EMF sensitivity and electromagnetic hypersensitivity: why some people react and what actually helps

By Dr. Ben Lynch, ND Bestselling Author of Dirty Genes | Founder, Seeking Health

Key takeaways

• EMF sensitivity is real, biologically explainable, and exists on a spectrum. Some people notice mild fatigue after a long video call. Others cannot enter a grocery store without a splitting headache. A small percentage are effectively disabled by modern wireless technology.
• Your genes determine your position on that spectrum. Thirteen gene pathways shape how hard EMF hits you. One or two variants mean mild susceptibility. Stack them all, and you may be among the severely affected.
• EMF causes biological harm through six documented mechanisms. Voltage-gated calcium channel overactivation, NMDA-mediated excitotoxicity, mast cell degranulation, glutathione depletion, electrolyte disruption, and mitochondrial damage. Each one compounds the next.
• Bluetooth is a radiofrequency EMF source. AirPods and wireless earbuds sit millimeters from your brain. I get headaches from them quickly. Wired headphones are not a lifestyle choice. They are a physiological one.
• Reducing exposure is the first step. Turn off Wi-Fi at night. Use wired internet. Keep Bluetooth off when not in active use. Switch your phone from 5G to LTE. These changes matter, and they cost nothing.
• Targeted nutritional support supports the root mechanisms. Glutathione lozenges, magnesium, lithium orotate, electrolytes, and mast cell support are what I use myself and recommend to others.^†

You wake up after what should have been eight hours of sleep, and your head already feels thick. By midmorning, two hours into your first video call, a pressure builds behind your eyes that is not quite a headache but is not nothing either. By afternoon, the brain fog has arrived, and you are running at maybe sixty percent of your usual capacity.

You have tried cutting caffeine. You have tried improving your sleep. You eat well. You exercise. And nothing changes until, almost by accident, you spend a weekend camping without your phone, WiFi or Bluetooth, and you feel like a different person.

That experience is not placebo. It is biology.

Who gets EMF sensitivity and electromagnetic hypersensitivity, and why some people get it far worse than others

Most people can sit in a room full of Wi-Fi routers, cell phones, and Bluetooth devices all day and feel nothing beyond ordinary tiredness. However, a large group notices fatigue that accumulates faster than it should, sleep that degrades when a phone is on the nightstand, and headaches that improve suspiciously when they travel somewhere remote. A smaller group is profoundly affected. For these individuals, a smart meter installation, a 5G tower going up nearby, or a new router in their home can trigger debilitating symptoms, including severe headaches, heart palpitations, cognitive disruption, skin reactions, and an inability to function in normal environments.

This is not a spectrum of belief. It is a spectrum of biochemical vulnerability.

• The World Health Organization acknowledges that the symptoms experienced by people who report electromagnetic hypersensitivity are real and can be severe enough to impair daily functioning.¹ It does not yet classify the condition as a formal disease entity.
• European medical guidelines from the EUROPAEM working group recommend using ICD-10 code W90 (exposure to nonionizing radiation) combined with R68.8 (other specified symptoms and signs) and Z58.4 (exposure to radiation in the environment) when documenting these patients.²
• The Nordic Council of Ministers included electromagnetic intolerance as a classifiable occupational disorder under ICD-10 as early as 2000.³
• The WHO estimates that somewhere between one and ten percent of the population is affected, though these figures are considered unreliable given the absence of standardized diagnostic criteria.¹

Wireless earbuds like AirPods emit radiofrequency radiation and sit directly against the ear canal, within millimeters of brain tissue. I get headaches and fatigue quickly when I use them. Wired headphones are the straightforward solution and the one I use every day.

The six mechanisms of EMF harm (and how they stack)

Treatment is determined by which mechanisms are affecting you. Address one and ignore the others, and you get partial results. Address all of them, and you address the problem. Each mechanism below is a layer: the more that apply to you, the more sensitive you are.

Mechanism one: voltage-gated calcium channel overactivation

Voltage-gated calcium channels (VGCCs) regulate how calcium enters cells, governing nerve firing, immune activation, and dozens of other processes. EMF activates VGCCs directly. A review of 23 independent studies found that both Extremely Low Frequency (ELF) and radiofrequency EMF drive a rapid, large influx of calcium across multiple cell types.⁴ Once activated, up to one million calcium ions per second flood through a single channel.⁴

The calcium overload does two things simultaneously:

• It activates endothelial nitric oxide synthase (eNOS), which requires calcium to function and produces nitric oxide.
• And it accelerates mitochondrial electron transport, which causes the mitochondria to leak superoxide as a byproduct.

Nitric oxide reacts with that mitochondrial superoxide to form peroxynitrite, one of the most destructive oxidants in human biology.⁴

Here is where most explanations stop. But there is a second and a third loop that most people have never heard of, and these are why EMF damage does not simply stop when the exposure ends.

Second loop: Peroxynitrite continues to be generated after EMF exposure

eNOS requires a cofactor called tetrahydrobiopterin (BH4) to function properly. When BH4 is adequate, eNOS produces nitric oxide cleanly. When peroxynitrite accumulates, it oxidizes BH4, converting it into BH2. Peroxynitrite attacks BH4 faster than almost any other biological molecule.²⁸

With BH4 depleted, eNOS uncouples. An uncoupled eNOS enzyme stops producing nitric oxide and instead generates superoxide directly.²⁸ That superoxide combines with the remaining nitric oxide to produce more peroxynitrite. More peroxynitrite oxidizes more BH4. More BH4 depletion causes more uncoupling. The engine becomes self-sustaining.

This is the eNOS uncoupling loop. It means a single significant EMF exposure can initiate a peroxynitrite cascade that propagates long after the exposure ends, as long as BH4 remains depleted and glutathione (GSH) cannot quench it fast enough. People cross the uncoupling threshold faster and recover more slowly if:

• They carry a NOS3 genetic variants that reduce baseline eNOS activity or expression
• Already have a lower BH4 reserve before EMF exposure
• Carry a DHFR variant that reduces the recycling of BH2 back to active BH4

This is why some people feel terrible for days after a high-EMF environment, and others recover within hours. The threshold and the recovery rate are genetically determined.

The third loop: DNA strand breaks and Methylfolate depletion

The self-sustained production of peroxynitrite following EMF exposure can lead to DNA strand breaks and methylfolate depletion. Two mechanisms are involved:

1. Recycling of BH2 by DHFR

To break the cycle and re-couple eNOS, BH2 must be converted back into active BH4. The enzyme that recycles BH2 is DHFR.29

However, DHFR has another important job. It is a vital enzyme in the Thymidylate Cycle, which recycles folate after it’s been used to generate thymidine. Thymidine is essential for generating robust, healthy DNA. Insufficient thymidine can result in DNA strand breaks.30

If DHFR is being kept busy recycling BH2 back to BH4, it has reduced capacity for the Thymidylate cycle. This means that more methylfolate is diverted towards thymidine production, and less is available for methylation reactions.31 In particular, low methylfolate levels are associated with low glutathione.32 Glutathione is important for reducing oxidative stress and helping to halt the self-perpetuating peroxynitrite cycle.

This situation is made even worse if you’re consuming synthetic folic acid, which also slows DHFR activity.33

2. Depletion of Methylfolate Directly

Another way the body breaks the peroxynitrite cycle is by directly scavenging peroxynitrite using methylfolate.34 This results in oxidized methylfolate, which cannot be used until it has been regenerated back to its original form by ascorbic acid (vitamin C).36

This is another pathway that reduces folate levels, contributing to low thymidine levels and potential DNA strand breaks.

Mechanism two: the NMDA receptor and excitotoxic calcium flooding

The NMDA receptor controls calcium entry into neurons and is central to learning, memory, and neurological function. Under normal conditions, magnesium sits inside the channel and physically blocks calcium. The neurotransmitters glutamate and glycine decrease magnesium's affinity for the binding site, allowing controlled entry of calcium into the cell.37,38 When magnesium is depleted, the gate opens and calcium floods in.

Elevated homocysteine bypasses the normal regulatory mechanism by acting as a direct NMDA receptor agonist.⁵ This means that homocysteine can activate NMDA receptors and trigger calcium influx even when normal magnesium levels are present.⁶

People with MTHFR C677T variants and inadequate B-vitamin intake often carry chronically elevated homocysteine, meaning their NMDA receptors are partially activated before a single Wi-Fi packet is transmitted. EMF then compounds the calcium load that was already elevated. This is the mechanism connecting MTHFR to EMF sensitivity.

Mechanism three: glutathione depletion and the oxidative stress spiral

Peroxynitrite produced by mechanism one must be neutralized by glutathione (GSH). When GSH is adequate, peroxynitrite is quenched. When GSH is depleted, oxidative damage accumulates in cell membranes, mitochondria, and DNA.

EMF measurably reduces glutathione in brain tissue and blood across multiple animal studies.⁷ The depletion then compounds through a second route: when extracellular glutamate rises, the cystine/glutamate antiporter runs in reverse, cutting cystine import and further reducing GSH synthesis.⁸ More glutamate activates more NMDA receptors, which floods more calcium, which generates more oxidative stress, which depletes more GSH. Breaking this spiral requires restoring GSH from outside while addressing upstream calcium flooding.

Mechanism four: mast cell degranulation and histamine release

Calcium is the primary trigger for mast cell degranulation. EMF raises intracellular calcium through VGCCs, and mast cells respond accordingly. Researcher Olle Johansson proposed in 2000 that mast cell degranulation is the primary mechanism underlying electromagnetic hypersensitivity.⁹ Skin biopsies from healthy volunteers exposed to two to four hours of ordinary screens showed measurable changes in cutaneous mast cells.¹⁰ Individuals with EMF hypersensitivity show elevated mast cell numbers, elevated histamine markers, and altered mast cell distributions compared to healthy controls.¹¹

When mast cells degranulate, they release histamine, heparin, tryptase, prostaglandins, and dozens of inflammatory mediators. H1 receptor signaling drives headaches, brain fog, skin flushing, anxiety, and sleep disruption. Based on my clinical experience, H1 receptor overactivation is one of the most underappreciated drivers of severe EMF sensitivity symptoms.

Mechanism five: electrolyte depletion and loss of membrane stability

Magnesium sits inside the NMDA receptor channel, competes with calcium at VGCC binding sites, and stabilizes cell membranes and the sodium-potassium pump. EMF depletes magnesium. Rat studies show magnesium is the most significantly reduced electrolyte following EMF exposure, with potassium also reduced.¹² The result is a compounding cycle: EMF activates VGCCs and depletes magnesium simultaneously. Lower magnesium means the next exposure causes larger calcium floods, which deplete more magnesium. People who do not actively replenish magnesium and potassium become progressively more reactive over time.^†

Mechanism six: mitochondrial damage and energy failure

Mitochondria are the downstream target of all preceding mechanisms and are uniquely vulnerable to both calcium overload and peroxynitrite. Mitochondrial DNA lacks the repair mechanisms of nuclear DNA. EMF exposure has been documented to reduce ATP production and cause mitochondrial fragmentation following chronic exposure.¹³

This is the mechanism behind fatigue that does not respond to sleep, post-exertional crashes, and cognitive impairment persisting for days after significant EMF exposure. When mitochondria cannot produce sufficient energy, every system downstream suffers.

If you already have one of these conditions, EMF is amplifying it

Each of the six mechanisms maps directly to recognized medical conditions. These conditions exist because the same pathways that EMF disrupts can be chronically dysregulated by genetics, infections, toxins, and nutrient deficiencies. When someone with one of these conditions encounters significant EMF, they are not developing a new problem. They are pushing a system past its remaining reserve.

Mechanism one (VGCC overactivation and eNOS uncoupling): migraines, hemiplegic migraine, heart arrhythmias, long QT syndrome, neurological development disorders, mood and other mental health disorders, nervous system issues, neuropathic pain, IBS, and interstitial cystitis. Gabapentin and pregabalin are among the most commonly prescribed drugs for these conditions. They work by blocking VGCC alpha-2-delta subunits. If your condition is managed with a calcium channel blocker, you are living with VGCC dysfunction. EMF makes it worse. NOS3 variants that reduce eNOS activity or expression add a compounding layer: hypertension, coronary vasospasm, coronary artery disease, stroke, and preeclampsia are all associated with reduced eNOS function and impaired NO bioavailability. People with these conditions are already running a compromised eNOS system. EMF-driven calcium overload is more likely to tip their eNOS into the uncoupling loop because their BH4 reserve is thinner to begin with.

Mechanism two (homocysteine NMDA excitotoxicity): low mood, vascular dementia, memory issues, nervous system disease, stroke risk, and multiple sclerosis. Elevated homocysteine is an established risk factor for all of these through the same NMDA activation pathway EMF exploits. Carriers of an MTHFR variant, who have elevated homocysteine, are running low-grade NMDA excitotoxicity continuously. EMF adds to a load that already exists.

Mechanism three (glutathione depletion): Nervous system disease (substantia nigra GSH is reduced approximately 40 percent at diagnosis), diseases that affect memory, neurological development disorders, mental health issues, ME/CFS, multiple sclerosis, ALS, and multiple chemical sensitivity. Low glutathione is among the most consistent laboratory findings across neurodegenerative and neuropsychiatric conditions. In ME/CFS and MCS, antioxidant reserves are chronically depleted. Even modest EMF tips these individuals into symptomatic oxidative crisis.

Mechanism four (mast cell and histamine): MCAS, IBS, interstitial cystitis, POTS, Ehlers-Danlos syndrome, fibromyalgia, chronic Lyme, mold illness, neurological development disorders, nervousness disorders, and low mood. POTS and EDS are frequently comorbid with MCAS. Headache, dysautonomia, and panic disorder have all been documented as neuropsychiatric manifestations of MCAS. If you have any of these conditions, your mast cells are already primed. EMF is one more trigger on an already hair-trigger system.

Mechanism five (magnesium depletion): chronic migraine, blood pressure issues, arrhythmias, blood sugar issues, attention disorders, nervousness, osteoporosis, and metabolic syndrome. Low magnesium is one of the most consistent findings in migraine patients. Migraineurs are structurally predisposed to EMF sensitivity because the magnesium-NMDA-calcium system underlying their headaches is the same system that EMF activates.

Mechanism six (mitochondrial dysfunction): ME/CFS, fibromyalgia, lingering effects from a virus, Gulf War Illness, nervous system issues, memory disorders, and some genetic brain diseases. Mitochondrial dysfunction is now regarded as central to ME/CFS. Post-exertional fatigue in ME/CFS shares the same impaired cellular energy production that EMF-driven peroxynitrite produces. These patients are not being hypochondriacal. Their mitochondria are already impaired. EMF accelerates the depletion.

The clinical picture this produces is striking. A person with migraines, heart palpitations, IBS, non-restorative fatigue, and extreme nervousness is not presenting with five unrelated problems. They may have one underlying problem expressed through five downstream pathways. This is the patient whose standard labs are normal and whose doctor suggests burnout. The biology is coherent. The missing piece is the unifying mechanism.

Genetic variants that determine your vulnerability: MTHFR, CACNA1C, NOS3, DAO, and ten more

The following genes govern the six mechanisms above. Each variant you carry adds a layer of susceptibility. None of them are destiny. All of them are modifiable through targeted nutritional support.

Check your variants with the StrateGene genetic report at Seekinghealth.com/strategene.

How to reduce EMF sensitivity: what I do every day

These are the concrete changes I have made. Not theory. They reduce my daily symptom burden.

Turn off Wi-Fi at night. Put your router on a timer. This eliminates eight hours of cumulative exposure per night.

Use wired internet instead of Wi-Fi. Buy an Ethernet adapter for your laptop. Turn off the wireless card while working. You reduce both your own exposure and the radiofrequency radiation concentrated through your device.

Use wired headphones, not Bluetooth. Earbuds sit directly against the ear canal for extended periods. I use wired headphones for calls, music, and podcasts.

Connect your phone to your car with a cable. In most cars, not Teslas, Apple CarPlay works identically over a wired connection with a meaningfully different exposure profile.

Turn off Bluetooth and Wi-Fi when not in use. Your phone pings these radios constantly in the background. There is no benefit to having them on when you are not using them.

Switch from 5G to LTE. On an iPhone: Settings, Cellular, Cellular Data Options, Voice and Data, select LTE.

Keep your phone away from your body. Not in your front pocket. Not on your nightstand. Distance reduces field strength dramatically.

When I notice a heavy head or early brain fog despite these precautions, that is my signal to take supplements. The environmental controls reduce the load. The nutritional support handles my response to what gets through.^†

EMF sensitivity support supplements: what I use and why^†

The protocol follows directly from the mechanisms. Each product targets a specific biological failure point.

Glutathione Plus Cofactors. Glutathione neutralizes peroxynitrite and terminates the EMF-driven oxidative cascade. EMF depletes GSH in brain tissue and blood.⁷ Lozenge form provides reduced GSH within physiological ranges with better intracellular uptake than capsules. Start here.^†

Optimal Magnesium. Magnesium physically blocks the NMDA receptor channel,²³ modulates VGCC activity, and is depleted by EMF exposure.¹² Optimal Magnesium provides glycinate, malate, and citrate forms for cellular uptake, neurological function, and muscle relaxation. Target 300 to 400 mg elemental daily, working up gradually.^†

Brain Nutrients. EMF-driven oxidative stress hits the brain first. Brain Nutrients provides phosphatidylserine and active B vitamins to support neurotransmitter synthesis and mitochondrial health.^†

Optimal Electrolyte. Magnesium is the priority, but the full electrolyte panel matters. Optimal Electrolyte provides sodium, potassium, magnesium, niacin, and PeakATP® to support cellular energy, hydration, and heart rhythm.^† Dehydrated cells are more vulnerable to ionic disruption.

Lithium Orotate. Low-dose lithium reduces NR2B subunit phosphorylation at the NMDA receptor, directly limiting calcium influx,²⁴ and upregulates glutathione-dependent enzymes in animal models.²⁵ Start at 5 mg daily.^†

Optimal PC and Fish Oil. Cell membranes are the interface at which EMF interacts with biology. Membranes rich in phosphatidylcholine (PC) and omega-3 PUFAs maintain better ion channel function under oxidative stress. Optimal PC provides phosphatidylcholine from sunflower lecithin. Fish oil supports the DHA and EPA profile that FADS variants impair.^†

Mast Cell Nutrients, if needed. For confirmed MCAS or significant mast cell reactivity, to support healthy mast cell stability directly.^†

Histamine Nutrients, if needed. For low DAO activity, HNMT variants, or supporting a healthy response to histamine symptoms after high-histamine foods. Provides DAOgest® enzyme with cofactors riboflavin, pyridoxal-5-phosphate, copper, zinc, and SAMe.^†

Homocysteine Nutrients, if you have MTHFR or elevated homocysteine. Elevated homocysteine is activating your NMDA receptors. Homocysteine Nutrients provides 5-MTHF, methylcobalamin, pyridoxal-5-phosphate, riboflavin, and trimethylglycine to support healthy homocysteine remethylation and reduce baseline NMDA excitatory drive.^†

Know your genetic terrain

Generic protocols work to a point. Personalized ones work better. The StrateGene Genetic Report analyzes all thirteen variants covered in this article and presents them in a format connecting your genes to your symptoms and supplement choices. If you have not run your genetics, start there.

The Seeking Health Histamine Workbook is the companion resource if your EMF sensitivity is primarily presenting through histamine and mast cell symptoms.

The bottom line

EMF sensitivity is not uniform, and it is not psychological. It is biochemical. Six mechanisms explain it, thirteen gene pathways determine how many apply to you, and targeted nutritional support can reverse it. Reduce your exposure first, then address the biology.

Your biochemistry is not fixed. It is depleted. Depleted systems respond to targeted repletion.

Frequently asked questions about EMF sensitivity

Is EMF sensitivity a recognized medical condition?

The WHO recognizes the symptoms as real and potentially severely disabling¹ but has not yet classified EHS as a formal disease entity. EUROPAEM guidelines recommend ICD-10 codes W90, R68.8, and Z58.4 for clinical documentation.² The Nordic Council of Ministers classified electromagnetic intolerance as a codable occupational disorder under ICD-10 in 2000.³ The diagnostic infrastructure is still developing, but the underlying biology is documented in peer-reviewed research.

Why do some people have much worse EMF sensitivity than others?

Biochemical vulnerability. Your variants in CACNA1C, NOS3, MTHFR, COMT, MAOA, DAO, HNMT, NRF2, GPX1, GSTM1, GSTP1, PEMT, FADS1, and FADS2 determine how well your body handles the oxidative, calcium, histamine, and membrane challenges EMF produces. Fewer vulnerable variants means you tolerate EMF without noticeable symptoms. Multiple variants across multiple pathways means you can be debilitated by exposures that others around you do not notice.

Can AirPods and Bluetooth earbuds cause headaches and brain fog?

Yes, for people susceptible to the VGCC and mast cell mechanisms. Wireless earbuds sit directly against the ear canal, within millimeters of brain tissue, often for hours at a time. I get headaches and brain fog from AirPods quickly. Use wired headphones.

Why does EMF trigger histamine reactions and mast cell activation?

EMF raises intracellular calcium via VGCCs. Elevated calcium is the primary trigger for mast cell degranulation. Histamine released by degranulation drives headaches, brain fog, flushing, anxiety, and sleep disruption. People with MCAS, low DAO, or HNMT variants cannot clear that histamine efficiently, and symptoms persist. If your EMF sensitivity looks like an allergic reaction, that is because at the cellular level, it is.

What is the connection between MTHFR and EMF sensitivity?

MTHFR C677T impairs methylfolate production and causes homocysteine to accumulate. Elevated homocysteine directly activates NMDA receptors, driving chronic low-level calcium flooding into neurons⁵ before any EMF exposure occurs. Each exposure compounds a load that was already elevated. Supporting healthy homocysteine levels with 5-MTHF, methylcobalamin, and B vitamins removes one of the two primary calcium inputs.^†

Can I reverse EMF sensitivity?

Yes. Restoring glutathione, replenishing magnesium, clearing histamine, and reducing cumulative exposure can meaningfully reverse sensitivity over four to twelve weeks in my experience. The biology is driven by nutrient depletion and biochemical overload. Depletion responds to repletion.^†

Why does magnesium support response to EMF sensitivity?

Magnesium physically blocks the NMDA receptor channel at resting membrane potential²³ and modulates VGCC activity. EMF depletes it.¹² When magnesium is low, calcium floods more easily with each exposure. Replenishing it rebuilds the physiological gatekeeper at the root of EMF harm.^†

What is the right amount of glutathione to take?

The goal is restoring physiological levels, not pharmacological excess. GSH redox chemistry is bidirectional: too little amplifies excitotoxicity, and too much (supraphysiological levels) can slightly potentiate NMDA calcium influx.²⁶ Lozenge doses within physiological ranges are appropriate and safe for regular use.^†

References

1. World Health Organization. Electromagnetic hypersensitivity. WHO Backgrounder. 2005. https://www.who.int/docs/default-source/documents/radiation/who-workshop-on-electrical-hypersensitivity.pdf
2. Belyaev I, et al. EUROPAEM EMF guideline 2016 for the prevention, diagnosis and treatment of EMF-related health problems and illnesses. Rev Environ Health. 2016;31(3):363-397. PMID: 27454111. https://pubmed.ncbi.nlm.nih.gov/27454111/
3. Nordic Council of Ministers. Nordic Adaptation of Classification of Occupationally Related Disorders to ICD-10. 2000. Referenced in: Leszczynski D. The lack of international and national health policies to protect persons with self-declared EHS. Rev Environ Health. 2024;39:163-189. https://doi.org/10.1515/reveh-2022-0108
4. Pall ML. Electromagnetic fields act via activation of voltage-gated calcium channels to produce beneficial or adverse effects. J Cell Mol Med. 2013;17(8):958-965. PMID: 23802593. https://pubmed.ncbi.nlm.nih.gov/23802593/
5. Lipton SA, et al. Neurotoxicity associated with dual actions of homocysteine at the N-methyl-D-aspartate receptor. Proc Natl Acad Sci USA. 1997;94(11):5923-5928. PMID: 9159176. https://pubmed.ncbi.nlm.nih.gov/9159176/
6. Paul S, Bhattacharya A. GluN2A-NMDA receptor-mediated sustained Ca2+ influx leads to homocysteine-induced neuronal cell death. J Biol Chem. 2024;300(4):107176. PMID: 38499098. https://pubmed.ncbi.nlm.nih.gov/38499098/
7. Schuermann D, Mevissen M. Effects of radiofrequency electromagnetic field exposure on biomarkers of oxidative stress in vivo and in vitro: a systematic review. Environ Int. 2021;158:106974. PMID: 34735905. https://pubmed.ncbi.nlm.nih.gov/34735905/
8. Murphy TH, et al. Oxidative glutamate toxicity can be a component of the excitotoxicity cascade. J Neurosci. 2001;21(19):7455-7462. PMID: 11567035. https://pubmed.ncbi.nlm.nih.gov/11567035/
9. Gangi S, Johansson O. A theoretical model based upon mast cells and histamine to explain the recently proclaimed sensitivity to electric and/or magnetic fields in humans. Med Hypotheses. 2000;54(4):663-671. PMID: 10859662. https://pubmed.ncbi.nlm.nih.gov/10859662/
10. Johansson O, et al. Cutaneous mast cells are altered in normal healthy volunteers sitting in front of ordinary TVs/PCs: results from open-field provocation experiments. J Cutan Pathol. 2001;28(10):513-519. PMID: 11737520. https://pubmed.ncbi.nlm.nih.gov/11737520/
11. Johansson O. Electrohypersensitivity: state-of-the-art of a functional impairment. Electromagn Biol Med. 2006;25(4):245-258. PMID: 17178584. https://pubmed.ncbi.nlm.nih.gov/17178584/
12. Myacare Editorial Staff. Electromagnetic fields and health Pt.5: impact on our cells. Mya Care. 2022. [Secondary review; primary rat study citations pending verification before publishing.]
13. Yakymenko I, et al. Oxidative stress mechanisms in biological systems exposed to radiofrequency electromagnetic fields: a comprehensive meta-analysis. Free Radic Biol Med. 2022. [Primary citation verification required before publishing.]
14. MedlinePlus Genetics. CACNA1C gene. National Library of Medicine. https://medlineplus.gov/genetics/gene/cacna1c/
15. Frosst P, et al. A candidate genetic risk factor for vascular disease: a common mutation in methylenetetrahydrofolate reductase. Nat Genet. 1995;10(1):111-113. PMID: 7647779. https://pubmed.ncbi.nlm.nih.gov/7647779/
16. Chen J, et al. COMT val158met genotype influences temporal response to catecholamines during emotional processing. Neuropsychopharmacology. 2011;36(7):1453-1462. PMID: 21430653. https://pubmed.ncbi.nlm.nih.gov/21430653/
17. Maintz L, Novak N. Histamine and histamine intolerance. Am J Clin Nutr. 2007;85(5):1185-1196. PMID: 17490952. https://pubmed.ncbi.nlm.nih.gov/17490952/
18. Smolinska S, et al. Histamine and gut mucosal immune regulation. Allergy. 2014;69(3):273-281. PMID: 24286351. https://pubmed.ncbi.nlm.nih.gov/24286351/
19. Glutathione S-transferase mu 1. GeneCards; ScienceDirect Topics. Approximately 50 percent of Caucasians carry GSTM1 null deletion. [Cite GeneCards GSTM1 entry and PMID: 15573182 for prevalence data.]
20. Tossetta G, et al. Functional polymorphisms in NRF2: implications for human disease. Antioxidants (Basel). 2019;8(9):397. PMID: 31540503. https://pmc.ncbi.nlm.nih.gov/articles/PMC6779133/
21. Zhu X, et al. Phosphatidylethanolamine N-methyltransferase: from functions to diseases. Front Physiol. 2023;14:1191156. PMID: 37250125. https://pmc.ncbi.nlm.nih.gov/articles/PMC10187709/
22. Xie L, Innis SM. Genetic variants of the FADS1 FADS2 gene cluster are associated with altered (n-6) and (n-3) essential fatty acids in plasma and erythrocyte phospholipids. J Nutr. 2008;138(11):2222-2228. PMID: 18936223. https://pubmed.ncbi.nlm.nih.gov/18936223/
23. Traynelis SF, et al. Activation mechanisms of the NMDA receptor. In: Biology of the NMDA Receptor. CRC Press. NCBI Bookshelf NBK5274. https://www.ncbi.nlm.nih.gov/books/NBK5274/
24. Hashimoto R, et al. Lithium protection against glutamate excitotoxicity in rat cerebral cortical neurons: involvement of NMDA receptor inhibition possibly by decreasing NR2B tyrosine phosphorylation. J Neurochem. 2002;80(4):589-597. PMID: 11841566. https://pubmed.ncbi.nlm.nih.gov/11841566/
25. Nonaka S, Hough CJ, Chuang DM. Chronic lithium treatment robustly protects neurons in the central nervous system against excitotoxicity by inhibiting N-methyl-D-aspartate receptor-mediated calcium influx. Proc Natl Acad Sci USA. 1998;95(5):2642-2647. PMID: 9482940. https://pubmed.ncbi.nlm.nih.gov/9482940/
26. Janaky R, et al. Glutathione modulates NMDA receptor-activated calcium influx into cultured rat cerebellar granule cells. Neurosci Lett. 1993;156(1-2):153-157. PMID: 8414178. https://pubmed.ncbi.nlm.nih.gov/8414178/
27. Vecoli C, et al. Endothelial nitric oxide synthase gene polymorphisms in cardiovascular disease. Curr Pharm Des. 2014;20(22):3627-3645. PMID: 25189395. https://pubmed.ncbi.nlm.nih.gov/25189395/
28. Kuzkaya N, et al. Interactions of peroxynitrite, tetrahydrobiopterin, ascorbic acid, and thiols: implications for uncoupling endothelial nitric-oxide synthase. J Biol Chem. 2003;278(25):22546-22554. PMID: 12692136. https://pubmed.ncbi.nlm.nih.gov/12692136/
29. Crabtree MJ, et al. Critical role for tetrahydrobiopterin recycling by dihydrofolate reductase in regulation of endothelial nitric-oxide synthase coupling: relative importance of the de novo biopterin synthesis versus salvage pathways. J Biol Chem. 2009 Oct 9;284(41):28128-28136. PMID: 19666465. https://pubmed.ncbi.nlm.nih.gov/19666465/
30.  Abali EE, et al. Regulation of human dihydrofolate reductase activity and expression. Vitam Horm. 2008:79:267-92. PMID: 18804698. https://pubmed.ncbi.nlm.nih.gov/18804698/
31. Webber S, et al. Comparative activity of rat liver dihydrofolate reductase with 7,8-dihydrofolate and other 7,8-dihydropteridines. Arch Biochem Biophys. 1985 Feb 1;236(2):681-90. PMID: 3970530. https://pubmed.ncbi.nlm.nih.gov/3970530/
32. Mosharov E, et al. The quantitatively important relationship between homocysteine metabolism and glutathione synthesis by the transsulfuration pathway and its regulation by redox changes. Biochemistry. 2000 Oct 24;39(42):13005-11. PMID: 11041866. https://pubmed.ncbi.nlm.nih.gov/11041866/
33. Whitsett J, et al. Human endothelial dihydrofolate reductase low activity limits vascular tetrahydrobiopterin recycling. Free Radic Biol Med. 2013 Oct:63:143-50. PMID: 23707606. https://pubmed.ncbi.nlm.nih.gov/23707606/
34. Rezk BM, et al. Tetrahydrofolate and 5-methyltetrahydrofolate are folates with high antioxidant activity. Identification of the antioxidant pharmacophore. FEBS Lett. 2003 Dec 18;555(3):601-5. PMID: 1467578. https://pubmed.ncbi.nlm.nih.gov/14675781/
35. Antoniades C, et al. 5-methyltetrahydrofolate rapidly improves endothelial function and decreases superoxide production in human vessels: effects on vascular tetrahydrobiopterin availability and endothelial nitric oxide synthase coupling. Circulation. 2006 Sep 12;114(11):1193-201. PMID: 16940192. https://pubmed.ncbi.nlm.nih.gov/16940192/
36.  Rozoy E, et al. The use of cyclic voltammetry to study the oxidation of l-5-methyltetrahydrofolate and its preservation by ascorbic acid. Food Chem. 2012 Jun 1;132(3):1429-1435. PMID: 29243632. https://pubmed.ncbi.nlm.nih.gov/29243632/
37.  Liu Y, et al. NMDA and glycine regulate the affinity of the Mg2+-block site in NR1-1a/NR2A NMDA receptor channels expressed in Xenopus oocytes. Life Sci. 2001 Mar 9;68(16):1817-26. PMID: 11292060. https://pubmed.ncbi.nlm.nih.gov/11292060/
38.  Nowak L, et al. Magnesium gates glutamate-activated channels in mouse central neurones. Nature. 1984 Feb;307(5950):462-5. PMID: 6320006. https://pubmed.ncbi.nlm.nih.gov/6320006/