Educational information only. At Precursor, blood testing is requested and reviewed by a clinician and considered alongside your history and other markers, not as a stand-alone diagnosis. Testing is performed in NATA-accredited laboratories to ISO 15189 standards.
What is homocysteine?
Homocysteine is an amino acid produced as a normal by-product of the body's methylation processes. Your body clears it with the help of B vitamins, particularly folate, vitamin B12 and vitamin B6. When those are in short supply, or when certain genetic and kidney factors are present, homocysteine can accumulate in the blood.
Why it matters
Raised homocysteine has been associated with cardiovascular risk and is also a practical marker of B-vitamin status. Because low B12 or folate is a common and correctable cause, an elevated result often points toward a straightforward nutritional avenue worth exploring with your clinician.
What your results can mean
Higher than optimal
Elevated homocysteine frequently reflects low folate or vitamin B12, reduced kidney clearance, or genetic variation in how it is processed. It is usually interpreted together with your B-vitamin levels to find the likely cause.
Within the healthy range
A normal homocysteine suggests your methylation and B-vitamin pathways are working well, and that this particular contributor to cardiovascular risk is not raised.
Reference ranges in Australia
Homocysteine is reported in micromoles per litre (µmol/L). As a general guide, values below about 15 µmol/L are often considered within range, though optimal targets may be lower. Read your result against the range on your own report and alongside your B12 and folate.
Test your homocysteine with Precursor
Homocysteine is best read together with your B-vitamin status. At Precursor it can be assessed alongside Full Advanced Bloods, a single clinician-reviewed blood draw covering your heart, metabolic, hormonal, kidney, liver, thyroid and nutrient markers together, so any nutritional cause can be seen and acted on in context.
