Spirit Blue Agar is used with Lipase Reagent or other lipid sources for detecting, isolating, and enumerating lipolytic microorganisms. Spirit Blue Agar is recommended for testing milk and dairy products. Casein Hydrolysate provides amino acids, peptides, carbohydrates, vitamins, and minerals. Yeast Extract is a source of B-complex vitamins. Spirit Blue is a dye that serves as indicator of lipolysis. Agar is the gelifying agent.