Homocysteine – An elevated concentration of homocysteine is an independent risk factor for cardiovascular disease. When used in conjunction with methylmalonic acid (MMA), these tests are useful to diagnose and monitor vitamin B12 (cobalamin) and folic acid deficiency and are often useful in evaluating macrocytosis (an elevated MCV, an erythrocytic index).
SST, Serum. Volume 1 (0.5) mL. Stability: Ambient – 48 Hours, Refrigerated – 14 Days, Frozen – 2 Months