_edited.png)
Elevated Homocysteine
High homocysteine signals strain in methylation and B vitamin status, and it is linked to vascular and brain health. We find why it is high and bring it into balance.
What you may be noticing
A lab test showed high homocysteine. You may have fatigue, brain fog, numbness or tingling, or mood changes, or you may feel well and want to know why the number matters.
Why it is rarely one thing
Homocysteine is an amino acid made during methylation. Normally the body recycles it back to methionine using folate and B12, or using betaine through a second pathway, or converts it with B6 into cysteine and then glutathione, a key detoxification molecule. When those pathways are short on nutrients, homocysteine builds up.
Elevated homocysteine is associated with vascular disease, stroke, cognitive decline, and pregnancy complications. It reflects several possible drivers: low B12 from poor absorption or plant-based diets, low folate, MTHFR, BHMT, and related variants, low kidney function, an underactive thyroid, certain medications such as metformin and acid blockers, and alcohol. In my sequence the gut comes first, because stomach acid and a healthy gut lining determine whether B12 and folate reach your cells at all. Not only a gene, but a nutrient, digestion, and metabolic signal.
Patterns we look for
- B12, methylmalonic acid, folate, and B6 status.
- Absorption: stomach acid, gut health, and medications that block absorption.
- MTHFR, BHMT, and related variants, interpreted in context.
- Choline and betaine intake.
- Kidney function.
- Thyroid function.
- Alcohol intake and toxic burden that draw on glutathione.
- Vascular health, blood pressure, and advanced lipids.
- Cognitive changes and nerve symptoms.
How I evaluate it
The comprehensive functional neurological exam assesses sensation, vibration sense, reflexes, balance, and cognitive processing, which can reflect B12 deficiency.
Homocysteine is part of the baseline panel I run for new patients. Functional labs may include B12, methylmalonic acid, folate, a complete blood count, kidney function, a thyroid panel, intracellular micronutrient testing, and advanced lipids to place homocysteine within your overall vascular risk.
How we address it
- Identify the driver: nutrient deficiency, absorption, kidney, thyroid, or medications.
- Restore digestion and absorption first where needed.
- Replenish B12, folate, and B6 in forms matched to your labs and absorption, choosing the B12 form by how your nervous system tolerates it.
- Support the betaine pathway with foods such as beets, spinach, and whole grains you tolerate.
- Review medications that lower B12 with your prescriber; never stop one on your own.
- Reduce alcohol and toxic burden, and support overall vascular health.
- Retest to confirm homocysteine is coming down.
Homocysteine often responds well within a few months once the right nutrients are in place. Rechecking it is a simple, objective way to confirm the plan is working.
B12 deficiency deserves special attention because it can damage nerves and the brain, sometimes before anemia appears. Numbness, tingling, balance problems, memory changes, and low mood can all reflect low B12. People over fifty, those taking metformin or acid-suppressing medication, and those following plant-based diets benefit from checking both B12 and methylmalonic acid.
Pregnancy planning is another reason to check homocysteine and folate in advance. Bringing homocysteine into balance supports your vessels, brain, and energy together.
Book your Comprehensive Functional Medicine Eval/Neurological Exam today to discover what the contributing root causes are that are underlying your health concerns.