Vitamin Deficiency Test lab tests in DirectLabs Lab Test Test Cost Cardio IQ® Vitamin D, 25-Hydroxy, LC/MS/MS $99.00 Vitamin C $68.00 Vitamin K1 $99.00 Methylmalonic Acid (MMA), Serum - Methylmalonic Acid Test (Blood) $98.00 Vitamin B12 (Cobalamin) - Vitamin B12 Testing $34.00 Vitamin E, Serum - Vitamin E Blood Test $83.00 Intrinsic Factor Blocking Antibody, Serum $83.00 Vitamin D, 25 Hydroxy - Vitamin D Blood Test $49.00 Carotene $54.00 Vitamin B2 (Riboflavin), Plasma $76.00 Folate, RBC $69.00 Parietal Cell Antibody, ELISA $189.00 Vitamin B1 (Thiamine), Blood, LC/MS/MS - Thiamine Blood Test $64.00 Homocysteine - Homocysteine Test $69.00 Vitamin D, 1,25-Dihydroxy, LC/MS/MS (Calcitriol) - vitamin d test cost $97.00 Methylmalonic Acid (MMA), Urine - Methylmalonic Acid Urine Test $138.00 Vitamin B6 (Pyridoxine), Plasma $69.00 Vitamin B12 and Folic Acid (Folate) - Vitamin B12 deficiency blood test $54.00 QuestAssureD™ 25-Hydroxyvitamin D (D2, D3) $79.00 Vitamin B5 (Pantothenic Acid) $189.00 Vitamin B3 (Niacin) $189.00 Vitamin B12 Binding Capacity, Unsaturated (Transcobalamin) $99.00 Vitamin A (Retinol) - Vitamin A blood test $49.00 Folate, Serum - Folate Blood Test $44.00