For quantitative determination of reduced/oxidized glutathione (GSH/GSSG) and evaluation of drug effects on their metabolism. Key Features: Sensitive and accurate. Linear detection range 0.01-3 µ M GSH equivalents with a detection limit of 10 nM GSH equivalents. Method: OD412nm. Samples: Whole blood, plasma, serum, urine, tissue and cell extracts. Species: All. Procedure: Assay takes 20 min. Kit size: 100 tests. Detection limit: 10 nM.