FOLATE

The quiet nutrient that builds, renews, and keeps you mentally online — and the loudest marketing conversation in supplements right now.

Folate has a public-relations problem. It is most famous for one thing — pregnancy and neural tube defects — and most people stop thinking about it the moment that life-stage passes. Then a different conversation took over: MTHFR genes, methylated supplements, "you can't convert folic acid", direct-to-consumer testing kits. Somewhere in that shift, folate stopped being a nutrient and started being a category of marketing.

The biology hasn't moved. Folate does the same thing in your cells today that it did before any of those conversations existed. It builds DNA. It runs methylation. It recycles homocysteine. Without it, cells that should be dividing — the bone marrow making red blood cells, the gut lining renewing itself, the embryo forming organs — can't finish the job.

The biology hasn't moved. Folate does the same thing in your cells today that it did before any of those conversations existed.

What changed is what's being sold around it. The supplement industry built a story on top of folate that the underlying evidence stopped supporting somewhere between 2006 and 2017. The trials came back. The genetic studies came back. And in most of the conditions methylated B-vitamins were sold to prevent, the causal chain was broken at the outcomes link.

This article is about folate the nutrient, not folate the product category. It covers what folate does, why the form matters, what the MTHFR conversation gets right and wrong, why liver is one of the most folate-dense foods on earth — and where the evidence is genuinely strong, and where it isn't. The honest answer changes how you might think about it.

What Folate Actually Does

Folate is the body's one-carbon delivery system. It picks up single carbon atoms from amino acids and shuttles them to where they're needed for three core jobs.^{1, 2}

Building DNA. Your DNA is built from four letters — A, T, G, C. Three of them (A, T, and G) need folate-delivered carbons to be assembled. The fourth, C, your body builds through a different pathway. But three out of four — that's why cells can't divide properly when folate runs short.³ The bone marrow tries to make red blood cells, can't finish the DNA, and produces oversized, half-built cells instead. This condition has a name — megaloblastic anaemia — and it was the original clue, in the 1930s, that something specific in food was essential for blood formation.⁴

Running methylation. Methylation is the body's on/off dial for hundreds of cellular processes. Switching genes on or off. Building neurotransmitters like serotonin and dopamine. Making the membranes that hold every cell together. All of these depend on a steady supply of methyl groups — and folate is the upstream source. Over a hundred reactions in your body run on this supply.²

Recycling homocysteine. Methylation produces a by-product called homocysteine. The body recycles it back into methionine using folate and B12 working together. If either nutrient runs short, homocysteine builds up. (More on this further down — it's where the supplement industry has built and rebuilt the same broken story for thirty years.)

When folate runs short, the research shows the bone marrow is the first tissue to struggle. Red blood cell production stalls. The gut lining — which renews its entire surface every few days — begins to falter. In pregnancy, the consequences land on the embryo, where cell division is at its most rapid. What the person actually notices is slower and quieter than what the bloodwork would eventually show: persistent fatigue that doesn't respond to rest, breathlessness on light effort, paler skin, slower recovery, and a creeping decline in energy and mental clarity that often doesn't register on a standard blood test until it's well established.⁵

The Form Matters More Than the Quantity

Liver delivers folate as polyglutamated 5-methyl-tetrahydrofolate and tetrahydrofolate — the same forms your cells use internally.⁶

Liver delivers folate as polyglutamated 5-methyl-tetrahydrofolate and tetrahydrofolate — the same forms your cells use internally.

There are three forms folate appears in.

Food folate is what you find in liver, leafy greens, lentils, beans. It's already in reduced, polyglutamated form — the way your body stores and uses folate inside cells.⁷

Folic acid is the synthetic version added to fortified bread and most supplements — meaning it's chemically manufactured rather than extracted from food. It's fully oxidised and structurally simpler. It is not biologically active when you swallow it. It has to be processed by an enzyme called dihydrofolate reductase (DHFR) before your cells can use it. Human DHFR activity is low, individually variable, and saturable above roughly 200–400 µg per dose.^{8, 9} Above that threshold, unmetabolised folic acid (UMFA) appears in serum.

UMFA — unmetabolised folic acid — is folic acid that has entered the bloodstream without being converted to its active form. It's a sign the conversion bottleneck has been exceeded.

5-methyltetrahydrofolate (5-MTHF) is the active monoglutamate form — what folate becomes after several steps of processing. Methylated supplements deliver this directly, bypassing DHFR. The mechanism is sound: 5-MTHF reaches biomarker activity faster and produces less UMFA than folic acid.¹⁰

Liver folate is in the reduced, polyglutamated form already. It is structurally similar to what your cells store internally. It is not subject to the DHFR bottleneck that produces UMFA from synthetic folic acid. This is mechanistic reasoning, and it's where Somada will be honest: there is very little direct evidence comparing serum folate response to liver versus an equivalent dose of folic acid or methylfolate. The biochemistry is sound. The head-to-head trial doesn't exist in any robust form.

What does exist: roughly 95% of US adults have detectable UMFA in their blood, regardless of whether they take supplements, due to mandatory folic acid fortification of cereal grains in the US food supply.¹¹ The proposed harms of UMFA — reduced natural killer cell activity, cognitive interaction with low B12 — rest on observational studies, aged-mouse models, and one cross-sectional finding from 2006.¹² No randomised trial has confirmed clinical harm. What we'll say is: liver folate doesn't generate it, because it doesn't need DHFR. That's the difference.

The MTHFR Conversation

MTHFR is an enzyme. It converts one folate form into another at a single step in the cycle. The C677T variant produces a less efficient version of this enzyme. Roughly 65% activity in heterozygous carriers (one copy of the variant), about 30% in homozygous carriers (two copies).¹³ In the Australian population, around 10–12% of people are homozygous TT (the 30% activity group).

That much is real. What's been built around it, mostly isn't.

The supplement industry's MTHFR narrative usually goes like this: 40% of the population has an MTHFR mutation. Carriers can't convert folic acid properly. Without methylated folate, they can't methylate properly. Without methylation, they're at higher risk of heart disease, miscarriage, blood clots, depression, and cognitive decline. The solution is genetic testing and methylated B-vitamin supplementation.

Each of those claims has been examined and largely rejected by the relevant medical specialty bodies. The American College of Medical Genetics published a position statement in 2013 stating that MTHFR polymorphism testing has minimal clinical utility and should not be ordered as part of routine evaluation for thrombophilia, recurrent pregnancy loss, or family screening.¹⁴ The position has been reinforced by ACOG, the American Heart Association, the College of American Pathologists, and RANZCOG.¹⁵

The "40% need methylfolate" claim conflates two very different things. About 40% of Europeans carry one copy of the variant. Only 10–12% carry two. One copy has minimal functional consequence in folate-replete people — fortification largely abolishes the difference in homocysteine between genotypes.¹⁶

The "MTHFR causes disease" claims have been broken at the outcomes link by large genetic studies. A study of 156,253 Chinese adults found no association between MTHFR TT genotype and coronary heart disease.¹⁷ Multiple meta-analyses have found no causal link between MTHFR variants and venous thromboembolism, recurrent miscarriage in fortified populations, or breast cancer.^{18, 19}

The clinical advice from every specialty body that has reviewed the evidence is the same. Don't change folate intake based on MTHFR genotype. Adequate folate from food or standard supplementation is sufficient for nearly everyone, regardless of variant status.²⁰

The clinical advice from every specialty body that has reviewed the evidence is the same. Don't change folate intake based on MTHFR genotype.

This isn't to say MTHFR isn't real. It's an enzyme, the variants exist, and at the biochemical level they do what the genetics suggests. What's been overstated is the leap from "this enzyme works at 30% in vitro" to "you need genotype-targeted methylated supplementation". The data don't support that leap, and the bodies that would know — the medical geneticists themselves — have said so explicitly. We mention this because the MTHFR conversation is the entry point a lot of people use to start thinking about folate. Either way — worth a pause before acting on the marketing.

Homocysteine: A Marker, Not a Cause

Homocysteine is the most-cited and most-marketed argument for B-vitamin supplementation. The story has been told the same way for thirty years. It's worth understanding why it persists, because the evidence stopped supporting most of it almost two decades ago.

The original idea, from a 1969 paper, was reasonable. Children born with severe genetic homocystinuria — homocysteine levels above 100 µmol/L — develop early atherosclerosis. The hypothesis: maybe milder elevation does the same thing in adults. Through the 1990s, observational studies seemed to confirm it. A 1995 meta-analysis in JAMA found a 60–80% higher coronary risk per 5 µmol/L of homocysteine.²¹ The supplement industry locked in.

Then the hypothesis was tested properly. Five large randomised trials — HOPE-2, NORVIT, VISP, SEARCH, and WAFACS — gave folate, B12, and B6 to thousands of people and lowered homocysteine by 25–30%. None of them reduced heart attacks. None reduced cardiovascular death. None reduced major cardiovascular events. One trial signalled possible harm.^{22, 23} A 2017 Cochrane meta-analysis pooling 71,000 participants confirmed: no effect on heart attacks, no effect on mortality, only a small reduction in stroke.²⁴

None of them reduced heart attacks. None reduced cardiovascular death. None reduced major cardiovascular events.

Genetic studies did the same work from a different angle. People who carry MTHFR variants have lifelong slightly-elevated homocysteine — exactly the kind of natural experiment that should reveal whether elevated homocysteine causes heart disease. It doesn't. Multiple studies, including 116,000 participants pooled across 19 datasets and 156,000 Chinese adults followed prospectively, found no causal link between MTHFR-genotype-elevated homocysteine and coronary disease.^{16, 17}

The supplement industry never updated. The narrative had become commercially valuable, and the conferences, white papers, and direct-to-consumer education channels that built around methylated B-vitamins continued to cite the 1995–2005 observational literature as if the trials never happened.

What the evidence does support: homocysteine is a real marker of B-vitamin status. Adequate folate, B12, and B6 do help your body metabolise it normally. There is a narrower causal link to small-vessel and haemorrhagic stroke, neural tube defects (via the folate cycle), and non-alcoholic fatty liver disease.²⁵ What it doesn't support: the broad "lower homocysteine to prevent heart disease" claim that was the marketing foundation for a generation of supplements.

Folate, B12 and Iron — The Interlock

Folate doesn't work alone. Three nutrients are required for normal red blood cell formation, and they fail visibly together. Folate and B12 build the DNA. Iron builds the haemoglobin. When any of the three runs short, the bone marrow can't finish a complete red blood cell.^{4, 26}

Folate and B12 are particularly interlocked. The same enzyme — methionine synthase — needs both to do its job. If B12 runs out, folate gets stuck in one form (5-MTHF), can't move forward, and the cell becomes functionally folate-deficient even when total folate looks normal. This is the methyl-folate trap, and it's one of the few places where the mechanism has been replicated in vivo.⁵

The practical implication is that supplementing one of these three nutrients in isolation often misses the full picture. A high-dose folic acid supplement can correct the bloodwork picture of a B12 deficiency without correcting the underlying B12 problem — leaving the neurological consequences of B12 deficiency to progress unchecked. This is one of the better-established reasons to be cautious about high-dose isolated folic acid in older adults, particularly where B12 status is borderline.²⁷

Liver delivers all three together. Folate, B12, and copper (which moves iron through the body), in the same matrix, in the forms the body uses. Iron is also present in liver but it's not liver's strongest suit — beef spleen carries significantly more iron per gram, and it's the better tool when iron is the priority. The point isn't that one organ does everything. It's that organs evolved to hold multiple nutrients together because that's how they're used.

Wholefood Sources

Folate is widespread in the food supply, but the density varies enormously. Liver is in a league of its own among animal foods.

Sources: USDA FoodData Central²⁸; Czarnowska-Kujawska 2020 chicken liver vitamer-profile study⁶; Somada manufacturer testing 2025.

Two notes on the table. The USDA values for liver are conservative — they were measured using older microbiological assays that systematically underestimate true folate content by 2–4× compared with modern HPLC methods. The truer figure for beef liver is probably closer to 700–1,000 µg per 100g, but the USDA number is the cited regulatory figure and is what we use for honest comparison.

Folate is heat-sensitive and oxidation-sensitive. Boiling spinach loses 50–95% depending on time and temperature. The one published study examining cooking methods on chicken liver found gentle methods like steaming caused no significant folate loss; high-heat methods caused 8–42% loss.⁶ Freeze-drying — the method Somada currently uses — operates at low temperature and is mechanistically well-suited to preserving heat-sensitive nutrients. We don't claim "near-100% retention" because no published study has measured it in freeze-dried beef liver specifically.

Daily Requirements

Sources: FSANZ Standard 1.1.1 Schedule 1²⁹; NHMRC Nutrient Reference Values³⁰.

A note on the two columns. They're not contradictory — they're different tools.

The FSANZ RDI is set under the Australia New Zealand Food Standards Code and is the figure that all food packaging must use for percent-of-daily-intake claims. By regulation, this is what appears on every nutrition information panel in Australia. FSANZ Schedule 1 only sets RDIs for specific groups — adults, infants, and children aged 1–3. Other life-stages (pregnancy, lactation, older children) don't have FSANZ-issued values; the gaps in the table reflect that.

The NHMRC Nutrient Reference Values are the more recent, evidence-based intakes — broken out by age, sex, and life-stage, and updated to reflect modern nutritional science. The adult folate NRV (400 µg DFE) is double the FSANZ figure because the FSANZ value was set decades ago and has been retained for label consistency rather than updated.

Both numbers serve a purpose. The NRV is what you'd reference for evidence-based intake targets. The FSANZ figure is what we're legally required to use on the pack. We don't think this gap should be hidden — it's a quirk of how Australian food labelling has evolved, and one we'd happily explain in more detail in a future piece.

The upper level of 1,000 µg/day applies to folic acid from fortified foods and supplements. It does not apply to natural food folate.

Higher needs and at-risk groups:

Women planning pregnancy require 400 µg of folic acid daily for at least one month before conception and through the first 12 weeks of pregnancy (RANZCOG guidance). Women with prior neural tube defect pregnancies, on anti-epileptics, or with pre-existing diabetes require 5 mg daily under clinical supervision. Folate demand also rises in heavy menstrual bleeding, chronic alcohol intake, coeliac disease, IBD, and after bariatric surgery. Older adults are a special case where B12 status matters as much as folate intake.

A Word on Pregnancy

The 1991 MRC Vitamin Study — a randomised trial across 33 centres in seven countries — established that folic acid supplementation periconceptionally reduces neural tube defect recurrence by about 72%.³¹ Mandatory folic acid fortification in Australia, in place since 2009, has reduced neural tube defects by around 14% overall and around 74% in Aboriginal and Torres Strait Islander women.³² This is one of the most successful population health interventions of the last 50 years.

Folate matters in early pregnancy — the embryo's enormous demand for DNA building blocks during cell division, the closing of the neural tube around day 28 — is the clearest illustration of why folate matters in any cell that divides. The same biology that builds an embryo builds your bone marrow, your gut lining, your immune cells. Speak to your GP or midwife about your prenatal nutrition, including whether liver-based foods or supplements are appropriate for your situation.

What Affects Absorption

Food folate absorbs at roughly 50% of the efficiency of synthetic folic acid taken with food, per the dietary folate equivalent (DFE) framework used by NHMRC and FSANZ.³⁰ But this is a population average derived from mixed-diet studies, dominated by plant sources. It doesn't necessarily apply to organ meats, where folate is in a more bioavailable form.

What's well-established about absorption:

• Heat and oxidation degrade folate. High-heat cooking can lose 50–95% depending on the food and method.
• Vitamin C modestly improves stability during digestion by reducing oxidation of the reduced folate forms.
• Alcohol impairs absorption and increases excretion. Chronic alcohol intake is one of the more reliable causes of marginal folate status.
• Some medications — methotrexate, sulfasalazine, certain anti-epileptics — interfere with folate metabolism. These are clinical-context conversations, not nutrition-label conversations.
• Gut conditions (coeliac, IBD, post-bariatric) reduce absorption mechanically. This is where wholefood vs synthetic forms make the most measurable difference.

What's less established: any quantitative claim that one form is "more bioavailable than another" by a specific percentage. The honest answer is the form matters, but the numbers cited in marketing usually overstate the precision of the underlying evidence.

Common Questions

Should I take methylfolate instead of folic acid?

If you're pregnant or trying to conceive, the answer from every major medical body is: take folic acid. That's because trials are in folic acid. There is no head-to-head trial showing methylfolate prevents NTDs better. For everyone else, the question becomes more about food versus supplements generally. We believe nature can supply all the nutrients our bodies need for normal function.

Does my MTHFR result mean I need a special supplement?

According to the medical geneticists who would know — no. The American College of Medical Genetics, ACOG, the American Heart Association, and RANZCOG all advise against ordering MTHFR tests for routine evaluation, and explicitly advise against changing folate intake based on the result. If you've already had the test, the standard advice is to focus on adequate folate intake from food, the same as anyone else.

Is unmetabolised folic acid (UMFA) actually harmful?

The honest answer: we don't know. UMFA is real, it's measurable, and it's present in nearly every adult who eats fortified bread. The proposed harms — immune effects, cognitive interaction with low B12 — are based on observational and animal studies. No randomised trial has confirmed clinical harm. Somada's position is that food folate doesn't generate UMFA in the first place, which sidesteps the question.

Can I get enough folate from food alone?

For most adults, yes — provided your diet contains some combination of liver, leafy greens, legumes, or fortified grains. Folate deficiency in developed countries is now rare in the general population. The harder questions are about specific life-stages and conditions: pregnancy, where supplementation is non-negotiable; older adults, where B12 status matters as much; and people with gut absorption issues, where wholefood forms may be the more reliable option.

Bringing It All Together

Folate is a delivery system that runs through every cell that has to divide — bone marrow, gut lining, immune cells, embryos. The form it arrives in matters. The other nutrients it works with matter. The cycle it runs in matters more than the specific molecule on a supplement label.

Wholefoods solve a problem that supplement formulators are still arguing about. Liver delivers folate in the polyglutamated, reduced forms your cells store internally. It arrives alongside B12, which is required for the cycle to function. It bypasses the DHFR bottleneck that produces UMFA from synthetic folic acid. The mechanism is sound, even where the head-to-head trial data is missing. Somada's position is that this is the more conservative case, not the more aggressive one — food folate doesn't require you to take a position on questions the evidence hasn't settled yet.

If you want a practical starting point: get folate from food first. Liver, leafy greens, legumes, fortified grains where they're part of your diet. Pay attention to what you're cooking and how. If you're considering a folate supplement, the question worth asking isn't which form — it's whether you actually need one, and what's missing from your food that you're trying to fix.

This article provides general nutrition information only and is not intended as medical advice. If you have concerns about your folate levels, B-vitamin status, or pregnancy supplementation, consult a qualified health practitioner.

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