Bovine Serum Albumin (BSA) powder is used in laboratory settings to stabilize enzymes during reactions, enhance signals in immunoassays through non-specific binding, and as a protein standard. BSA is used as a diluent of primary and secondary antibodies for immunoassays and as a blocking agent, especially for detecting phosphorylated proteins as target antigen. The presence of BSA helps to maintain the integrity of other proteins by protecting against potential denaturation or degradation.