HSA | FSA CARDS ARE NOW ACCEPTED

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.

How Magnesium and Your Genes Affect Methylation, Energy, and Nervous System Health

Magnesium is a critical mineral that supports hundreds of enzyme reactions across the body. It helps stabilize ATP, the cell's energy currency, and acts as a necessary cofactor for enzymes in the methylation and methionine cycles. Those cycles are central to neurotransmitter regulation, detoxification, DNA maintenance, and homocysteine balance. When magnesium is low, enzymes that require magnesium-bound ATP can slow down, which may show up as low energy, muscle tension or cramps, sleep or mood changes, and changes in detoxification or cardiovascular markers.

Your genetic makeup can influence how well your body keeps magnesium in balance. The variant rs3750425 affects magnesium handling and blood levels. Below are practical, genotype-specific interpretations and recommendations to help you support magnesium status and the methylation network.

TT genotype — two effect alleles (lower serum magnesium)

What this means

Carrying two copies of the effect allele is associated with modestly lower serum magnesium. This can reduce the efficiency of magnesium-dependent enzymes, including those in methylation such as COMT, and can lead to subtle disruptions in neurotransmitter breakdown, energy production, and homocysteine recycling.

Common signs to watch for

  • Low or fluctuating energy
  • Muscle tightness, spasms, or cramps
  • Sleep disturbances or restless sleep
  • Mood changes such as irritability or anxiety
  • Persistent constipation or headaches in some people

Dietary recommendations

  • Eat magnesium-rich leafy greens such as spinach, Swiss chard, and kale.
  • Include nuts and seeds daily: almonds, cashews, pumpkin seeds, and chia.
  • Choose legumes and beans: black beans, lentils, chickpeas.
  • Prefer whole grains such as quinoa, brown rice, and oats.
  • Enjoy small amounts of dark chocolate and avocados for extra magnesium.

Supplement and testing guidance

  • Consider checking serum magnesium with your healthcare provider. Some clinicians also use red blood cell magnesium or ionized magnesium for a more detailed view.
  • If tests show low magnesium or you have symptoms, discuss a low-dose supplement such as magnesium glycinate or magnesium citrate. Typical starting elemental magnesium ranges from 200 to 400 mg daily, individualized by your clinician.
  • Take supplements with food to improve tolerance. Start at lower doses to assess GI tolerance and adjust under clinical supervision.

Lifestyle and medication considerations

  • Limit excess alcohol and high caffeine intake which can increase magnesium loss.
  • Stay well hydrated and maintain regular activity to support circulation and nutrient delivery.
  • Manage stress with sleep hygiene, breathing exercises, or meditation to reduce magnesium depletion.
  • Tell your healthcare provider about prescription or over the counter medications you take, as some can affect magnesium levels.
CT genotype — one effect allele (slightly lower serum magnesium)

What this means

Having one copy of the effect allele is linked to a slightly lower blood magnesium level. The impact is usually modest but can subtly affect magnesium-dependent enzymes in methylation and neurotransmitter metabolism, especially if diet and lifestyle do not provide adequate magnesium.

Signs to monitor

  • Mild low energy or fatigue
  • Occasional muscle tightness or cramping
  • Sleep or mood fluctuations
  • Worsening symptoms with poor diet, high stress, or heavy alcohol use

Dietary recommendations

  • Prioritize leafy greens, nuts, seeds, legumes, and whole grains.
  • Add magnesium-rich snacks such as pumpkin seeds or nut butters.
  • Balance calcium and vitamin D intake, as these nutrients interact with magnesium absorption.

Supplement and testing guidance

  • Discuss a basic serum magnesium test with your healthcare provider if you have symptoms.
  • If testing shows low or borderline magnesium, a clinician may suggest 200 to 400 mg elemental magnesium daily via glycinate or citrate. Adjust dose based on symptoms and tolerance.

Lifestyle tips

  • Reduce behaviors that deplete magnesium, including excess alcohol and chronic stress.
  • Improve sleep quality and include gentle movement such as walking or yoga.
  • Review medications with your clinician to identify any that could lower magnesium.
CC genotype — zero effect alleles (typical serum magnesium)

What this means

Carrying two copies of the non-effect allele is associated with typical serum magnesium levels and normal magnesium transport. Enzymes that rely on magnesium are expected to function efficiently under usual dietary and lifestyle conditions.

Maintenance recommendations

  • Continue a balanced diet that includes magnesium-rich foods: leafy greens, nuts, seeds, legumes, whole grains, and moderate dark chocolate.
  • Consider a low-dose magnesium supplement such as magnesium glycinate 200 to 300 mg daily only if dietary intake is low, symptoms appear, or a clinician recommends it.
  • Check serum magnesium if you experience new symptoms like muscle cramps, persistent fatigue, or sleep disturbances, or if you begin medications that affect magnesium.

Lifestyle tips

  • Maintain regular physical activity and a consistent sleep schedule.
  • Limit excess alcohol and very high caffeine intake.
  • Manage stress with restorative practices and eat a varied nutrient-dense diet.

General practical tips to support magnesium and methylation

  • Include a variety of magnesium-rich foods every day rather than relying only on supplements.
  • Balance electrolytes and stay hydrated to support cellular transport and enzyme function.
  • Address sleep, stress, and movement as part of a holistic approach; poor sleep and chronic stress increase magnesium demand.
  • Review supplements and medications with your healthcare provider to avoid interactions and excessive dosing.
  • Consider targeted blood tests if symptoms persist: serum magnesium, and when indicated, red blood cell magnesium or ionized magnesium for a deeper assessment.

PlexusDx does not provide medical advice. This information is educational and intended to help you understand how a genetic variant related to magnesium may influence methylation and related health factors. Always consult your healthcare provider before starting or changing supplements, testing, or treatments. Your provider can interpret genetic results in the context of your medical history, medications, and lab testing to create a safe, personalized plan.

If this genetic variant is present in your PlexusDx results, the following tests and reports are commonly used to explore it further:

🧬 Genetic Tests:

🧪 Blood Tests:

📄 Genetic Report:

Frequently Asked Questions About Cofactors and Magnesium TRPM6 rs3750425

How does the magnesium-related variant rs3750425 affect methylation and energy?

rs3750425 is linked to differences in magnesium handling and blood magnesium levels. Since magnesium supports ATP stability and acts as a cofactor for enzymes in the methylation and methionine cycles, lower magnesium can reduce efficiency of magnesium-dependent processes involved in neurotransmitter regulation, detoxification, DNA maintenance, and homocysteine balance—potentially showing up as low energy, muscle tension/cramps, and sleep or mood changes.

What symptoms might suggest low magnesium with TT, CT, or CC genotypes?

With TT (two effect alleles), symptoms may include low or fluctuating energy, muscle tightness/spasms or cramps, sleep disturbances, mood changes (e.g., irritability/anxiety), and in some people constipation or headaches. With CT (one effect allele), impacts are usually modest but can still present as mild fatigue, occasional cramping, and sleep/mood fluctuations—often worsening with poor diet, high stress, or heavy alcohol use. With CC (zero effect alleles), typical serum magnesium is expected, so symptoms may be less likely unless other factors are at play.

What diet, supplements, and testing are recommended for magnesium support by genotype?

Across genotypes, prioritize magnesium-rich foods such as leafy greens (spinach, Swiss chard, kale), nuts and seeds (almonds, cashews, pumpkin seeds, chia), legumes (black beans, lentils, chickpeas), and whole grains (quinoa, brown rice, oats), plus small amounts of dark chocolate and avocados. If symptoms occur or intake is low, consider discussing testing with your clinician—commonly serum magnesium, and if needed red blood cell magnesium or ionized magnesium. Supplement guidance (only with clinician input) may include magnesium glycinate or citrate, often starting in the 200–400 mg elemental magnesium range and adjusting for GI tolerance; also limit excess alcohol/high caffeine, stay hydrated, and review medications that may affect magnesium levels.

What tests can help me learn more about Cofactors and Magnesium TRPM6 rs3750425?

The Genetic Methylation Test delivers over 300 genetic insights related to methylation, detoxification, and nutrient processing. The Methylation Pathway Genetic Report translates your results into personalized, actionable guidance. Your healthcare provider can also recommend targeted blood tests based on your specific pathway results and health history to complement your genetic insights with current biomarker data.

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.