Abstract
Magnesium is effective in increasing the elimination of Sr89 by rats given the isotope either one or 30 days before treatment. It is effective both orally or parenterally. Oral administration of Mg decreases fecal Sr89; however, the sum of urinary and fecal Sr89 is significantly greater than that of control animals. Supplementation of Mg with citrate ions or Prednisolone was no more effective than Mg alone.