Beta-2 microglobulin is a protein found on the surface of most cells. Blood levels rise when the immune system is activated or when kidney filtration is impaired.
Category: Inflammation & Immune
Also known as: beta-2 microglobulin, b2m, beta 2 microglobulin, b2 microglobulin, β2-microglobulin
Reference range: 0.7–1.8 mg/L (Source: ABIM)
Standard unit: mg/L
High values may indicate
High beta-2 microglobulin levels may indicate kidney disease, multiple myeloma, lymphoma, leukemia, or chronic inflammatory conditions.
Low values may indicate
Low beta-2 microglobulin levels are generally not clinically significant and are considered normal.