Oil Red O stain is widely used in various research and clinical settings: - Diagnosis of Metabolic Disorders: It helps in identifying lipid storage diseases and conditions like fatty liver disease. - Atherosclerosis Research: This stain is used to detect lipid-laden macrophages and foam cells in arterial plaques. - Liver Disease Studies: Oil Red O can highlight steatosis in liver biopsy samples. - Obesity and Diabetes Research: It is used to observe adipose tissue changes in animal models.