MTHFR and COMT are genes involved in using folate and clearing stress chemicals like dopamine and adrenaline. Common variants are very common and usually cause no symptoms on their own. For women, the bigger questions are folate, pregnancy, mood, and stress, and mainstream guidance says to keep taking standard folic acid if you could become pregnant.
Maybe a test result said “MTHFR mutation” and you went down an internet rabbit hole. Maybe you’ve read that your genes are the reason you feel anxious, wired, or worn out, and now you’re second-guessing your prenatal vitamin.
Take a breath, friend. I’ve been there. I have MTHFR and COMT variants myself, and I remember how heavy that label felt at first.
In this post, I’ll walk you through what these genes do, what research actually says about symptoms, folate, and pregnancy, and the gentle, everyday things that may help. I’ll also share my own story, and where God met me in it.
This post is for education only. Talk with your doctor before changing any supplement or medication, especially if you’re pregnant or trying to conceive.
In this post
- What MTHFR and COMT Actually Do
- Does MTHFR Cause Symptoms in Women?
- MTHFR, COMT, Stress, and Anxiety
- Folate vs Folic Acid: What’s True?
- MTHFR, Pregnancy, and Miscarriage
- Should You Get Tested for MTHFR?
- What Helps: Gentle Ways to Care for Your Body and Stress
- My Story
- Peace When You Feel “Wired This Way”
- Frequently Asked Questions
What MTHFR and COMT Actually Do
MTHFR (methylenetetrahydrofolate reductase) gives your body the instructions to make an enzyme that helps turn folate into its active form, called 5-MTHF or methylfolate (NIH Office of Dietary Supplements). Your body uses folate to make DNA and to break down an amino acid called homocysteine (CDC; MedlinePlus). Some MTHFR variants make this enzyme work a bit more slowly.
COMT (catechol-O-methyltransferase) helps your body break down chemical messengers like dopamine and norepinephrine, which affect mood, focus, and your stress response. Research shows COMT also helps process estrogen (Bastos et al., 2017), which is one reason I talk about supporting methylation pathways when it comes to hormones. Some COMT variants clear these chemicals more slowly.
You’ll often hear these called “mutations.” A better word is “variant.” Variants are normal differences in our genes, like the ones that give us brown eyes or blue eyes (Cleveland Clinic). They’re also very common. According to the CDC, more people in the United States have one or two copies of the most common MTHFR variant, C677T, than don’t (CDC). About 25% of Hispanic people, 10% of White and Asian people, and 1% of Black people carry two copies (NIH ODS).
Does MTHFR Cause Symptoms in Women?
Here’s the honest answer: most people with common MTHFR variants don’t have any symptoms from them (Cleveland Clinic).
A small number of people with two copies of a variant may have higher homocysteine or slightly lower folate, especially when they aren’t getting enough folate (Cleveland Clinic). Even then, research suggests that how much folate and folic acid you get matters more for your blood folate than your genes do (CDC).
When I first wrote about MTHFR, I listed things like heart disease and chronic fatigue as possible effects. I’ve learned more since then, and I want to be mindful with you. Newer research has not supported a link between MTHFR variants and blood clots, or between mildly higher homocysteine and heart disease (American College of Medical Genetics and Genomics). Some studies have looked at a possible link between certain MTHFR variants and migraine, but the findings are mixed and not settled (Liu et al., 2019).
Having an MTHFR variant, a COMT variant, or both doesn’t guarantee that you’ll have any of these. Lifestyle, environment, and your mental, emotional, and spiritual health all play a part too. If you’re dealing with fatigue, headaches, or low mood, it’s worth looking at the whole picture with your doctor.
MTHFR, COMT, Stress, and Anxiety
This is the part I care about most, because it’s where so many women live: busy, stretched, and feeling anxious more often than not.
Some research has looked at whether COMT variants affect how sensitive people are to stress and anxiety. So far, the results are mixed. One large review of 27 studies found small links between a common COMT variant and anxious traits in some groups of men, but not in women (Lee and Prescott, 2014).
Research on MTHFR and mood is suggestive, not conclusive. Some reviews have found links between the C677T variant and depression, but the results differ a lot between populations (Zhang et al., 2022). Low folate has been linked with depression in some, but not all, studies (NIH ODS).
So a gene doesn’t cause anxiety on its own. What we do know is that chronic stress affects the whole body. When you’ve been running on stress hormones such as cortisol and adrenaline for a long time, you may feel wired, tired, and on edge, whatever your genes say. And anxiety is about more than brain chemistry. Your thoughts, your sleep, your season of life, and your soul all matter.
If anxiety or low mood is affecting your daily life, please talk with your doctor or a counselor. Reaching out for help is a brave and faithful step.
Folate vs Folic Acid: What’s True?
There’s a lot of confusing information out there, so let’s keep it simple.
- Folate is the B vitamin found naturally in food.
- Folic acid is the form added to fortified foods and most prenatal vitamins.
- Methylfolate (5-MTHF, also called L-methylfolate) is the active form your body uses (NIH ODS).
In functional medicine, I learned that some women with MTHFR variants may convert folic acid less efficiently into its methylated form, which is the most active form our bodies use. Research supports part of this: the C677T variant may lower the body’s ability to make 5-MTHF, because the enzyme works more slowly (NIH ODS). MedlinePlus also notes that a provider may sometimes suggest methylfolate for people with an MTHFR variant, since their bodies may be able to use that form more easily (MedlinePlus). Research on whether that helps is still inconclusive (NIH ODS).
Here’s what methylfolate is used for in the body. Research suggests it may support:
- The folate cycle, and making and repairing DNA, which every dividing cell needs (NIH ODS; Field et al., 2018)
- Recycling homocysteine into methionine and SAMe (S-adenosylmethionine), one of the body’s main methyl donors (NIH ODS)
- The methylation that supports making serotonin, dopamine, and norepinephrine, the chemical messengers tied to mood (Stahl, 2008; NIH ODS)
- Red blood cell formation. Too little folate can lead to a type of anemia with large, immature red blood cells (NIH ODS)
Now, the other side, and it matters just as much. According to the CDC, people with MTHFR variants can still process all types of folate, including folic acid. Folic acid is the only form of folate shown to help prevent neural tube defects, like spina bifida. The CDC says MTHFR variants are not a reason to avoid folic acid, and if you could become pregnant, its standard daily folic acid recommendation still applies, even with an MTHFR variant (CDC).
So both things can be true. Your body may use some forms of folate a little differently, and folic acid still does important work. Please don’t stop or switch your prenatal on your own. I personally take a prenatal with the methylated form of folate. That’s my own choice, not a recommendation for you. Talk with your doctor about what’s right for you.
You also don’t need to avoid any foods because of MTHFR (Cleveland Clinic). Folate-rich foods include dark leafy greens like spinach, asparagus, Brussels sprouts, beans, peas, and avocado (NIH ODS).
MTHFR, Pregnancy, and Miscarriage
If you’re reading this after a loss, I’m so sorry. Please hear this first: a miscarriage is not your fault.
Many women find articles online that blame MTHFR for miscarriage. Mainstream research doesn’t support a proven link between common MTHFR variants and pregnancy loss (UT Southwestern). The American Society for Reproductive Medicine lists MTHFR testing as not recommended when evaluating recurrent pregnancy loss (ASRM, 2026), and the American College of Medical Genetics and Genomics agrees (ACMG).
One randomized trial in women with recurrent miscarriage compared methylfolate with folic acid. It found no difference in miscarriage rates between the two groups, whatever their MTHFR results (Nasiri et al., 2015).
Taking folic acid before and during pregnancy is still the standard recommendation, with or without a variant (CDC). If you’ve had a miscarriage, your OB/GYN or a reproductive specialist can talk with you about a full evaluation. Your grief is real, and you don’t have to carry it alone.
Should You Get Tested for MTHFR?
Most guidelines say routine MTHFR testing isn’t needed, because the result rarely changes care (Cleveland Clinic; MedlinePlus; ACMG).
If there’s a reason to look deeper, these labs may come up with your doctor instead:
- Homocysteine, an amino acid that can rise when folate or vitamin B12 is low (MedlinePlus)
- Folate
- Vitamin B12
I recommend getting labs, like the ones on my free Normal Labs checklist, through your own practitioner. From there, we can talk through what lifestyle changes and supplements could also be helpful. If your labs came back “normal” but you still don’t feel like yourself, you may relate to why “normal” labs don’t always match how you feel.
And if you’ve already been tested, your result is one piece of your story. It isn’t a label, and it doesn’t define you.
What Helps: Gentle Ways to Care for Your Body and Stress
Your body is a gift from God, and caring for it is an act of stewardship. Here are some gentle ways to care for your body and your stress, whatever your genes:
- Eat whole, nourishing foods. Fill your plate with vegetables, fruits, beans, whole grains, and good-quality protein, including folate-rich foods like leafy greens and lentils (NIH ODS). It also helps to limit processed foods and alcohol, and to notice which foods don’t seem to sit well with you.
- Choose low- to moderate-impact movement. Walking, Pilates, or swimming are good options. Start with what feels doable on most days.
- Calm your mind and body. Prayer, stillness, and slow breathing can help settle your nervous system.
- Protect your sleep. The CDC recommends at least 7 hours a night for adults (CDC). I use an Oura Ring to see how I’m sleeping.
- Go easy on caffeine and alcohol. Caffeine can leave you feeling on edge or anxious. Both can disrupt sleep. Caffeine can keep you awake, and alcohol before bed can make sleep less restful (CDC). You can read my caffeine story here.
My Story: What I Learned From My Own MTHFR and COMT Results
On my own health journey, I found out I have variants in both my MTHFR and COMT genes.
At first, that seemed to explain why I struggled with anxiety, migraines, and hormone symptoms after coming off 15+ years of birth control.
So I did what I had learned in functional medicine. I took methylated B vitamins and magnesium, and I ate all the right foods. That was my own choice at the time, not a recommendation for you. My hormone symptoms improved with seed cycling and other food changes. But even after all of that, I still had anxiety and migraines.
At the same time, I spent more than five years doing personal growth and mindset work. One day, it all came together.
I realized my body had been in survival mode for years. I had been living in a stressed, “fight or flight” state because of all the pressure I put on myself to:
- Be perfect
- Feel like I was good enough
- Prove my worth
- Make others happy
Deep down, I wasn’t happy. God revealed to me that I had been looking for peace in achievements, performing and proving, instead of in Him.
Once I saw that, I began to shift my perspective, change my beliefs, and let go of old patterns. Over time, my body settled into a calmer “rest and digest” state. For me, that’s when the anxiety and migraines finally eased.
Here’s what I took from it. You can:
- Eat the right foods
- Do all the exercise programs
- Take all the supplements
All of these may help you feel better. But if your body is still stuck in survival mode, there may be more to the story. Sometimes the deeper work is learning to rest, surrender, and let your body feel safe again.
That was my experience. Yours may look different, and that’s okay. Every woman’s body is different.
Peace When You Feel “Wired This Way”
When you see your genes on a lab report, it’s easy to feel like you’re just wired to worry. I want you to know that your genes don’t define you. God knit you together, and He knows every detail of how He made you.
I spent years trying to earn peace by doing everything right. The peace I was looking for didn’t come from a perfect protocol. It came from Him.
Paul’s words still steady me:
“Don’t worry about anything; instead, pray about everything. Tell God what you need, and thank him for all he has done. Then you will experience God’s peace, which exceeds anything we can understand. His peace will guard your hearts and minds as you live in Christ Jesus.”
Philippians 4:6–7 (NLT)
Feeling anxious doesn’t mean your faith is weak. This verse isn’t a promise that symptoms will disappear. It’s an invitation to bring every worry to Jesus while you care for the body He gave you. That’s the heart of faith-based functional medicine.
Understanding your hormones through God’s design
Because COMT also helps your body process estrogen, your genes and your hormones are connected. My upcoming book, Estrogen By Design, explains estrogen through God’s design. Join the waitlist and I’ll send you a free devotional as a thank-you.
Frequently Asked Questions
What are the symptoms of MTHFR in women?
Most women with common MTHFR variants have no symptoms from the variant itself. A small number with two copies may have higher homocysteine or lower folate, especially if they don’t get enough folate. If you’re dealing with fatigue, low mood, or anxiety, it’s worth looking at the whole picture with your doctor.
Can MTHFR cause anxiety?
Research on MTHFR and mood is mixed and doesn’t show that the variant causes anxiety. Stress, sleep, nutrition, hormones, and life circumstances all play a role. If anxiety is affecting your daily life, talk with your doctor or a counselor.
What does it mean to have MTHFR and COMT variants together?
MTHFR helps your body use folate, and COMT helps break down stress chemicals like dopamine and adrenaline. Some research has looked at whether slower COMT variants make people more sensitive to stress. Having both doesn’t decide your health, and caring for stress, sleep, and nutrition still matters most.
Should I avoid folic acid if I have MTHFR?
No. According to the CDC, people with MTHFR variants can process folic acid, and it’s the only form of folate shown to help prevent neural tube defects. In functional medicine, I learned that some women with MTHFR variants may convert folic acid less efficiently to its methylated, active form (5-MTHF, or L-methylfolate). If you could become pregnant, the standard folic acid recommendation still applies. Talk with your doctor before changing your prenatal.
Does MTHFR cause miscarriage?
There’s no proven link between common MTHFR variants and miscarriage, and major medical groups don’t recommend MTHFR testing after pregnancy loss. If you’ve had a miscarriage, your OB/GYN or a reproductive specialist can talk with you about a full evaluation. Your grief is real, and you don’t have to carry it alone.
Should I get tested for MTHFR?
Most guidelines say routine MTHFR testing isn’t needed because the result rarely changes care. Your doctor may check homocysteine, folate, and vitamin B12 instead if there’s a reason to. If you’ve already been tested, your result is one piece of your story, not a label.
What foods should I avoid with MTHFR?
You don’t need to avoid any foods because of an MTHFR variant. Eating plenty of folate-rich foods, like leafy greens, beans, and lentils, supports healthy folate levels. Whole, nourishing meals are a good foundation for everyone.
What does the Bible say about worry and anxiety?
Philippians 4:6–7 (NLT) says, “Don’t worry about anything; instead, pray about everything,” and promises God’s peace “which exceeds anything we can understand.” Prayer doesn’t replace care from your doctor, but you don’t have to face anxiety alone.
Talk With Someone Who Understands
If you’re wondering how stress may be affecting you with an MTHFR or COMT variant, it can help to talk with someone who will listen to your whole story and help you build a personal plan for your stress and your health.
I offer lifestyle, nutrition, supplement, and faith-integrated guidance, 100% virtually, for women in the US and internationally. I walk alongside your own doctors, not in place of them. The first step is a free 30-minute Connection Call by video. It’s a chance to share what’s been going on and see whether working together feels right. Labs and supplements are separate costs. You can also see how working with me works.
Last updated: October 16, 2026. About the author: Kate Vazquez is a Christian functional medicine practitioner and the founder of Radiant by Design. She is a PA-C by training but doesn’t practice as a PA. She now offers women lifestyle, nutrition, supplement, and faith-integrated guidance, with prayer and Scripture woven in.
This post is for education only and is not a substitute for care from your own doctor. Talk with your doctor before changing any supplement or medication, especially if you’re pregnant or trying to conceive.
Sources
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- Hickey SE, et al. “ACMG Practice Guideline: lack of evidence for MTHFR polymorphism testing.” Genetics in Medicine, 2013: https://pubmed.ncbi.nlm.nih.gov/23288205/
- Bashford MT, et al. “Addendum: ACMG Practice Guideline: lack of evidence for MTHFR polymorphism testing.” Genetics in Medicine, 2020: https://pubmed.ncbi.nlm.nih.gov/32533132/
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- UT Southwestern Medical Center, “Should you test for MTHFR gene mutation while pregnant or after miscarriage?” (2024): https://utswmed.org/medblog/mthfr-gene-pregnancy/
- Nasiri M, et al. Randomized, double-blind trial of 5-MTHF vs folic acid in women with recurrent miscarriage and MTHFR polymorphisms. Int J Reprod BioMed / PMC, 2015: https://pmc.ncbi.nlm.nih.gov/articles/PMC4668025/
- Lee LO, Prescott CA. “Association of the catechol-O-methyltransferase val158met polymorphism and anxiety-related traits: a meta-analysis.” Psychiatric Genetics, 2014: https://pubmed.ncbi.nlm.nih.gov/24300663/
- Zhang YX, et al. “Association between variants of MTHFR genes and psychiatric disorders: A meta-analysis.” Frontiers in Psychiatry, 2022: https://pubmed.ncbi.nlm.nih.gov/36061291/
- Bastos P, et al. “Catechol-O-Methyltransferase (COMT): An Update on Its Role in Cancer, Neurological and Cardiovascular Diseases.” Rev Physiol Biochem Pharmacol, 2017: https://pubmed.ncbi.nlm.nih.gov/28456872/
- Liu L, et al. “Effects of MTHFR C677T and A1298C Polymorphisms on Migraine Susceptibility: A Meta-Analysis of 26 Studies.” Headache, 2019: https://pubmed.ncbi.nlm.nih.gov/31045246/
- Stahl SM. “L-methylfolate: a vitamin for your monoamines.” Journal of Clinical Psychiatry, 2008: https://pubmed.ncbi.nlm.nih.gov/19193337/
- Field MS, et al. “Nuclear Folate Metabolism.” Annual Review of Nutrition, 2018: https://pubmed.ncbi.nlm.nih.gov/30130467/
- CDC, “About Sleep”: https://www.cdc.gov/sleep/about/index.html
- Philippians 4:6–7, New Living Translation, Bible Gateway (checked Oct 16, 2026): https://www.biblegateway.com/passage/?search=Philippians%204%3A6-7&version=NLT
