Chondroitin, glucosamine as well as hyaluronic acid are important substances for the constitution and the preservation of the tissue structures of the movement apparatus. Bones, cartilages as well as the synovial liquid depend on the supply of these nutrients. In case the body cannot produce enough of these substances, the synovial liquid becomes thinner and more watery. The joints thereby are conditioned by the absence of lubricant and become more susceptible to wear. The body ordinarily produces sufficient amounts of these substances. Nevertheless while the age is increasing, the glucosamine production is decreasing. As a consequence, the joints dry up and become more susceptible to overloading.

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