Glucosamine Hydrochloride
The hydrochloride salt of glucosamine is a common glucosamine product, yet it has received relatively little attention from researchers (Table 3). Houpt et al.29 were unable to show statistically significant changes in the WOMAC pain score subset versus placebo after a short period of therapy with GH (8 weeks). All tested parameters tended to show improvement, and GH did significantly reduce the daily pain reported by patients (P = .018) and improved findings on clinical knee examination (P = .026). GH was shown to be as safe as placebo. Though failing to prove its primary outcome measure, this study suggested that GH benefited some patients with OA without the side effects of other treatment modalities. McAlindon et al.30 performed a 12-week GH study on 205 patients, recruited over the Internet. By use of the WOMAC as the primary outcome, GH was safe but no more effective than placebo in treating symptoms of knee arthritis
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