Naf five star superflex five star superflex contains ingredients for the optimum nutritional support of joints sulphur is the essential building block of life and in its amino acid form represents a key constituent of healthy cell tissue cell regeneration requires regular supplies of sulphur to support of the natural healing process glucosamine and i glutamine are found as integral parts of the cartilage within the jointmany minor strains and traumas which are a part of everyday trai