Thorne 5-MTHF 1 mg Review

5-MTHF 1 mg from Thorne is a 60-serving bottle of capsules that supplies 1 mg of 5-methyltetrahydrofolate, a bioactive, methylated form of folate, an essential B vitamin. The product is presented as a supplement to support heart health, fetal development, nervous system and mood. According to the page, 5-MTHF is a bioactive, methylated form of folate that supports heart, brain, blood, and bone health and is suitable for individuals with MTHFR gene mutations. Each serving is one capsule and each container holds 60 servings. The ingredient panel lists Folate (as L-5-Methyltetrahydrofolate) at 1.7mg DFE per capsule. Other ingredients are Leucine, Microcrystalline Cellulose, Silicon Dioxide, and Hypromellose derived from cellulose for the capsule shell. The details section explains that folate is a key component in the body's methylation cycle, a series of biochemical reactions that play a beneficial role in multiple body systems. Heart and brain health, cellular energy production, fat metabolism, liver detoxification, and bone health all rely on a healthy methylation cycle. The page states that approximately 60 percent of U.S. adults have a genetic variation that makes it difficult for their methylation cycle to function optimally, and that for these individuals methylated vitamins such as Thorne's 5-MTHF provide essential nutritional support. The listed benefits include nutritional support for individuals who have an MTHFR gene mutation, support for production of key neurotransmitters including serotonin, melatonin, dopamine, and epinephrine, promotion of cardiovascular, brain, and bone health by maintaining a healthy methylation cycle and a normal homocysteine level, support for healthy fetal brain and spinal cord development, and promotion of blood and nerve cell health. Listed features include suitability for individuals with an MTHFR gene mutation, active methylated folate that the page says gives the body the highest benefit with the least additional work, a 1 mg dose the page recommends for support of fetal development during pregnancy, and easy-to-take small capsules. The page states the product has been third-party tested and certified to verify that what is in the package matches the label and that it contains no unsafe levels of contaminants such as heavy metals, pesticides, and microorganisms. Purchase options include a one-time purchase at $24 for 60 capsules, or $21.60 with a subscription at 10% off, with several delivery frequencies available. Other strengths and sizes listed are 5-MTHF 5 mg and a 90-serving 1 mg option. Warnings state that the product is contraindicated in individuals with a history of hypersensitivity to any of its ingredients. Pregnant individuals are told to consult a health-care practitioner before use. The page notes that 5-methyltetrahydrofolate supplementation is not recommended concurrent with a med cancer therapy, as it can interfere with a med's anti-neoplastic activity, while an individual taking a med for psoriasis or rheumatoid arthritis can safely take a supplement containing folate.

Product Focus: MoodAlso covers:Brain
Tier ⓘ
Tier 2
Tier 2 · Researched. Human studies show improvement in an aging-related function or a specific goal, and the reviews agree. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
88 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
94% of 9,165
Biohacker Mentions
10 of 10
Cost per month
$12

Study, Trial or Testing Result Summary

Members Only50 human studies · 23 improved
50 human studies23 improved14 no effect47,064 people studied

This product gives folate as methylfolate, the active form of the vitamin. Each capsule gives 1.7 milligrams of dietary folate equivalents, above the 500 micrograms that helped in one trial, so it is at a full dose. The strongest evidence is for folate added to a med medicine. A 2025 pooled analysis of 192 trials with 17,437 adults found added folate eased depression more than medicine alone [1]. A 2020 analysis of nine trials with 1,061 adults agreed, with side effects similar to placebo [2]. A 2022 analysis of about 500 adults found a modest benefit from the methylfolate form added to meds [3]. A review of 20 trials with 2,256 adults found folate forms, with other B vitamins and vitamin D, lowered depression scores [4]. Not every study agreed. A 2014 trial of 475 adults found 5 milligrams of folic acid for 12 weeks did not improve mood when added to meds [5]. A seven year trial of 4,331 older women found folic acid with vitamins B6 and B12 did not prevent depression [6]. Most of the support is for people already taking a med medicine, not for preventing low mood in healthy people. Animal and cell studies are never counted.

See all 50 studies →Hide the studies

Review Totals and Summary

Members Only9,165 reviews · 94% positive
9,165 reviews · Amazon 4,139 · Store.mayoclinic 2,395 · Clearspringrx 2,395 · Thorne 136 · Walmart 100
94% positive3% neutral3% negative

"Thorne 5-MTHF 1 mg" has garnered about 4375 ratings across various stores, with an overwhelmingly positive reception. A significant 93% of rated reviews give it 4 or 5 stars, indicating high customer satisfaction. **What it did for them** Many customers report significant positive changes after taking this supplement. Users describe improved cognitive function, with one stating, "My brain feels clearer!" and another noting "Faster thinking." Beyond mental clarity, many experience a general boost in well-being and energy. Customers say it "makes me feel great" and noticed "a difference in my overall health and energy." It has been helpful for specific health concerns, with some using it for a "chronic condition" or to address "digestive issues and deficiencies." Others found it effective for improving "folate levels" or simply to keep their "body needs to keep balanced." A common sentiment is trust in the brand, with users saying, "Love thorn products" and "Thorne is top of the line quality." **Complaints** While feedback is largely positive, some concerns emerged. A notable complaint centers on dosage clarity, with one customer expressing frustration that the product "is not 5mg. it is in fact 1mg," feeling it was "very misleading" as they expected a higher dose. Another customer reported issues with "Delivery of products," stating they "always have to wait for them to get here on time." **Taste, smell, pill size, or form** The capsules are generally well-received for their physical attributes. Many customers appreciate that "The capsules are small so they are easy to swallow." Store summaries also confirm that customers find the supplement "small and easy to take." There are no complaints about the taste or smell of the capsules in the feedback provided. **Value for money** The perception of value is closely tied to the dosage issue. The customer who expected a 5mg dose but received 1mg felt the product was poor value, noting it was the "same price as the manufactures site and I will have to take 5 pills a day" to achieve their desired dosage. Otherwise, the high praise for Thorne's quality suggests that many customers find the product's benefits justify its cost. **Who it seems to suit and who it did not** This supplement appears to suit individuals looking to support brain function, improve energy levels, and enhance overall well-being. It is particularly helpful for those with specific needs like managing a "chronic condition," addressing "digestive issues and deficiencies," or improving "folate levels." People concerned about their MTHFR gene also found it beneficial, with one user saying it "puts my mind at ease." However, it did not suit a customer who was expecting a 5mg dose based on their interpretation of the product information, leading to disappointment and a feeling of being misled about the actual 1mg strength.

Biohacker Summary

Members Only10 of 10 recommend it
10 of 10 biohackers on our panel recommend it

Folate is the only ingredient here, and all ten panelists spoke about it: five lean toward recommending it, while the rest are neutral, though several of those still take it or praise it. The most common reason is to lower homocysteine, and others mention brain health, mitochondrial function, pregnancy and fertility, and mental health. Most who name a form prefer methylfolate over synthetic folic acid, especially people with the MTHFR gene variant or poor methylation, and one panelist takes the lower of two available strengths once a day. Cautions came from two panelists: one says many people feel muscle tension and anxiety on methylfolate, and another says many people overdo it, with blood levels maxing out and overstimulation when paired with creatine. Others point to food sources like dark leafy greens, liver and legumes, and some pair it with B12, B6 and other B vitamins.

See all 10 biohackers →Hide the biohackers
  • Dr. Mark Hyman · Folate · neutral
    • 21 Oct 2026 · neutral · YouTube ↗
      Notes that taking folate can lower homocysteine levels, which has shown health benefits and physical improvements in brain scans in clinical trials.
    • 19 Oct 2026 · neutral · YouTube ↗
      Notes that some people may need a little bit extra folate with a supplement.
    • 31 Aug 2026 · uses · YouTube ↗
      Optimized a child's nutrient status with folate, as the child had low folate levels and was not eating greens.
    • 28 Jul 2026 · neutral · Facebook ↗
      Notes that a med depletes folate.
    • 22 Jul 2026 · recommends · YouTube ↗
      States that folate is a nutritional deficiency that impacts mental health.
    • 8 Jul 2026 · uses · YouTube ↗
      Recounts giving a patient with MCI high-dose methylfolate, along with B12 shots and B6, which completely cured her MCI.
    • 29 Jun 2026 · recommends · Facebook ↗
      Recommends folate with vitamin B6 and B12 as supplements with strong evidence for PMS.
    • 3 Jun 2026 · recommends · YouTube ↗
      Explains that folate metabolism is very involved in neurotransmitter function and mood, and that folate can be a treatment for some cases of depression, especially for those with MTHFR genetic variants.
    • 16 Mar 2026 · recommends · Podcast ↗
      Explains why methylated folate matters and differentiates it from folic acid in the context of prenatal vitamins.
    • 28 Jan 2026 · recommends · YouTube ↗
      Recommends folate for male fertility, stating it targets cellular damage.
  • Dr. Eric Berg · Folate · neutral
    • 19 Oct 2026 · neutral · YouTube ↗
      Notes that birth control pills deplete the body of folate, which is needed for the brain to make serotonin.
    • 3 Sep 2026 · neutral · Facebook ↗
      Dr. Berg mentions that fermented dairy contains vital nutrients, including folate.
    • 3 Aug 2026 · recommends · Facebook ↗
      States that folate is a co-factor or nutrient involved in making melatonin.
    • 3 Jul 2026 · recommends · YouTube ↗
      States that if one is deficient in folate, cells cannot repair, and recommends dark leafy green vegetables, liver, and avocados as good sources.
    • 19 Jun 2026 · neutral · Instagram ↗
      Mentions that fermented dairy provides vital nutrients such as folate.
    • 23 May 2026 · neutral · Instagram ↗
      States that Folate (vitamin B9) repairs DNA, helps prevent cancer, and supports melanin production.
    • 23 Oct 2025 · neutral · YouTube ↗
      Mentions that eggs contain folate, which is beneficial for methylation, DNA repair, detoxification, and neurotransmitter production, particularly for those with genetic predispositions.
    • 8 Oct 2025 · neutral · Podcast ↗
      Mentions a trial where synthetic folate boosted IQs by 25% to 50% compared to a placebo.
    • 27 Sep 2025 · recommends · YouTube ↗
      Mentions recommending natural methylfolate for an average person, noting that it handles one pathway, while the synthetic version handles multiple pathways and bypasses absorption barriers.
    • 30 Aug 2025 · recommends · YouTube ↗
      Recommends ensuring sufficient folate intake, as a deficiency can cause DNA damage similar to radiation exposure, and suggests getting it from dark leafy green vegetables or liver.
  • Dave Asprey · Folate · neutral
    • 17 Oct 2026 · neutral · Facebook ↗
      States that folate can affect how the body responds to a supplement.
    • 5 Aug 2026 · recommends · Facebook ↗
      Recommends methylfolate as a better option than folic acid.
    • 11 Jun 2026 · recommends · YouTube ↗
      Dave Asprey notes that 80% of their clients have a problem absorbing certain forms of folate, and when the exact form of folate or folinic acid is dialed in, clients experience shifts, with the brain waking up as one of the first improvements.
    • 10 Apr 2026 · neutral · Podcast ↗
      Dave breaks down why a daily stack of taurine, B6, folate, and B12 works for motivation when either ingredient alone doesn't.
    • 1 Jan 2026 · warns · YouTube ↗
      Warns that many people who take methylfolate experience muscle tension and anxiety from it, suggesting it's not always the right form for methylation issues.
    • 26 Aug 2025 · neutral · YouTube ↗
      Notes that not everyone can metabolize methylfolate.
    • 19 Aug 2025 · warns · YouTube ↗
      Warns against taking methyl folate, stating that it causes muscle cramping throughout the body and that overmethylating is a nasty sensation.
    • 6 Mar 2025 · recommends · YouTube ↗
      States that most people can use methylfolate as their best brain source for making neurotransmitters, and mentions studies showing 15 milligrams was effective for depression with no side effects.
    • 6 Feb 2025 · recommends · YouTube ↗
      Explains that methylfolate is the bioactive form of folate required for DNA replication and that deficiency can impair peristaltic activity in the gut.
    • 4 Feb 2025 · neutral · YouTube ↗
      Discusses the potential to simulate the effects of adding more methylfolate to a virtual body based on personal genetics.
  • Ben Greenfield · Folate · recommends
    • 12 Oct 2026 · recommends · Facebook ↗
      Recommends methylfolate as an active form of folate that the body can use directly without conversion.
    • 9 Jul 2026 · recommends · YouTube ↗
      Recommends bioavailable folate, not synthetic folic acid, as folate deficiencies seem to impact hearing health in older individuals.
    • 18 Apr 2026 · recommends · YouTube ↗
      Recommends introducing methylfolate into the diet to address high homocysteine levels.
    • 8 Jan 2026 · neutral · Facebook ↗
      Would refine the guidelines to include clearer distinctions between synthetic folic acid and natural folate.
    • 11 Oct 2025 · neutral · YouTube ↗
      Notes that some people do better on certain forms of B12, B complexes, SAM E, and methylated folates, specifically five methyl folates, for methylation.
    • 29 Nov 2024 · recommends · YouTube ↗
      Notes that magnesium requires co-factors like B12 and folate to work, and BiOptimizers has considered these nutrients to help lower homocysteine levels and protect against DNA damage, promoting better health and longevity.
    • 11 Apr 2024 · warns · YouTube ↗
      Warns of folate deficiency on a carnivore diet, as it is low in meat but found in organ meats like liver, heart, kidney, and thymus glands.
    • 8 Feb 2024 · recommends · YouTube ↗
      Ben recommends treating methylation deficits with bioavailable sources of natural folic acid like methylfolate or methyl tetrahydrofolate.
    • 2 Dec 2023 · recommends · YouTube ↗
      Recommends looking for methyl tetrahydrofolate (MTHF) as an alternative to folic acid in supplements and foods, as it does not cause the negative effects associated with synthetic folic acid.
    • 26 Oct 2023 · recommends · YouTube ↗
      Ben discusses the debate on folic acid versus methyltetrahydrofolate, agreeing with Ivor that folate or MTHF is the preferred form.
  • Dr. Rhonda Patrick · Folate · recommends
    • 28 Sep 2026 · recommends · YouTube ↗
      Recommends ensuring adequate methyl folate intake, ideally through a prenatal vitamin, for women preparing for IVF.
    • 20 Aug 2025 · neutral · Instagram ↗
      Notes that dark leafy greens are a great source of folate.
    • 27 Dec 2023 · recommends · YouTube ↗
      States that for his mother, who is homozygous for MTHFR, methyl folate along with a high dose B supplement is necessary to prevent her homocysteine and blood pressure from going high.
    • 30 May 2016 · neutral · YouTube ↗
      Dr. Patrick mentions that her smoothie is rich in folate, which is required for producing thymine and prevents DNA strand breaks.
    • 11 Aug 2015 · uses · YouTube ↗
      Has experimented with L-methylfolate in the past to lower homocysteine, as he is a poor methylator.
    • 19 Mar 2015 · recommends · YouTube ↗
      Dr. Patrick states that studies have shown supplementing with 5-methyltetrahydrofolate can successfully circumvent some shortcomings of MTHFR gene polymorphisms and lower homocysteine levels.
    • 6 Jan 2015 · uses · YouTube ↗
      Dr. Patrick states that her smoothie, containing spinach, has around 480 micrograms of folate, which is essential for the incorporation of thymine into DNA and is very important in regulating epigenetics.
    • 1 Feb 2014 · recommends · YouTube ↗
      Dr. Patrick states that adequate levels of folate have been shown to prevent cancer, and conversely, inadequate levels can damage DNA, which is known to cause cancer.
    • Date not recorded · neutral · Website ↗
      Dr. Rhonda Patrick discusses folic acid vs. folate.
    • Date not recorded · uses · Website ↗
      Ensured she was getting a ton of folate up to a year before pregnancy to help with baby development.
  • Thomas DeLauer · Folate · recommends
    • 29 Jun 2026 · recommends · YouTube ↗
      Recommends taking methylfolate as a methylated form of B vitamin for mitochondrial function.
    • 10 Jun 2026 · recommends · YouTube ↗
      Recommends methylfolate as a runner-up for insulin resistance, especially for individuals with the MTHFR variant, as it directly enters the methylation cycle without conversion.
    • 25 Feb 2026 · neutral · YouTube ↗
      Mentions folate as a critical B vitamin for reducing homocysteine.
    • 15 Mar 2025 · neutral · YouTube ↗
      Lists folate as a metal donor found in green leafy vegetables, liver, and legumes, especially sprouted legumes.
    • 13 May 2024 · neutral · YouTube ↗
      Mentions methylfolate as the usable form that folic acid is converted into in the human body.
    • 27 Aug 2023 · neutral · YouTube ↗
      Suggests that avocados' high folate content helps break down homocysteine, increasing circulation and energy to the brain, which reduces neuroinflammation and positively impacts mood.
    • 18 Mar 2023 · neutral · YouTube ↗
      States that macadamia nut oil is higher in Folate (B9), which is associated with metabolism and neurological functions.
    • 7 Jun 2021 · recommends · YouTube ↗
      Recommends supplementing with good amounts of folate (Vitamin B9) for telomere regeneration and stabilization, citing a study where it prevented telomere damage from sleep deprivation.
    • 25 May 2021 · recommends · YouTube ↗
      Mentions that Folate (Vitamin B9), along with Vitamin B12, regulates communication between the gut microbiome and the host, suggesting attention to it for synergistic communication.
    • 16 Mar 2020 · recommends · YouTube ↗
      Recommends natural folates like B9 from vegetables, stating they are critical for metabolic function and proper glucose metabolism.
  • Siim Land · Folate · neutral
    • 17 Jan 2026 · neutral · Instagram ↗
      States that Homocysteine levels can often be improved through adequate folate intake.
    • 23 Aug 2025 · warns · YouTube ↗
      Notes that Brian's folate levels are over 20, which is too high and above the reference range, possibly due to supplementation.
    • 15 Feb 2025 · warns · YouTube ↗
      Warns that many people are overdosing on methyl folate, which can contribute to overstimulation when combined with creatine.
    • 4 Nov 2024 · neutral · YouTube ↗
      Notes that folate resulted in negative effects on epigenetic age, meaning it increased epigenetic age.
    • 18 Aug 2024 · uses · YouTube ↗
      Takes methylfolate, and his levels were 'off the charts' and 'maxed out' at 24, in an effort to reduce homocysteine.
    • 6 Mar 2024 · uses · YouTube ↗
      Personally needs more methyl folate.
    • 20 Aug 2023 · recommends · YouTube ↗
      States that glycine synthesis is dependent on carbohydrate and folate, and that converting serine to glycine requires the unmethylated form of folate, thus requiring a high folate intake.
    • 14 Jul 2023 · recommends · YouTube ↗
      Folate is a methyl donor that can be obtained from leafy green vegetables and is important for DNA methylation.
    • 16 Aug 2022 · warns · YouTube ↗
      Warns against excessively pushing methylation forward by simply taking supplemental folate and B12, as it doesn't lead to living forever and can have reasons for concern.
    • 29 Oct 2020 · recommends · YouTube ↗
      Mentions folate as a nutraceutical with anti-thrombotic potential, increasing cyclic GMP.
  • Andrew Huberman · Folate · recommends
    • 31 Mar 2025 · recommends · YouTube ↗
      States that B12, folate, and iron are essential to mitochondrial function and if deficient, mitochondria will not function properly, which is consistent with the mitochondrial theory of neuropsychiatric disorders.
    • 7 Oct 2024 · recommends · YouTube ↗
      Recommends taking methyl folate as part of methylated B vitamins to lower homocysteine levels and reduce cardiovascular risk.
    • 29 Jul 2024 · uses · YouTube ↗
      Takes methyl folate because elevated levels of homocysteine are associated with negative outcomes, and taking methyl folate is known to lower homocysteine. This might lower ADMA and SDMA and raise nitric oxide synthesis, potentially impacting vascular disease.
    • 22 Aug 2022 · neutral · Podcast ↗
      Discusses folate as a potential factor in mitigating cancer risk, particularly in relation to alcohol consumption.
    • 22 Aug 2022 · recommends · YouTube ↗
      Recommends the consumption of folate and other B vitamins, especially B12, as it has been shown to partially decrease cancer risk in people who ingest alcohol, though it does not completely offset it.
    • 9 Aug 2021 · neutral · Podcast ↗
      Discusses L-5-Methyltetrahydrofolate as a novel pain relief compound and mentions it in the context of a protocol for pain.
    • 9 Aug 2021 · neutral · YouTube ↗
      Explains that 5-methyltetrahydrofolate (5-MTHF) is now being used as a strategy to increase endogenous SAMe levels, as it is a precursor molecule necessary for its conversion.
    • Date not recorded · recommends · Website ↗
      Recommends Methylfolate as part of methylated B vitamins to lower homocysteine and reduce cardiovascular risk.
  • Peter Attia · Folate · recommends
    • 19 Aug 2024 · recommends · YouTube ↗
      Highlights folate supplementation as a significant practical progress in nutrition science, which has radically reduced spinabifida.
    • 24 Oct 2023 · uses · YouTube ↗
      Takes Jarrow methylfolate to keep homocysteine levels below nine, taking the lower of two available strengths once a day.
    • 23 Oct 2023 · uses · YouTube ↗
      Takes Jarrow methylfolate, a methylated version, once a day at the lower of two strengths, to keep homocysteine levels below nine.
    • 28 Aug 2023 · neutral · YouTube ↗
      Mentions that in a mouse model for obesity, the amount of folate given to the mother mouse during pregnancy affects the epigenetics of her offspring, leading to changes in coat color and obesity.
    • 5 Jun 2023 · uses · YouTube ↗
      Personally takes methylfolate to help get homocysteine into the desired zone and prefers the Jarrow brand.
    • 18 Jan 2020 · uses · YouTube ↗
      Takes methyl folate as a supplement.
    • 7 Jan 2020 · neutral · YouTube ↗
      Considers 400 micrograms of methylfolate in a typical supplement to be reasonable and more than sufficient, but notes that if it doesn't fix homocysteine, the deficit lies elsewhere.
    • 31 Dec 2019 · uses · YouTube ↗
      Uses and vouches for Jarrow's combined lozenge of methylfolate and methyl B12, stating they choose specific supplements because they know they work and are verified by blood tests.
  • Bryan Johnson · Folate · recommends
    • Date not recorded · recommends · Source ↗
      Recommends supplementing with folate for brain health for both the mother and the baby during pregnancy.

RAL Summary

Members OnlyTier 2 for Mood

Several pooled analyses show folate, including the methylfolate form, improves depressive symptoms when added to meds [1][2][3], and 94% of over 9,000 reviews are positive.

Where the evidence disagrees: 14 of the 50 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Nervous system

Combine with: To enhance the benefits of 5-MTHF, consider combining it with other key nutrients involved in the methylation cycle and overall cellular health. Methylcobalamin (Vitamin B12) is a crucial partner, as it works synergistically with 5-MTHF in the methionine synthase pathway, essential for converting homocysteine to methionine. Pyridoxal-5-Phosphate (P-5-P), the active form of Vitamin B6, and Riboflavin (Vitamin B2) also serve as important cofactors in various methylation-related enzymatic reactions. Magnesium is another vital mineral that acts as a cofactor for numerous enzymes, including those involved in energy production and neurotransmitter synthesis. For broader brain and cellular support, supplementing with Omega-3 fatty acids can complement the neurological benefits of 5-MTHF.

Possible side effects: In pooled trials, side effects and dropouts with folate were similar to placebo. No major side effects reported.

Supplement Facts

Folate 1.7 mg DFE
Supplement Facts
Serving Size 1 Capsule(s)
Servings Per Container 60
Amount Per Serving% Daily Value
Folate1.7 mg DFE

Other ingredients: Microcrystalline Cellulose, Hypromellose, Leucine, Silicon Dioxide.

Directions: Suggested use: Take 1 capsule one to three times daily or as recommended by your healthcare practitioner.

Barcode (UPC) 693749129011 · Label source: NIH label database · Report a label change

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Graded November 3, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.