Normal values for serum C3 complement vary depending on the method of testing. For example, the normal range of the one-way immunodiffusion assay is 1.14±0.27 g/L, while the normal range of the immunoscattering turbidimetric assay is 0.7-1.28 g/L. Serum C3 Complement can be used to assist in the clinical diagnosis of illnesses and the determination of medical conditions. For example, elevated C3 levels are mainly seen in the early stages of inflammation and infection, common diseases include myocarditis, arthritis, etc., while decreased C3 levels are usually seen in the early stages of inflammation and infection. Decrease in C3 level can be seen in the reduction of synthesis, excessive loss followed by excessive consumption, such as cirrhosis, chronic hepatitis, glomerulonephritis, systemic lupus erythematosus, and so on.