10.22376/ijpbs.2019.10.1.p1-12 Volume 1 Issue 2 2010 (April - June) The objective of this study was to assess the toxic effects of Oxy powder® in-vitro on four pathogenic microbes and a probiotic bacterium generally present in the human GI tract and to determine acute oral toxicity (LD50) profile of Oxy Powder® in Sprague Dawley rats. The results shall be used in selecting doses in repeated dose toxicity study of Oxy Powder.  Jogender K. Lalla,Lalla,Meena U. Shah,Edward F. III Group GHC’s Oxy Powder®, Dietary supplement – In vitro Toxicity to Microbes – Acute oral (LD50) Toxicity in Sprague Dawley Rats. -