Last reviewed: May 12, 2026 Last updated: May 12, 2026

Written by: Jay Hastings , CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

This article is part of the PlexusDx Education Hub — your resource for evidence-based guidance on brain & cognitive health. Browse all Brain & Cognitive Health education

Migraine is not simply a bad headache. It is a complex neurological condition involving waves of altered brain activity, changes in blood vessel tone, and heightened sensitivity to light, sound, and movement. It also runs in families. If one or both of your parents had migraine, your own odds are substantially higher, and researchers have spent decades mapping the specific genes behind that inheritance.

The short answer: migraine is highly heritable

Twin and family studies estimate migraine heritability at roughly 40 to 60 percent, meaning a large share of individual risk traces to inherited variation. Most migraine is polygenic, driven by many common variants that each add a small amount of risk. A smaller number of families carry rare, high-impact variants that cause distinct inherited migraine syndromes. Both patterns tell the same story: the migraine-prone brain is wired for greater excitability.

Ion channels and cortical excitability

Some of the clearest genetic evidence comes from familial hemiplegic migraine, a rare inherited form that causes temporary weakness on one side of the body during attacks. Variants in CACNA1A, which encodes a calcium channel that governs how neurons release signaling chemicals, are a leading cause. When this channel misbehaves, neurons fire too easily and are slower to settle, lowering the threshold for cortical spreading depression, the wave of electrical activity thought to trigger aura.

Related genes, including ATP1A2 and SCN1A, affect the same balance of ion flow across nerve membranes. Together they illustrate a core theme of migraine biology: the condition is fundamentally about how readily brain cells become and stay excited.

MTHFR, homocysteine, and migraine with aura

The MTHFR gene, and specifically the C677T variant, has been repeatedly linked to migraine with aura. MTHFR helps convert homocysteine into methionine, and the reduced-activity T allele can leave homocysteine levels modestly elevated. Higher homocysteine may affect the lining of blood vessels and nitric oxide signaling, both relevant to the vascular changes that accompany aura. The association is strongest for the aura subtype, which is a useful example of how a single methylation-pathway variant can shape one specific migraine phenotype.

Common variants versus rare familial forms

Large genome-wide studies have identified more than 100 genetic regions associated with common migraine. Many sit near genes involved in vascular function and smooth-muscle tone, reinforcing that migraine bridges both neural and vascular systems. This matters for expectations: most people with migraine do not carry a single causative mutation. Their risk is the cumulative effect of many small-effect variants interacting with sleep, hormones, stress, diet, and hydration.

How genetics informs, not dictates, management

Knowing that migraine has a strong genetic basis reframes it as a legitimate biological condition rather than a personal failing, and it validates a prevention-focused approach. It does not, however, hand you a prescription. Genetic variation can hint at which pathways, such as excitability or methylation, are worth discussing, but only a qualified provider can evaluate your history, rule out other causes, and build a management plan. Consistent sleep, trigger tracking, and clinician-guided care remain the foundation.

Where pathway insight fits

The PlexusDx Precision Peptide Genetic Test examines how your genes influence biological pathways across 14 pathways, 49 peptides, 150+ genetic insights. It is educational and pathway-level: it does not diagnose migraine, predict how you will respond to any medication. What it offers is context on the excitability, methylation, and inflammation pathways that intersect with migraine biology, giving you an informed starting point for a conversation with your provider.

Frequently Asked Questions

Is migraine genetic?

Yes, to a significant degree. Heritability is estimated at 40 to 60 percent. Most migraine is polygenic, involving many common variants, while rare familial forms stem from single high-impact variants in genes like CACNA1A. Genes set susceptibility, but triggers and lifestyle strongly influence how often attacks occur.

Does the MTHFR variant cause migraines?

No single variant causes migraine on its own. The MTHFR C677T variant is associated with a higher likelihood of migraine with aura, likely through effects on homocysteine and vascular function. It is one contributing factor among many, not a diagnosis or a guarantee that attacks will occur.

Can genetic testing tell me which migraine medication to take?

No. Genetic testing does not predict drug response or select medications for you. The Precision Peptide Genetic Test offers pathway-level education about your biology. Choices about migraine treatment belong to you and a qualified healthcare provider who can assess your full clinical picture.

Want to understand the excitability and methylation pathways that intersect with migraine biology? Explore the Precision Peptide Genetic Test for your pathway-level insights, then bring them to your provider.

The Precision Peptide Genetic Test analyzes how your genes influence peptide-related biological pathways. It does not recommend, prescribe, or determine which peptides you should use. Consult a qualified healthcare provider before beginning any peptide protocol.

This article is part of the PlexusDx Education Hub. Browse all Brain & Cognitive Health education

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.