A homocysteine test measures the amount of the Reference amino acid Opens New Window homocysteine in the blood.
Results are ready in 24 hours.
The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what’s normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.
Many conditions can affect homocysteine levels. Your doctor will discuss any significant abnormal results with you in relation to your symptoms and past health.
High values of homocysteine may be caused by:
- Not getting enough Reference folic acid Opens New Window, vitamin B6, or Reference vitamin B12 Opens New Window in your diet.
- Other conditions or diseases, such as Reference homocystinuria, kidney disease, Reference hypothyroidism Opens New Window, Reference Alzheimer's disease Opens New Window, 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 of homocysteine may be caused by some medicines or vitamins such as daily folic acid, vitamin B12, or niacin.
|By:||Reference Healthwise Staff||Last Revised: Reference January 27, 2011|
|Medical Review:||Reference E. Gregory Thompson, MD - Internal Medicine
Reference George Philippides, MD - Cardiology