Homocysteine

Results

A homocysteine test measures the amount of the amino acid homocysteine in the blood.

Results are ready in 24 hours.

Normal

Normal values may vary from lab to lab.

Homocysteine

Normal:	0.54–2.3 mg/L	4–17 micromoles per liter (mcmol/L)

Many conditions can affect homocysteine levels. Your doctor will discuss any significant abnormal results with you in relation to your symptoms and medical history.

High values

High values of homocysteine may be caused by:

• Not getting enough folic acid, vitamin B6, or vitamin B12 in your diet.
• Other conditions or diseases, such as homocystinuria, kidney disease, hypothyroidism, Alzheimer's disease, or certain cancers.
• Using too much alcohol.
• Your sex. Homocysteine levels are normally higher in men than in women.
• Age. Homocysteine levels get higher as you get older.

Low values

Low values of homocysteine may be caused by some medicines or vitamins such as daily folic acid, vitamin B12, or niacin.

Go to previous section	Go to top of page	Go to next section
Author:	Robin Parks, MS	Last Updated: February 13, 2009
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine Brian Leber, MDCM, FRCPC - Hematology
© 1995-2009 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.