Compare l-Tyrosine $32.00 Add to cart Compare Vitamin A $11.60 Add to cart Compare D-Dimer Quantitative blood test (500690) $150.00 Add to cart Compare RPR w/reflex tp TrepSure (syphilis) blood test (006026) $12.25 Add to cart Compare Free T4 Blood Test (002974) $10.50 Add to cart Compare G6PD, Quant, Blood and red cell count blood test (001917) $40.11 Add to cart Compare Fatty Acids, Free (Non-esterified) Blood Test (081893) $63.00 Add to cart Compare Calcitriol (1, 25 di-OH Vit D) blood test (081091) $75.00 Add to cart Compare Apo-B lipoprotein Blood Test (167015) $42.52 Add to cart Compare CA 27.29 Blood Test (140293) $26.40 Add to cart Compare Carbohydrate Antigen (CA) 19-9 Blood Test (002261) $87.88 Add to cart Compare Varicella Zoster Virus Ab, IgG only Blood Test (096206) $19.25 Add to cart