What Both Parents Can Do Before Conception

If you are thinking about having a baby, you are probably hearing advice from everywhere: your doctor, family and friends, podcasts, social media, books, and now AI.

There is more information available than ever before, certainly more than when I had my boys, who are now grown men. Some of it is incredibly helpful. Some of it is confusing. And when recommendations about food, supplements, fertility, toxins, and genetics conflict, it can be hard to know what actually matters.

That is one of the reasons I wrote The Preconception Revolution. The mission is to create a movement to help future parents sort through the noise and understand one of the most empowering messages in preconception care:

What you do in the months before conception can make a meaningful difference.

We now have growing evidence that the health, nutrition, metabolism, and environmental exposures of both parents before conception can influence fertility, pregnancy, and the earliest stages of a baby's development.

One of the important biological pathways connecting these pieces is methylation.

Methylation helps your body make and repair DNA, regulate how genes are expressed, process hormones and brain chemicals, support antioxidant defenses, and manage homocysteine.

And around conception, these processes become especially important.

I often describe preconception health as preparing the soil before planting a seed. By the time pregnancy begins, an extraordinary amount of biology is already underway. Supporting egg and sperm health and the biological environment in which conception occurs gives us an opportunity to build the healthiest foundation possible.

Of course, we cannot control every outcome.

But there is an important difference between controlling an outcome and influencing biology in a healthier direction.

That is what true preconception care is about.

My hope is that understanding why these steps matter will make them feel less like an overwhelming list of recommendations and more like intentional choices for your fertility, pregnancy, and future baby.

In this article, I will explain:

What methylation is
Why it matters for fertility and pregnancy
How methylation influences early development and epigenetics
Why the health of both parents matters
How nutrition, lifestyle, genetics, and environmental exposures can affect methylation
Which nutrients and tests may help personalize your approach

What Is Methylation?

Methylation is the transfer of a small chemical tag called a methyl group.

This simple chemical reaction happens throughout the body and supports some of our most fundamental biological functions.

Methylation helps your body:

Make and repair DNA
Regulate which genes are active
Process certain hormones and neurotransmitters
Support antioxidant defenses
Process homocysteine
Support normal cellular growth and repair

Methylation is part of a larger network called one-carbon metabolism. Think of this as a series of interconnected pathways that continually provide, use, and recycle the raw materials our cells need.

These pathways are closely connected with antioxidant and detoxification systems.

For example, methylation-related pathways help the body produce glutathione, one of our most important antioxidants. They depend on adequate B vitamins, choline, amino acids, magnesium, zinc, and other nutrients.

When those nutrients are inadequate, or the body is dealing with inflammation, oxidative stress, poor absorption, or significant environmental exposures, the system may not work as efficiently.

Before conception, this matters because these same pathways help protect and support eggs and sperm.

Figure 1. An overview of the methylation cycle.

How the Methylation Cycle Works

The methylation cycle is designed to recycle itself.

It begins with methionine, an amino acid found in protein-containing foods.

Methionine is converted into SAMe, or S-adenosylmethionine, one of the body's primary methyl donors. SAMe delivers methyl groups for processes including DNA regulation and repair.

After SAMe donates its methyl group, it eventually becomes homocysteine.

With adequate folate, vitamin B12, choline, and betaine, homocysteine can be recycled back into methionine so the cycle continues.

Vitamin B6 can also help move homocysteine into another pathway involved in producing glutathione.

This is why methylation is not simply an “MTHFR problem” or a folate problem.

It is an interconnected system.

The body needs protein and amino acids along with folate, B12, B6, B2, choline, betaine, magnesium, zinc, and other nutrients.

Before conception, these pathways support egg and sperm health. Once pregnancy begins, they become important for rapid DNA production, cell division, placental function, fetal growth, and development.

Nutrients That Support Healthy Methylation

There is no single food or supplement that “fixes” methylation.

The body needs a team of nutrients working together.

Nutrient	Why it matters	Food sources
Folate + B12	Help recycle homocysteine and support DNA synthesis	Leafy greens, asparagus, avocado, citrus; eggs, seafood, meat, liver
Riboflavin (B2) + B6	Support key enzymes in methylation and antioxidant pathways	Eggs, fish, poultry, mushrooms, leafy greens, almonds
Choline + betaine	Provide another route for recycling homocysteine; choline is also important for cell membranes	Eggs, liver, beets, spinach, seafood, poultry, beans
Methionine + glycine	Provide amino acids involved in SAMe and glutathione metabolism	Protein-rich foods, collagen, gelatin
Magnesium + zinc	Support numerous enzymes throughout these pathways	Leafy greens, nuts, seeds, shellfish, meat, poultry

Why Choline Matters Before and During Pregnancy

Choline deserves more attention than it often receives.

It plays important roles in methylation, cell membranes, brain development, and nervous-system development. Requirements increase during pregnancy, yet many prenatal vitamins contain very little choline or none at all.

Do not assume your prenatal contains enough. Check the label.

And a quick note about folate: folate is the general term for vitamin B9. Folic acid is the synthetic form commonly used in fortified foods and many supplements. Methylfolate is a biologically active supplemental form and is the form I recommend s clinically.

Why Methylation Matters for Fertility, Pregnancy, and Your Baby

This is where methylation becomes especially fascinating.

Nearly every cell in your baby's body will contain essentially the same DNA.

A brain cell and a liver cell become different not because they received different DNA, but because different parts of that DNA are being used.

That is part of what we mean by epigenetics.

Think of DNA as the instruction manual and epigenetics as the system that tells the body which pages to read, when to read them, and how loudly to read them.

DNA methylation is one of the primary ways the body helps regulate that process.

Around conception and during very early embryonic development, there is extensive epigenetic programming and reprogramming. This is happening while cells are dividing rapidly and beginning to develop into the brain, nervous system, immune system, placenta, and other tissues.

A methylation change is not automatically good or bad.

What matters is where it occurs, when it occurs, and which genes are affected.

But research increasingly shows that parental nutrition, metabolic health, and environmental exposures around conception can influence these processes.

Human studies have linked maternal levels of methylation-related nutrients around conception with measurable methylation differences in offspring. Research on choline during pregnancy has also shown that maternal intake can influence methylation and activity of genes involved in the fetal stress-response system.

These studies do not tell us that one nutrient can guarantee one particular health outcome.

What they do tell us is important:

The nutritional environment surrounding conception and pregnancy can leave measurable biological signals in the developing baby.

Why the Father's Health Matters Too

For many years, preconception advice focused almost entirely on women.

That needs to change.

Egg and sperm each contribute half of the DNA required to create a baby. But sperm carry more than DNA alone. They also carry epigenetic information that may help influence the earliest stages of development.

That means a father's health before conception matters too.

For example, a 2026 study following more than 11,000 couples found that higher red-blood-cell folate before conception in both mothers and fathers was associated with a lower risk of spontaneous pregnancy loss.

Because this was observational research, it cannot prove that increasing folate prevents miscarriage. But it adds to growing evidence that the nutritional health of both partners matters before conception.

This is why one of my most important messages to couples is: Preparation takes two.

Both parents can use this window to improve the biological environment in which conception occurs.

What Can Interfere with Methylation?

Methylation depends on adequate nutrients, functioning enzymes, and the larger environment of the body.

Factors that may interfere include:

Low intake or poor absorption of folate, B12, B6, B2, choline, protein, magnesium, or zinc
Vegan or restrictive diets without adequate supplementation
Digestive conditions that interfere with nutrient absorption
Frequent alcohol use
Smoking
Chronic inflammation or illness
High oxidative stress
Certain medications that affect folate or B12
Environmental exposures
Genetic variants such as MTHFR

I want to emphasize this because I see people become unnecessarily frightened by genetic test results:

An MTHFR variant is not a diagnosis.

It does not mean your methylation is “broken.”

Your genes are one part of a much larger picture that includes nutrient status, digestion, inflammation, metabolic health, environmental exposures, lifestyle, and other factors.

Environmental Toxins, Methylation, and Fertility

This is an area that deserves much more attention in preconception medicine.

Research increasingly suggests that environmental exposures can influence epigenetic regulation during pregnancy and potentially before conception.

Prenatal exposures to substances including lead, mercury, arsenic, cadmium, cigarette smoke, and air pollution have been associated with differences in DNA methylation in the placenta, cord blood, or children's blood.

Some of these differences occur near genes involved in:

Fetal growth
Inflammation
Energy production
DNA repair
Nervous-system development
Cellular signaling
Organ development

Even relatively low-to-moderate prenatal lead exposure has been associated with placental methylation differences near genes involved in nervous-system development and cell signaling.

Researchers have also identified methylation differences in pregnancies affected by gestational diabetes, preeclampsia, and fetal growth restriction.

That does not mean methylation caused these complications.

More likely, we are seeing complex interactions among metabolism, inflammation, nutrient status, environmental exposures, genetics, placental biology, and the body's response to pregnancy.

Mitochondrial health matters too - learn more here.

Environmental Exposures and Sperm Health

Evidence is also growing on the paternal side.

A 2024 study of men preparing for conception found associations between markers of phthalate exposure and changes in sperm DNA methylation.

Some of the affected regions were near genes involved in sperm function, hormonal signaling, and early embryo development.

This does not prove that a single exposure causes a particular outcome in a baby.

But it provides another possible mechanism through which a father's health and environmental exposures before conception matter.

The Goal Is Not Fear

When people first learn about environmental toxicants and epigenetics, it can feel overwhelming.

That is not how I want you to use this information.

I see it as empowering.

Our biology is responsive.

We can improve nutrition. We can improve blood sugar. We can sleep better. We can address inflammation. We can support antioxidant defenses. And we can reduce many unnecessary exposures.

We do not need perfection to make meaningful changes.

To learn more about environmental exposures and fertility, download How to Conceive a Healthy Baby in a Toxic World.

How to Support Methylation Before Conception

You do not need to become an expert in biochemistry.

Start with the foundations.

1. Eat a Nutrient-Dense, Diverse Diet

Prioritize:

Leafy greens
Cruciferous vegetables
Eggs
Seafood (low-mercury)
Quality animal or plant proteins
Colorful (organic) vegetables and fruits
Nuts and seeds
Foods rich in choline, magnesium, zinc, B vitamins, and amino acids

Food gives the body nutrients in combinations that work together across multiple pathways.

2. Improve Metabolic Health

I consider metabolic health an important part of fertility care.

Insulin resistance, frequent glucose spikes, inflammation, and oxidative stress can all affect reproductive biology.

A 2025 preconception study found that higher folate and lower homocysteine were associated with a greater chance of conception, with the relationship appearing stronger in women with lower insulin resistance.

To support metabolic health, focus on:

Adequate protein
Fiber-rich whole foods
Fewer refined carbohydrates and added sugars
Eliminate processed foods including seed oils
Movement, especially after meals
Restorative sleep
Stress regulation

For some people, a continuous glucose monitor can be a useful short-term tool because it shows how your body responds to food, sleep, exercise, and stress.

3. Review Supplements for Both Partners

Folate matters, but methylation is not just about folate.

Consider:

Vitamin B12
B6
Riboflavin
Choline
Magnesium
Zinc
Glycine
Adequate protein and amino acids

And yes, men need intentional preconception nutrition too.

4. Make Sure You Are Absorbing Nutrients

You can eat a beautiful diet and take excellent supplements, but those nutrients still have to be absorbed.

If B12, folate, iron, or other nutrients stay low despite adequate intake, you may need to look deeper and look for why.

Digestive disease, intestinal inflammation, medications, altered gut health, and other conditions can interfere with absorption.

The goal is not simply to keep adding supplements.

It is to understand what the body needs and what may be getting in the way.

5. Reduce Environmental Exposures

Start with the exposures you can change.

Eliminate tobacco
Avoid or reduce Alcohol
Drink filtered water
Avoid plastic food packaging
Avoid plastic bottles
Avoid aluminum and non-stick cookware
Replace personal-care products with natural options
Eliminate harsh cleaning products
Reduce occupational exposures

The goal is to reduce as many as you can.

6. Support Natural Detoxification

Your body is detoxifying every day through the liver, kidneys, gastrointestinal tract, lungs, skin, and antioxidant systems.

Support those systems with:

Adequate protein
Fiber
Hydration
Regular bowel movements
Cruciferous vegetables
Movement
Nutrients that support liver and antioxidant pathways such as glutathione
Targeted liver support and/or binders

7. Look for Sources of Inflammation

Chronic inflammation increases oxidative stress and can affect many pathways involved in reproductive health.

Contributors may include:

Gut dysfunction
Chronic or unresolved infections
Food reactions
Metabolic dysfunction
Poor sleep
Periodontal disease
Environmental exposures
Other inflammatory conditions

One of the principles that has guided my medical practice for years is to keep asking:

Why is this happening?

Whenever possible, I want to identify and address the underlying contributor rather than simply treat the downstream symptom.

8. Use Testing When It Will Change What You Do

Testing is most helpful when it leads to a better decision.

Foundational methylation-related testing may include:

Complete blood count
Vitamin B12
Methylmalonic acid when B12 status is unclear
Folate or red-blood-cell folate
Homocysteine

For some patients, more comprehensive nutrient, metabolic, or genetic testing such as the Genova Diagnostics NutrEval or Methylation Panel and genetics may provide additional useful information.

I always interpret these results in the context of the whole person.

A genetic variant by itself does not tell me what is happening metabolically.

Additional evaluation may be especially useful with:

Unexplained infertility
Recurrent pregnancy loss
Concerns about egg or sperm quality
A previous neural-tube-defect-affected pregnancy
Digestive disease or suspected malabsorption
Bariatric surgery
Vegan or restrictive diets
Medications affecting folate or B12
Abnormal B12, folate, methylmalonic acid, homocysteine, or blood counts

Targeted Supplements for Methylation and Preconception Health

Supplements can be helpful during the preconception period, particularly when they are selected based on what an individual actually needs.

Several Every Baby Well® formulas were designed around the pathways discussed in this article:

Methylation Support
Provides broad-spectrum nutrients that support multiple steps in the methylation cycle.

Methyl B12 + Folate
Combines active forms of B12 and folate, which work together in recycling homocysteine.

Magnesium Glycinate
Provides magnesium for enzymes involved in methylation and other metabolic pathways, along with glycine.

Pure Glycine
Provides glycine, an amino acid used in glutathione production and other metabolic processes.

Phosphatidylcholine
Provides choline, which supports cell membranes, fetal development, and homocysteine metabolism.

Liposomal Glutathione
Provides direct support for one of the body's most important antioxidant systems.

Clean Beginnings + Preconception Detox
Provide nutritional and antioxidant support for the body's natural detoxification pathways.

Women's Wellness + Fertility Force and Men's Wellness + Fertility Force
Provide broader preconception nutritional support for each partner.

Fertility Fuel + PreConceive Nutrition
Provide quality protein and amino acids used in methylation, glutathione production, hormone production, and egg and sperm health.

You Do Not Have to Do Everything at Once

This may be the most important message.

You do not need perfect genes.

You do not need a perfect diet.

You do not need to live in a toxin-free bubble.

And you certainly do not need to change everything overnight.

The body is remarkably responsive.

Every meaningful step you and your partner take: improving nutrient status, stabilizing blood sugar, sleeping better, reducing exposures, addressing inflammation, improving sperm health, supporting egg health can help move your biology in a healthier direction.

The preconception window gives us time to do that work before pregnancy begins.

And many of the same pathways that influence reproductive health, such as mitochondrial function, metabolic health, inflammation, oxidative stress, detoxification, and epigenetic regulation, also influence how we age.

That is why fertility and longevity are more connected than they may first appear.

The biology that supports fertility is also deeply connected to the biology of long-term health.

Improving your health before conception can benefit you today, enhance conception, and help give your future child the healthiest foundation possible.

That is the beauty of the opportunity of utilizing these preconception strategies.

Looking for More Support?

The Every Baby Well® Preconception + Fertility Program provides a step-by-step approach to putting these principles into practice.

It is designed to help both partners strengthen egg and sperm health, support methylation and mitochondrial function, improve metabolic health, reduce avoidable environmental exposures, and identify factors that may be interfering with fertility or a healthy pregnancy.

For a deeper understanding of why this window matters, read The Preconception Revolution.

It brings together the science of fertility, epigenetics, environmental health, and personalized medicine with practical strategies couples can begin using now.

Because preparing for a healthy baby does not begin with a positive pregnancy test.

It begins well before conception.

How Methylation Influences Fertility, Pregnancy, and Your Future Baby’s Health