Lactate Dehydrogenase Activity Assay Kit (WST-8) is widely used in biomedical research for assessing cell viability and cytotoxicity Originating from studies of cellular metabolism this assay targets the lactate dehydrogenase enzyme which plays a crucial role in the conversion of lactate to pyruvate through the glycolytic pathway The WST-8 compound produces a water-soluble formazan dye upon reduction by NADH reflecting enzyme activity It is commonly employed in in vitro assays with nanomolar to low micromolar sensitivity allowing precise measurement of cell damage or death Typical applications include use in various cell models animal studies and drug screening assays The assay is valuable for evaluating drug-induced cytotoxicity testing cell proliferation and examining metabolic activity Experimental concentrations typically depend on the specific research design ensuring flexibility and adaptability to diverse experimental setups