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What is Methylation?

Updated: Jun 19

The word "methylation" is tossed around on the internet like we all know what is going on here, but it's hard to find a good explanation of what it is, what it does, or why it's important. So let's dive in and make some sense out of it.



What is Methylation?


Methylation is a very small, foundational chemical function in your body. It involves the moving of a methyl group, which is a carbon with three hydrogens that you can picture a lot like a Mickey Mouse head with an extra ear (shudder).


Your body has to be able to methylate things repeatedly in every cell. In fact, the methylation cycle runs roughly one billion times per second in your cells, which is staggering.


Anything your body uses resources to do one billion times per second has to be pretty pivotal. The methylation cycle is linked to the folate cycle like cogs in a machine at the pivotal MTHFR enzyme. This enzyme has to be running smoothly for the folate or methylation cycles to work normally, and it isn't always running smoothly. There could be problems with the MTHFR enzyme for several reasons:


  • MTHFR gene mutation. This includes C677T, A1298C, or compound heterozygous mutations. Also, other smaller, less-well-studied variances.

  • Folic acid toxicity. Folic acid, the synthetic form of folate, can become toxic when all daily sources, including folic acid from food fortification, reach1000 mcg. This toxicity impairs the function of the MTHFR enzyme.

  • Folate deficiency. If there isn't enough dietary folate, the folate and methylation cycles can't work properly because they have nothing to work on.

  • Riboflavin deficiency. Riboflavin is a necessary cofactor to the MTHFR enzyme, meaning if there isn't a riboflavin molecule bonded to the enzyme, then it can't function.


Why Methylation Matters


Your body attaches this methyl group to a variety of molecules like proteins, DNA, neurotransmitters, and toxins to change those molecules so that they become more biologically active or functional. Here are some examples of what methylation does:

  1. Gene Regulation: Methylation helps regulate gene expression, which means it controls which genes are turned on or off. This is essential for the proper development and functioning of cells.

  2. DNA Repair: Methylation is involved in repairing damaged DNA. It helps maintain the integrity of our genetic material by facilitating the repair of DNA strands that may be damaged due to various factors like exposure to environmental toxins or radiation.

  3. Neurotransmitter Production: Methylation is crucial for the production of neurotransmitters, which are chemicals that transmit signals between nerve cells. Proper neurotransmitter function is essential for mood regulation, cognition, and overall mental health.

  4. Detoxification: The body uses methylation in the detoxification process. It helps convert toxins into less harmful substances that can be eliminated from the body.

  5. Cellular Energy Production: Methylation is involved in the synthesis of coenzyme Q10 and carnitine, which are important for energy production within our cells.

  6. Immune System Function: Methylation is also involved in the regulation of the immune system, helping the body defend itself against infections and diseases.

  7. Building Healthy Babies: Methylation of the genetic material used in eggs and sperm is crucial to the development of a healthy, viable fetus and therefore to fertility.

  8. Estrogen Metabolism: Estrogen must be methylated for proper metabolic breakdown and without functioning methylation, estrogen can build up, increasing cancer and disease risk.

  9. Histamine Breakdown: Histamine must also be methylated in order to be eliminated, especially from the brain. Poor methylation can contribute to problems like MCAS, histamine intolerance, and severe allergies.


So if you don't methylate efficiently, then all of the processes listed don't happen the way they should.  They still happen, but not as well, not as effectively, and in a way that could cause you some serious symptoms.


One of The Biggest Causes Of Methylation Problems is MTHFR


MTHFR gene mutations affect the gene which tells your body how to build the enzyme to activate folate.  This gene variant matters partly because it affects folate, but mostly because active folate makes SAMe in our body, and SAMe is the primary methyl donor. That means, when your body needs to methylate something, the first place it looks to get a methyl group is from SAMe, but SAMe had to get its methyl group from methylated folate, and you made methyl folate in your MTHFR enzyme.


If MTHFR isn't working so well, you can't activate (methylate) your folate, which means you can't make SAMe, which means all of the things you need to methylate with SAMe, like neurotransmitters, toxins, and your DNA, can't be methylated.


Here is that in graphic form:


How to Boost Your Methylation


Boosting methylation and taking good care of an MTHFR mutation look similar. Here are some basic things you can do:


  • Avoid folic acid.

  • Add methylfolate to your supplements.

  • Eat foods high in natural folate, such as dark green leafy vegetables, broccoli, asparagus, beans and pulses, and mangos.

  • Make sure you're getting enough riboflavin from your diet and supplements.

  • Cut back on alcohol - it uses up your folate.

  • Watch out for folate-gobbling prescriptions like birth control pills and hormone replacement therapy (you don't need to stop them, but you do need to get extra methyl folate to compensate for the extra use).

  • Get moderate exercise.

  • Make sure you have all of the B vitamins covered to help with things like cellular energy, etc. It doesn't help directly with methylation, but it helps you get what you want out of methylation.


Methylation is a foundational process for your body. You need it to make healthy neurotransmitters, to have cellular energy, to turn on and off segments of your DNA, and generally for everything your body does. The symptoms of methylation deficiencies are broad and widespread because they affect every body system, every area of health, and every part of your day and night. Working to balance your methylation can make a difference to how you feel today, how your body is able to respond to other therapies, and also your health risks in the future.

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Please Read: The information here is for educational purposes only. Please consult with your primary care physician before making changes to your diet, supplements, or pharmaceutical medications. If you are having a medical emergency, please call 911. Your life and health are precious.

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