco and etc. and have bought proper crystalline glucosamine sulphate manufactured by RottaPharm. Hopefully, my knees get better!