Homocysteine, Total

Method Name



Homocysteine, Total; Homocysteine, Blood, Homocysteine - Blood

Specimen Required

one SST/gel tube. Fasting specimen is preferred.

Specimen Minimum Volume

2.0 mL of blood

Specimen Stability Information

Must be separated immediately after collection. Stable for 7 days refrigerated.

Special Instructions

Plasma total homocysteine is a graded risk factor for cardiovascular disease. The risk increases progressively with homocysteine concentration. Maintenance of homocysteine levels below 15 umol/L is recommended. False elevation of plasma or serum homocysteine may occur if the plasma or serum is not promptly separated from the cells at the time of collection. Total homocysteine levels will increase with age, smoking, and many drugs.

Performing Laboratory

As ordered. Turn around time is 24 hours.

Reference Values

5.0 – 13.9 umol/L