bloodwork
Homocysteine

A homocysteine test measures the amount of homocysteine in a sample of your blood. Homocysteine is an amino acid. Amino acids are molecules that your body uses to make proteins.

A homocysteine test is most often used to measure your vitamin B6, B12, and folic acid levels. Because these three vitamins break down homocysteine, not having enough of any of them can cause homocysteine levels to increase.

Source: MedlinePlus, U.S. National Library of Medicine

Normal range

515umol/L →normal
Normal
5–15 umol/L

Ranges from American Board of Internal Medicine (Laboratory Test Reference Ranges).

All 175 source ranges
SourceSexAgeRange
American Board of Internal Medicine (Laboratory Test Reference Ranges) All all ages 5–15 umol/L
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.1–8.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.2–9.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.2–8.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.3–9.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.2–8.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.3–9.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.2–8.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.3–9.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.3–8.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.4–9.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.4–8.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.5–9.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.5–8.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.6–9.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.5–8.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.7–9.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.6–8.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.8–9.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.7–8.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.9–9.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.8–8.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.1–9.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.9–8.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.3–9.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 3.9–8.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–9.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 4–8.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.6–9.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.1–8.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.8–9.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.2–8.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 5–9.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.2–9.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.2–9.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.3–9.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.4–10
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.3–9.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.6–10.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–9.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.7–10.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–9.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.9–10.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–9.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 6–10.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–9.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.1–10.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–10.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.2–11
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–10.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.2–11.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–10.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.3–11.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–10.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.3–11.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.3–10.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–11.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.3–11
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–11.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.3–11.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–11.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.3–11.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–11.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–11.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–12.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–11.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–12.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.4–11.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–12.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.5–12.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–12.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.5–12.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–12.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.6–12.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–12.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.6–12.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–12.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.7–12.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–13.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.7–12.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–13.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.8–13
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.5–13.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.8–13.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.5–13.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.8–13.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.5–13.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.9–13.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.6–13.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.9–13.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.6–14
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.9–13.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.6–14.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.9–14
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.7–14.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 4.9–14.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.7–14.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 5–14.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.8–14.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 5–14.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.8–14.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 5–14.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.8–15
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.1–14.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.8–15.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.1–14.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–15.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.1–14.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–15.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.2–14.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–15.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.2–15
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–15.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.3–15
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–15.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.3–15.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–15.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.3–15.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.4–15.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.4–15.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–16.1
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.4–15.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 7–16.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.5–15.4
Mayo Clinic Laboratories (Test Catalog) Male all ages 7–16.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.5–15.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 7–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.6–15.5
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.1–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.6–15.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.1–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.7–15.6
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.1–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.7–15.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.2–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.8–15.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.2–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 5.9–15.7
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.2–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6–15.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.1–15.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.2–15.8
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.3–15.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.4–15.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.5–15.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.6–15.9
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.7–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.4–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.8–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.4–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 6.9–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.5–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 7–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.5–16.3
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.1–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.7–16.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.2–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.8–16.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.2–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.9–16.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 8–16.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.3–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 8.2–16.2
Mayo Clinic Laboratories (Test Catalog) Male all ages 7.4–16
Mayo Clinic Laboratories (Test Catalog) Male all ages 8.3–16.2

What moves it

RecommendationWhenEvidenceSource
Folate — address deficiency Low National Institutes of Health - Office of Dietary Supplements
Vitamin b12 — address deficiency Low National Institutes of Health - Office of Dietary Supplements

What an abnormal result can be associated with

A high result
Hyperhomocystinemia

Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.

Details

Sample
Serum or plasma · LOINC
Collection
Serum gel tube · 1 mL · Mayo Clinic Laboratories (Test Catalog)
Part of
Amino acids panel · Bryan Johnson Blueprint
Listed under
B Vitamins · Folic Acid
Code
LOINC 13965-9 · umol/L
Also known as
Heart Disease, HCY, Homocyst(e)ine, Hcyst, Hcys