This is a long-term, randomized, placebo-controlled, double blind clinical study of a nutritional supplement, ProStat 64, in chronic hemodialysis patients with poor nutrition. Subjects receive either ProStat 64 or Placebo for three months. At the end of this period, all subjects will receive ProStat-64 for a further 3 months at which time the study is ended. Parameters of nutritional status (lean body mass and serum protein) will be collected at baseline, 3 months and 6 months.