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Different glucosamine sulfate products generate different outcomes on osteoarthritis symptoms
  1. Jean-Yves L Reginster1,
  2. Olivier Bruyere2,
  3. Cyrus Cooper3,4
  1. 1Department of Public Health, Epidemiology and Health Economics, University of Liège, Liege, Belgium
  2. 2Department of Public Health and Epidemiology, University of Liege, Liege, Belgium
  3. 3MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
  4. 4NIHR Musculoskeletal Biomedical Research Unit, University of Oxford, Oxford, UK
  1. Correspondence to Professor Jean-Yves L Reginster; jyreginster{at}ulg.ac.be

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Runhaar and colleagues1 produced an elegant meta-analysis of various glucosamine-containing products in knee and hip osteoarthritis (OA), based on individual patient data (IPD). Although they were able to access and analyse only 5 out 21 eligible studies, their results are in agreement with most glucosamine meta-analyses in OA: glucosamine products other than prescription crystalline glucosamine sulfate are not effective in hip or knee OA pain and function.

Such results, as acknowledged by the Authors, had already been demonstrated in several previous and more comprehensive meta-analyses, including a dedicated Cochrane Review2 and a recent effort by Eriksen et al3 specifically investigating possible differences in efficacy among glucosamine products. Indeed, glucosamine exists in different forms for pharmaceutical use, as extensively reviewed by Altman.4 Among these, glucosamine hydrochloride (used in three out of …

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