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Wolf, MD Lipid Metabolism Laboratory (Drs Schaefer, Bongard, and Lamon-Fava) and Dietary Assessment and Epidemiology Program (Dr Tucker), Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Department of Biostatistics, Boston University School of Public Health (Dr Beiser), and Department of Endocrinology, Nutrition, and Diabetes (Dr Robins) and Department of Neurology (Drs Au and Wolf), Boston University School of Medicine, Boston, Mass

doi: 10.1016/s1074-7613(02)00323-0 27 WarburgO

Glucosamine sulfate: The form most studied in human research

This happens because hyaluronic acid separates from collagen molecules, while collagen fibers clump together