MTHFR Brain Word Cloud

Methylation and MTHFR

an emerging area of importance in the treatment of mental health disorders

Methylation and genetic polymorphisms, like MTHFR, are hot topics in the field of mood and stress disorders, especially for naturopaths and nutritionists.


Methylation is an enormously important metabolic process in the body. Disturbances in methylation have widespread influences on numerous body systems, and serve as risk factors for the development of a number of conditions.  Ensuring your methylation cycle is working properly is vital to your health and well-being, especially if you are pregnant, require hormone support, need liver and digestive support, for cancer support and also for mood and stress complaints.

MTHFR is an area of genetic research showing links to many aspects of health.

Stress, anxiety, depression, infertility, and hormone imbalances are just some of the areas investigated.

MTHFR genetic issues can be greatly helped with nutrition.

Geelong Nutritionist Adrian Stone from Living Holistic Health talks more on this.


Methylation is a bio-chemical process occurring in most cells right throughout your body.  In technical terms, methylation is the transfer of a methyl group to another compound, involving several enzymes.

In addition, methylation is divided into different parts (pathways);


The major roles of methylation are biosynthesis, regulation and detoxification. Methylation also involves the processing of several B vitamins, minerals and amino acids, in a large recycling type conveyor belt.  To keep it simple, just think of it as a complex metabolic process operating in a series of cycles, which is used right throughout the body, and is very important to your health.

Some examples of how methylation occurs includes;

  • The methylation of drugs to support their metabolism and excretion in your body
  • The methylation of neurotransmitters and hormones, such as dopamine, histamine, melatonin and oestrogen, to facilitate their excretion from your body
  • The synthesis and repair of myelin proteins, which protects your nerves cells
  • Energy production
  • Methylation helps mobilize fats, cholesterol and their elimination, which reduces your risk for heart attacks, high cholesterol and helps to regulate your weight
  • The methylation of DNA to modify the transcription of genes in your cells

So, as you can see methylation does A LOT!

One of the big things it is responsible for in your body is the processing of a chemical you make called homocysteine. This is really important, as high levels of homocysteine in your body can be toxic, and can be a pre-cursor to things like heart attacks and strokes. But from a mental health perspective, high homocysteine is linked to mental health conditions, such as anxiety, autism and depression. And what is even more interesting, is that reducing homocysteine levels in the body, with nutritional medicine, has been shown to improve mood.

Methylation Nerves


Your nervous system, (which includes your brain), needs to have an effective method of communication, so that what you sense, (hear, see, feel, smell), can be transmitted to your brain for processing, to determine your next course of action.  And in order for this communication to flow between your nerve cells to your brain and vice versa, your nervous system uses chemical messengers called neurotransmitters.  You may be familiar with some of these; serotonin, melatonin, dopamine, GABA, glutamate, histamine, acetylcholine, etc.   These neurotransmitters are made from amino acids, and produced with the assistance of nutrients, (such as zinc, magnesium, vitamin B6, iron, vitamin C), using the methylation process.

Therefore, it follows that if there is an issue with your neurotransmitters, (such as too much glutamate, or not enough melatonin), the reason why this might be happening could be because your methylation cycle is not working properly.  In fact, the amount of research on methylation in mood and stress recently has been huge, and it is now acknowledged as a substantial risk factor for conditions such as depression.

For babies, in combination with environmental factors such as nutrition, conditions in utero (just before birth) and stressful events, problems with methylation plays a key role in the progression of major depressive disorder (MDD).  This is shown in the diagram below, and comes straight from a recent scientific research article, (if you like your science, click on the diagram to be directed straight to the article).

Chart showing factors affecting methylation

For more information about MTHFR and Pregnancy


There are many factors which can affect how your methylation cycle operates.

Factors which regulate your methylation cycle include;

  • Many enzymes in the cycle require cofactors (derived from vitamins/minerals) to activate
  • Cofactors required to complete methylation
  • Cofactors required to turn off methylation
  • Excessive substrates may turn off methylation via feedback inhibition

Factors which can stop your methylation cycle from working properly include;

  • Diet – excess animal proteins, saturated fats, sugars, coffee, alcohol
  • Lack of cofactors driving methylation forward (Low zinc, magnesium, vitamin B6)
  • Medications e.g. Antacids (lowers vitamin B12), oral contraceptive pill, diuretics
  • Poor digestion, liver stress, leaky gut
  • Smoking (depletes folate, SAMe)
  • Niacin (depletes methyl groups)
  • Environmental toxins e.g. acetaldehyde (alcohol, yeasts), heavy metals – such as arsenic, mercury
  • Genetic mutations in your methylation enzymes (MTHFR, CBS, COMT, MS/MTR)

It is vitally important for you to understand that these factors will all play a role in your methylation capacity. Although a lot of research has focused on the genetic mutations that affect methylation, (such as MTHFR which we will discuss shortly), you can have problems with methylation WITHOUT having a genetic mutation, and you can have a genetic mutation WITHOUT having problems with methylation.  As the saying goes, your genes are not your destiny, and you can manage them well through your diet and lifestyle.

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Chemical Methylation Cycle

The main parts of the methylation cycle which you need to know are;

Folic Acid – this is a synthetic, (man-made), version of folate, which is in many fortified, processed foods, especially bread.  Folic acid needs to be converted from folic acid into folate, (5- Methyl THF), via the Folate Pathway.  The healthy human liver can only metabolise around 400mcg folic acid within a one hour period, (stay away from supplements that have more!).   Folic acid may compete with natural folates for their place on folate receptors and folate enzymes, which can cause problems for your methylation cycle overall.

Folinic Acid – is half way in between Folic Acid and Folate, hence it is a partially converted form, and can bypass some of the steps needed to convert folic acid to folate.  This makes it really useful as a supplement if you have problems methylating.

Dietary Folate –  the natural form of folate.  Natural folates are destroyed by UV rays and cooking, so dietary provision of folate can be insufficient. Natural folates are degraded easily by your stomach acid, however, stomach acid also contains vitamin C which can help protect the folate molecule.

5-Methyl THF (5-MTHF) – the activated form of folate.  Can be given as a supplement, and like folinic acid is great if you struggle to methylate properly.

B12, B2, B3, B6 – co-factors important for all parts of methylation.  Can be found in different (activated) forms.

Betaine (TMG) – created from the amino acids choline and glycine.  Really important for the methylation cycle occurring in the liver.

Methionine – an amino acid found in the diet.  Methionine is conveted via methylation to form homocysteine, which is then converted further to form glutathione, which is probably the most important antioxidant in your body.

Homocysteine – formed from methionine, via methylation, and need to be constantly recycled. Homocysteine is important for you to make glutathione (a natural antioxidant), but too much homocysteine in your body is toxic.  It is commonly measured in a blood test, and if you have too much, it means that your methylation cycle is not working properly.

SAMe – is made in your body from a reaction between methionine and adenosine triphosphate, a molecule that carries energy. SAMe is a methyl donor, of vital importance to your methylation cycle and can be supplemented.  SAMe has been used to treat psychiatric illnesses, infertility, liver problems, premenstrual disorders, and musculoskeletal conditions.  SAMe has been widely studied for osteoarthritis and depression. There is evidence that SAMe may help reduce the pain of osteoarthritis.  Some evidence is available for the use of SAMe for depression, fibromyalgia, and bile flow problems during pregnancy. SAMe has also been studied for its potential anti-inflammatory and pain-relieving effects.

MTHFR – an enzyme involved in the folate pathway, crucial to converting folic and folinic acid to 5-MTHF, the active form.  MTHFR can not work properly, due to genetic defects, and is now commonly tested when there is thought to be a methylation issue.


One of the most common reasons for your methylation cycle not working properly is an issue with the folate pathway.  You can see this pathway in the diagram below. Don’t worry about the technical details, what is most important for you to understand is the vitamin co-factors needed for each step, and the enzymes (in orange boxes).

Folate Pathways chart

The last orange box in the pathway, MTHFR, along with vitamin B2, is required to make 5-MTHF, which is the last step in the cycle, and the most activated version of folate.

The MTHFR gene can be affected by a number of polymorphisms, with the C677T and A1298C polymorphisms being the most clinically relevant. If you are heterozygous, (one copy of the gene is affected), or homozygous, (two copies of the gene are affected,) for these polymorphisms then your folate cycle can be disrupted, affecting the homocysteine cycle as well as many other metabolic pathways. The table below highlights the potential impacts if one or both of these polymorphisms are present.


If you suspect that you may have an issue with methylation, you can use the table below as a guide, to see if any of these symptoms correlate to how you are feeling. It is not definitive, but it may offer some insights.

Methylation Checklist


So, now that you have read this far, you suspect that you have a methylation issue.

It is important to find out the exact cause, because as we mentioned earlier, poor methylation came be influenced by a variety of factors.  An initial consultation with a health practitioner specialising in methylation, (such as ourselves), will help paint a very clear picture of the underlying factors driving your problems.

Book an Appointment

We are open 6 days per week, by appointment only. Book an appointment online via our online booking link.


Methylation Profile – after an initial assessment, you practitioner may choose to run a number of tests, to determine the status of your methylation cycle, and also the cause of any disruption.  A good test to aid assessment is a serum blood test, called the methylation profile. An example of one is pictured below.


ORGANIC ACIDS – METABOLIC profile – Amino acids are precursors for methylation; plus, many amino acids undergo methylation during metabolism, e.g. methionine is the precursor to homocysteine, while glycine and serine are both methyl donors. Using amino acids, a practitioner can peer even more deeply into your methylation status. This might be appropriate in more complicated  cases of neuropsychiatric disorders, infertility, or autism. For example, if methionine or glycine is abnormal, it could indicate aberrations in your methylation pathway, requiring either more amino acids or more methylation cofactors.

Integrative medicine Geelong

Methylenetetrahydrofolate reductase (MTHFR) –  is a genetic test that looks for compromised MTHFR-enzyme activity that may lower methylation capacity and cause elevated homocysteine.  It assess with you have one copy, (heterozygous), or two copies (homozygous), of the gene mutation.

Genomic Testing

Advanced methyl genes – this test looks at more than just the MTHFR gene for mutations, and is a more comprehensive assessment. It’s often used if the MTHFR test has come back negative, but a genetic influence on your methylation is still suspected.

Advanced Methyl

Diet Geelong


Having this knowledge about methylation is all well and good, but it doesn’t help a great deal if you don’t know what to do with it!  So, we’ve put together some simple dietary measures which should help you.  Please bear in mind as we mentioned before, the methylation journey is a long, hard road, and your patience and persistence will be tested.  However, working together with your practitioner, you can achieve some amazing results, and dramatically improve the quality of your life.


Foods to avoid – Over Methylators

Methyl-containing nutrients
Serotonin enhancing substances
* May cause exacerbation of symptoms
Foods to avoid – Under Methylators

Excessive folic acid intake (look at processed foods)
* May cause exacerbation of symptoms
Foods to Support Methylation – Vitamin B6, Vitamin B12, Betaine

Vitamin B6: Pasture fed beef, avocado, brewer’s yeast
Vitamin B12: Liver, kombu, nori, sardines, mackerel
Betaine: Beetroot, spinach, prawns
Methionine – eggs, soy protein, spirulina
Animal based protein – creatine, choline, B12, carnitine
Vegetarians may need to be supplemented – creatine, choline, B12 and carnitine
Foods Rich in Natural Folate

Leafy green vegetables: Spinach, romaine, mustard, collard
Other vegetables: Asparagus, broccoli, brussels sprouts, squash,
green beans, peas
Legumes: Lentils, pinto beans, garbanzo beans, black beans
Brightly coloured fruit: Berries, mango, plums, citrus, papaya
Nuts and seeds
Foods to support natural detoxification pathways

Cruciferous vegetables (cabbage, broccoli, Brussels’ sprouts, kale, bok choy, cauliflower),
and artichoke
Citrus – lemons, oranges and tangerines
Onions, garlic
Protein – egg, protein powder, lean meats, poultry and fish
Nuts and seeds
Foods to provide antioxidant protection

Green tea
Thiol containing foods (Garlic, onions, cruciferous vegetables)
Brazil nuts
Berries, especially blueberries
Foods to fight inflammation

Increase fibre
Eat a rainbow to increase antioxidants: Colourful fruit,
vegetables and especially berries
Anti-inflammatory foods: Cacao powder, green tea,
ginger, turmeric
Increase Omega-3s: Salmon, mackerel, trout, sardines
Oat bran, apples, strawberries and green leafy vegetables
Foods to support healthy fatty acid metabolism

Healthy fats – coconut, olive, avocado, nuts
Carnitine and CoQ10 rich foods – red meat, fish, chicken
breast (free range)
Sesame seeds, tahini
Avoidance of trans and hydrogenated fats
Colourful fruit and vegetables

exercise and Methylation


  • Regular exercise improves cardiovascular and general physical fitness, however it also shows benefits to genetic health.
  • Aerobic or resistance training should be undertaken regularly, a minimum of 30 minutes per day for at least 5 days of the week is recommended
  • Exercise has been shown to influence DNA in fat cells, potentially affecting fat cell metabolism
  • Gene expression can affect response to exercise, therefore some may require more exercise to gain equivalent benefits. You may need to speak to your healthcare practitioner for guidance
  • Certain polymorphisms can affect pain tolerance and therefore ability to exercise. Your practitioner can speak to regarding any further anti-inflammatory support you may require
  • Yoga shows benefits for those with GST polymorphisms and hypertension, reducing blood pressure and increasing levels of antioxidants within the body.
As with any health advice from the internet, (or anywhere else), please make sure you follow the advice of your health care professional primarily.   If you would like to try any of the options listed above, please talk to your healthcare practitioner, (including us), about this first.  We have seen so many clients come through our clinic, who have tried to self medicate with natural therapies, and have gotten into worse problems, or have not received any benefits.   There are plenty of cheap, dodgy supplements on the market these days, so please be wary as cheaper is definitely not better!


You can hopefully get some take away points from this information, but if you need further assistance, then we are here to help you. Seeing a qualified practitioner can take the guess work out of the equation for you, saving you time and money in the long run, and get you feeling better much faster.

You will get the benefit of our skills and expertise to correctly identify the best nutritional treatment options for you.  You will be prescribed only the best quality herbs and nutrients, which means that you know that you are taking only the nutrients that you really need, and that they are the best quality available.

With guidance from us and these simple tips, you can improve your methlyation cycle, and live a healthier, happier life.

Would you like some further assistance?  Please contact us or book an appointment.

Book an Appointment

We are open 6 days per week, by appointment only. Book an appointment online via our online booking link.