Methylated B vitamins are B vitamins sold in the forms the body already uses: methylfolate instead of folic acid, methylcobalamin instead of cyanocobalamin, and often pyridoxal 5'-phosphate (P5P) for B6 and riboflavin 5'-phosphate for B2. They are marketed as better absorbed and as essential for anyone with an MTHFR gene variant. The research supports a more modest story, so we ranked these products on what is printed on the label, not on the promise.
We compared eight products in two groups: three full methylated B-complexes and five methylation formulas that add TMG (trimethylglycine, also called betaine). We read every amount below from the Supplement Facts panel on the current Amazon listing. None of these eight appear in our B-complex ranking, which covers seven other popular complexes.
The short version
- Best methylated B-complex: Integrative Therapeutics Active B-Complex, the only complex here with an independent potency certification we could confirm, and a label that lets you take one capsule instead of two.
- Best TMG formula: Designs for Health Homocysteine Supreme, independently tested and the lowest B6 we ranked (10 mg), though its methylfolate runs high.
- Methylated is a preference, not a proven upgrade. Methylfolate raises blood folate at least as well as folic acid, but we found no good-quality evidence that it improves health outcomes more.
- An MTHFR variant is not a reason to avoid folic acid, the CDC says, and US guidance for anyone who could become pregnant names folic acid, the form trials tested.
- TMG dose matters. Trials began to see homocysteine fall at 1.5 grams a day. Only Thorne Methyl-Guard Plus, at its full 3-capsule serving, reaches that; the other four carry 500 mg to 1 gram at their label directions.
- Watch the B6. The US limit is 100 mg a day and Europe set 12 mg in 2023. P5P counts, and B6 adds up across everything you take.
- Before you start: get B12 tested first if you have numbness or fatigue; folate above 1,000 mcg a day is above Europe's limit, which covers methylfolate; mention biotin before blood tests; ask your prescriber first if you take methotrexate, seizure medicines or levodopa without carbidopa; and keep TMG under 4 grams a day.
- Owner request: Igennus Super B-Complex and Thorne Methyl-Guard Plus were on our list before research began because the site's owner asked for them. Neither brand paid, sent product or has any business connection with us, and both were scored like the rest.
How we ranked them
We split the field in two, because a full B-complex and a four-vitamin methylation formula are different products and do not compete on one scale. Each group is ranked separately with the same five criteria, scored at the most the label directs you to take in a day:
- Dose sanity (30%). B6 against the US 100 mg and European 12 mg limits, methylfolate against Europe's 1,000 mcg folate limit, niacin and biotin, and whether the label lets you take less.
- Formulation (25%). Whether it includes riboflavin, how much of each B vitamin is in the active form, and whether the TMG reaches the 1.5 grams a day where trials began to see an effect. Smaller amounts of TMG earn no extra credit.
- Transparency and testing (20%). Whether every form and amount is disclosed, and whether an independent lab certifies the product. A claim of third-party testing, lab verification or certification that names no tester costs points unless we confirmed an independent certification, and so does a listing claim about the active ingredients that the label or the brand's own page contradicts. Two products here carry the TESTED by SuppCo mark, a program launched in 2026 in which an accredited lab checks store-bought samples against the label. We found no USP Verified or NSF Certified for Sport listing for any of the eight.
- Cost per day (15%) at that same daily amount, from Amazon prices on October 15, 2026.
- Marketing restraint (10%). Points come off for gene-targeted claims, detox claims, brand survey or "number one" statistics, child or pregnancy suitability claims and misleading product names. Routine wording about heart, brain or energy support costs nothing, because nearly every brand uses it. We report those claims; we do not repeat them.
Scores are rounded to one decimal, and products with the same rounded score are ordered by the unrounded total. The top three methylation formulas finished within 0.1 points of each other, so choose among them by whichever strength matters most to you. Six of the eight were chosen during research; Igennus Super B-Complex and Thorne Methyl-Guard Plus were on the list from the start because the site's owner asked for them, and they were scored on the same criteria as the rest.
What methylated forms and TMG actually do
Folate. Methylfolate is the form of folate already circulating in your blood, so it needs no conversion. In a single-dose study it raised blood folate more than folic acid in women with and without the common MTHFR variant, and left little or no unmetabolized folic acid behind. Over 12 to 24 weeks it raised red blood cell folate as much as or more than folic acid, while homocysteine, a blood marker the folate cycle recycles, fell by about the same amount in most trials. Whether avoiding unmetabolized folic acid matters for health has not been shown. A 2025 pooled analysis of 11 trials in women of childbearing age reported higher pregnancy rates and fewer adverse pregnancy outcomes with active folate among women with past pregnancy problems, found no significant difference in homocysteine, and its authors called for better-quality trials. Apart from that analysis, whose authors called for better-quality trials, we found no good-quality evidence of a health advantage. One unit note: US labels list folate in DFE (dietary folate equivalents), which can count each microgram of methylfolate as up to 1.7 mcg, so the DFE number is always the larger one. Our methylfolate ranking goes deeper.
B12 and B6. We found no head-to-head trial in people showing methylcobalamin beats cyanocobalamin, or that P5P beats plain pyridoxine. Our B12 ranking covers the B12 forms in more detail.
MTHFR. The CDC says people with common MTHFR variants can process all types of folate, including folic acid, and that folic acid is the only type of folate shown to help prevent neural tube defects. The CDC also notes that more people in the US carry one or two copies of the common C677T variant than do not. The American College of Medical Genetics and Genomics found MTHFR testing has minimal clinical utility and advises against ordering it as part of a routine clotting work-up; it reaffirmed that position in April 2020. In people with two copies of the variant, the nutrient with randomized trial data showing an effect specific to that genotype is riboflavin: in trials from one research group, 1.6 mg a day lowered homocysteine and blood pressure, both measured markers rather than health outcomes. No trial tested the products below. Every one that contains riboflavin carries more than 1.6 mg, so we scored riboflavin on whether a formula includes it, not on the amount. Our folate, folic acid and MTHFR guide explains the genetics.
Homocysteine and health. Lowering homocysteine with B vitamins made no significant difference to heart attacks or deaths in a Cochrane review of 15 trials and 71,422 people. Stroke fell slightly, mostly because of one large Chinese trial in people without folic acid fortification that paired folic acid with a blood pressure drug. The US food supply is fortified, so that result may not carry over.
TMG. TMG hands a methyl group to homocysteine through a separate pathway from folate and B12. In a controlled six-week trial, 1.5, 3 and 6 grams a day lowered fasting homocysteine by 12, 15 and 20 percent. At 1 gram a day or less, fasting homocysteine barely moved, and European food safety regulators estimate a typical diet already supplies about 830 mg a day. In two trials that tested both against placebo, fasting homocysteine fell more with 0.8 mg of folic acid than with 6 grams of betaine, but in one of them betaine blunted the rise after a methionine test dose, with no significant effect from folic acid. At 4 grams a day or more, betaine raised total cholesterol in pooled trials. Our TMG guide has the full picture.
DMG. DMG (dimethylglycine) is what remains after TMG gives up one methyl group. In a small blinded trial in people with chronic kidney disease, 400 mg a day did not change homocysteine, and a four-week trial in 37 children with autism spectrum disorders found it no different from placebo. We found no replicated human trial showing a benefit, which is why no DMG product is ranked here.
The 8 best methylated B vitamins
Tap any product to jump straight to its full review. Each group is ranked on its own.
Methylated B-complexes
Full B-complexes: all eight B vitamins, with the folate as methylfolate and the B12 as methylcobalamin.
Integrative Therapeutics Active B-Complex
Best for: People who want a full methylated complex that an outside lab has checked, and who may take one capsule rather than two
The strongest case among the full complexes, mainly because it is the only one of the three with an independent label check we could confirm (TESTED by SuppCo). The formula covers all eight B vitamins with Quatrefolic methylfolate and methylcobalamin, adds choline and inositol, and the label allows one or two capsules. That flexibility matters: two capsules bring 50 mg of B6 and 100 mg of niacinamide, while one capsule halves both. The B6 mixes P5P with plain pyridoxine in an undisclosed split, so it is not fully active.
- The only B-complex here with an independent potency certification we could confirm (TESTED by SuppCo)
- The label allows 1 or 2 capsules; one capsule halves the B6 to 25 mg
- Full complex with methylcobalamin and Quatrefolic methylfolate, plus choline and inositol
- About 30 cents a capsule, with nearly 7,700 Amazon ratings
- The B6 mixes P5P with plain pyridoxine, and the label does not give the split
- Two capsules carry 50 mg of B6, the reference point Europe used before setting its 12 mg limit
- 100 mg of niacinamide is above the 35 mg US niacin limit, which covers niacinamide
- 300 mcg of biotin: mention it before any blood test
- No TMG
Igennus Super B-Complex
Best for: People who want a full complex with moderate amounts, as two small tablets taken morning and evening
The site's owner asked us to include this one; Igennus did not pay, send product or have any business connection with us, and it was scored like the rest. It earns its place on doses: about 400 mcg of methylfolate and 20 mg of B6, the lowest B6 of the three complexes, every form disclosed, at 47 cents a day. It lost first place narrowly, on testing and marketing: no independent certification, a listing "Lab Verified" claim that names no lab, marketing aimed at MTHFR carriers, and improvement figures from a 75-person survey of self-reported outcomes that describes no control group. The US formula carries twice the B6 of the UK version, and its niacinamide sits above the US niacin limit.
- All eight B vitamins in disclosed forms, including methylfolate, methylcobalamin and P5P
- The lowest B6 of the three complexes, 20 mg, plus about 400 mcg of methylfolate
- Includes riboflavin 5'-phosphate
- Two small sustained-release tablets you can take one in the morning and one in the evening
- 47 cents a day, with more than 28,000 Amazon ratings
- No independent product certification listed; the listing's "Lab Verified" names no lab
- 20 mg of B6 is above Europe's 12 mg limit (the UK version of this formula has 10 mg)
- 48 mg of niacinamide is above the 35 mg US niacin limit, which covers niacinamide
- 300 mcg of biotin: mention it before any blood test
- The listing's improvement figures come from a 75-person, 8-week study of self-reported outcomes; the listing describes no control group
Doctor's Best Fully Active B Complex
Best for: Price-first buyers who are fine with a single fixed 50 mg dose of B6
The cheapest way into a methylated complex here, with Quatrefolic methylfolate and 1,000 mcg of methylcobalamin in one capsule. The name promises more than the label delivers: riboflavin, niacin and B6 are each a mix of active and standard forms, the splits are not given, and part of the niacin is nicotinic acid, which can cause flushing. Fifty milligrams of B6 in a single capsule leaves no easy way to take less, and the 600 mcg of biotin is the most of any product here.
- The cheapest full complex here, about 30 cents a day
- Quatrefolic methylfolate and 1,000 mcg of methylcobalamin in one capsule
- Nearly 4,000 Amazon ratings
- The name overstates it: riboflavin, niacin and B6 each mix active and standard forms, splits not given
- 50 mg of B6 in a single capsule, so there is no easy way to take less
- 50 mg of niacin is above the 35 mg US limit; part is nicotinic acid (amount not stated), which can flush
- 600 mcg of biotin: mention it before any blood test
- No TMG, and no independent product certification listed
Methylation formulas with TMG
Narrower formulas built around the four B vitamins in the folate and B12 cycle (B2, B6, folate and B12), plus TMG. They skip thiamin, niacin, pantothenic acid and biotin.
Designs for Health Homocysteine Supreme
Best for: People who want a tested methylation formula with low B6 and do not mind the higher folate
The best-balanced methylation formula once testing counts. It is the only TMG formula here with an independent potency certification we could confirm (TESTED by SuppCo), and its 10 mg of B6 is the lowest we ranked and the only amount under Europe's 12 mg limit. It adds riboflavin 5'-phosphate, 1,000 mcg of methylcobalamin, 900 mg of TMG and serine. The trade-off is folate: about 2,000 mcg of methylfolate per two-capsule serving, twice Europe's limit. One capsule halves everything, which brings the folate down to about that limit.
- The only TMG formula here with an independent potency certification we could confirm (TESTED by SuppCo)
- The lowest B6 we ranked, 10 mg, and the only product under Europe's 12 mg limit
- Riboflavin 5'-phosphate, 1,000 mcg methylcobalamin and 900 mg of TMG
- One capsule halves every amount if you want less
- About 2,000 mcg of methylfolate per 2 capsules, twice Europe's limit (the label lists DFE only)
- 900 mg of TMG is below the 1.5 grams a day where trials began to see an effect
- 96 cents a day, more on the 60-capsule bottle
- Its listing leans on "#1 practitioner brand" survey claims and detox framing; we repeat neither
Allergy Research Group Homocysteine Plus
Best for: Budget buyers who want a one-capsule methylation formula
The budget TMG formula: one capsule a day for about 30 cents, with 400 mcg of methylfolate, riboflavin 5'-phosphate, 400 mcg of methylcobalamin and 500 mg of TMG, and a label honest enough to state that half its 30 mg of B6 is plain pyridoxine. The 50 mg of glutathione and 5 mg of zinc earn no extra credit from us. It finished just behind Designs for Health, which carries an independent certification and whose B6 is fully active, while ARG's listing calls its half-pyridoxine B6 coenzyme form; ARG's lower price narrows the gap.
- The cheapest TMG formula here, about 30 cents a day
- A moderate 400 mcg of methylfolate, plus riboflavin 5'-phosphate
- One capsule, and the label discloses even the B6 split
- A 90-day bottle
- Half the B6 is plain pyridoxine, though the listing calls it coenzyme form; 30 mg is above Europe's limit
- 500 mg of TMG is well below the 1.5 grams a day where trials began to see an effect
- We give no credit for the 50 mg of glutathione
- Only about 40 Amazon ratings, and no independent product certification listed
Seeking Health Homocysteine Nutrients
Best for: People who want one balanced capsule with riboflavin, methylfolate, B12 and some TMG
The tidiest single-capsule methylation formula: riboflavin 5'-phosphate, P5P, 800 mcg of Quatrefolic methylfolate, two forms of B12 and 700 mg of TMG, every amount on the label, for 62 cents a day, with the most TMG per capsule of any formula here. It placed third, just behind ARG: its MTHFR-targeted marketing, its age-4 and pregnancy suitability claims and an unnamed testing claim cost it points, it lacks the independent certification Designs for Health has, and it costs about twice as much a day as ARG. The 700 mg of TMG is below the 1.5 grams where trials began to see an effect, so treat it as a minor ingredient. Its gallery images present it as suitable in pregnancy and from age 4; see our notes on both below.
- Riboflavin 5'-phosphate, P5P, methylfolate, two forms of B12 and TMG in one capsule
- Every amount disclosed; 800 mcg of methylfolate stays under Europe's 1,000 mcg limit
- Moderate B6 at 15 mg
- 62 cents a day for a two-month bottle
- 700 mg of TMG is below the 1.5 grams a day where trials began to see an effect
- 15 mg of B6 is above Europe's 12 mg limit
- No independent certification; its images claim third-party contaminant testing but name no tester
- Marketed to people with MTHFR variants; the CDC says common variants can still use folic acid
- Its images mark it suitable from age 4 and in pregnancy; see our children and pregnancy notes below
Pure Encapsulations Homocysteine Factors
Best for: People who want the fewest ingredients and do not need riboflavin
Four actives and almost nothing else: P5P, Metafolin methylfolate, methylcobalamin and TMG. That simplicity is the appeal. The drawbacks are the missing riboflavin and the label's two-capsule day, which totals 50 mg of B6 and 800 mcg of methylfolate for 97 cents. Taking one capsule is a moderate option, but you are then below the label's directions and well below the TMG range trials used.
- Four actives and almost nothing else in the capsule
- Metafolin methylfolate, with the exact amount on the label
- All forms are the active ones: P5P, methylfolate, methylcobalamin
- No riboflavin (B2)
- The Amazon listing says its TMG aids nutrient absorption; the brand's own page says it is there for methylation
- The label's 2-capsule day is 50 mg of B6 and 800 mcg of methylfolate
- Even at 2 capsules, 1 gram of TMG is below the 1.5 grams where trials saw an effect
- 97 cents a day at the label's dose, and no independent product certification listed
Thorne Methyl-Guard Plus
Best for: People working with a clinician who wants TMG at the dose trials used
The site's owner asked us to include this one; Thorne did not pay, send product or have any business connection with us, and it was scored like the rest. It is the only combination product here with TMG in the range trials tested: 1.8 grams in three capsules. That full serving also carries 3,000 mcg of methylfolate and 45 mg of B6, three to four times Europe's limits, at $2.07 a day. That is a dose to choose with a clinician who has measured your homocysteine. Its $2.07 daily cost is the largest reason it scored last in its group; the high full-serving doses, its MTHFR and liver-detox marketing, and a certification claim that names no certifier also cost it points. One capsule is a moderate option but drops the TMG to 600 mg.
- 1.8 grams of TMG in 3 capsules, the only formula here in the range where trials lowered homocysteine
- A clean five-ingredient formula, with the exact methylfolate amount on the label
- The label allows 1 to 3 capsules, so you can scale the dose
- Includes riboflavin 5'-phosphate
- The full serving is 3,000 mcg of methylfolate and 45 mg of B6, three to four times Europe's limits
- At one capsule, the TMG drops to 600 mg, below the trial range
- $2.07 a day at the full serving, the most expensive product here
- Not a full B-complex: no B1, B3, B5 or biotin
- Thorne says it is third-party tested and certified but names no certifier, and we found no USP or NSF listing for it
- Thorne's own label carries a methotrexate warning; ask your prescriber first if you take it
- Marketed to people with MTHFR variants, with detox claims and "#1 recommended" survey claims
If you already take a B-complex and want TMG at the dose trials used, plain TMG costs less than stacking a second high-folate formula. These two are information picks with no award.
The full lineup, side by side
Amounts are per label serving (Pure Encapsulations at its 2-capsule daily direction). Methylfolate is shown in micrograms of the compound, with the label's DFE (dietary folate equivalents) figure in brackets; labels may count each microgram of methylfolate as up to 1.7 mcg DFE. A tilde means we worked the compound amount out from the DFE figure because the label does not state it.
| Product | Methylfolate (DFE) | B12 | B6 | Riboflavin (B2) | TMG | Independent testing | Cost per day |
|---|---|---|---|---|---|---|---|
| #1 Integrative Active B | ~470 mcg (800 DFE) | 1,000 mcg methyl | 50 mg mixed (25 per cap) | 50 mg | None | TESTED by SuppCo | $0.61 |
| #2 Igennus Super B | ~400 mcg (667 DFE) | 900 mcg methyl | 20 mg P5P | 14 mg | None | None listed | $0.47 |
| #3 Doctor's Best Active B | ~235 mcg (400 DFE) | 1,000 mcg methyl | 50 mg mixed | 75 mg mixed | None | None listed | $0.30 |
| #4 DFH Homocysteine Supreme | ~2,000 mcg (3,400 DFE) | 1,000 mcg methyl | 10 mg P5P | 30 mg | 900 mg | TESTED by SuppCo | $0.96 |
| #5 ARG Homocysteine Plus | 400 mcg (667 DFE) | 400 mcg methyl | 30 mg mixed | 10 mg | 500 mg | None listed | $0.30 |
| #6 Seeking Health | 800 mcg (1,360 DFE) | 1,000 mcg methyl + adenosyl | 15 mg P5P | 25 mg | 700 mg | None listed | $0.62 |
| #7 Pure Homocysteine Factors | 800 mcg (1,334 DFE) | 400 mcg methyl | 50 mg P5P | None | 1 g | None listed | $0.97 |
| #8 Thorne Methyl-Guard Plus | 3,000 mcg (5,000 DFE) | 3,000 mcg methyl | 45 mg P5P (15 per cap) | 90 mg | 1.8 g | Brand claim, no named certifier | $2.07 |
Prices are Amazon prices on October 15, 2026 and change often. Independent testing lists only certifications we could confirm on the certifier's own listing; brand claims of in-house or unnamed third-party testing are noted on each card. B6 above 12 mg and folate above 1,000 mcg a day exceed European limits; see the safety checks below.
How to choose, and what to check first
If you want an everyday B-complex, start in the first group. Integrative Active B at one capsule is the moderate option with an independent certification; Igennus is the moderate option without one. Neither needs TMG.
If a clinician has measured your homocysteine, bring the evidence above to that conversation: in trials, folate lowered homocysteine more than TMG did, and TMG had a measurable effect only at 1.5 grams a day or more. Let the clinician decide whether any product here fits.
If you have a reason to watch B12, such as long-term metformin or acid-suppressing medicine, a vegan diet, older age or weight-loss surgery, the dose matters more than the form. In a four-year trial, metformin lowered B12 levels by 19 percent, and two or more years of acid-suppressing drugs were linked to B12 deficiency in a large case-control study. Ask for a B12 test before you start, because high folate can blur the results.
If you are pregnant or trying to conceive, US guidance is 400 to 800 mcg of folic acid a day, including for people with an MTHFR variant. None of these products is a prenatal substitute.
- B6 adds up. The US upper limit is 100 mg a day; Europe set 12 mg in 2023 after reviewing nerve-damage reports. P5P counts. Total the B6 in every product you take, and stop and see a clinician if your hands or feet tingle, burn or go numb.
- Folate above 1,000 mcg. The US limit was written for folic acid. Europe applies the same 1,000 mcg limit to folic acid and methylfolate combined. Two products here, Designs for Health Homocysteine Supreme and Thorne Methyl-Guard Plus, exceed it at their full serving.
- Test B12 first if you have symptoms. Numbness, fatigue or anemia call for a B12 test before you start, because high folate can blur the picture.
- Biotin and blood tests. The FDA warns that biotin can distort some lab results and says there is no proven safe time to stop before testing. Three products here contain 300 to 600 mcg. Tell whoever orders your blood work.
- Medicines. Ask your prescriber first if you take methotrexate, seizure medicines such as phenytoin, carbamazepine or valproate, or levodopa without carbidopa.
- TMG. Four grams a day or more raised cholesterol in pooled trials. People with a rare genetic disorder called homocystinuria use prescription betaine under medical care and should not self-dose.
- Children. These are adult-strength products. Seeking Health's images mark its formula suitable from age 4, but one capsule has 800 mcg of methylfolate and 15 mg of B6, while Europe's limits for children up to age 6, which cover methylfolate, are at most 300 mcg of folate and 4.5 mg of B6 a day. Ask a pediatrician before giving any of these to a child.
Frequently asked questions
What are methylated B vitamins?
They are B vitamins sold in the forms your body already uses: methylfolate (5-MTHF) instead of folic acid, methylcobalamin instead of cyanocobalamin, and often P5P for B6 and riboflavin 5'-phosphate for B2. Folate and B12 work together in the methylation cycle, which the body uses to make many compounds and to recycle homocysteine. Methylated describes the form, not a stronger effect.
Are methylated B vitamins better than regular B vitamins?
Not in any way good-quality trials have shown. Methylfolate raises blood folate at least as well as folic acid, sometimes more, and leaves less unmetabolized folic acid in the blood, but studies comparing the two found similar drops in homocysteine. A 2025 pooled analysis reported better pregnancy outcomes with active folate in women with past pregnancy problems, but its authors called for better-quality trials. We found no head-to-head trial showing methylcobalamin beats cyanocobalamin. Treat methylated forms as a reasonable preference, not a required upgrade.
Do I need methylated B vitamins if I have an MTHFR variant?
Usually not. The CDC says people with common MTHFR variants can process all types of folate, including folic acid, and that the variant is not a reason to avoid it. The American College of Medical Genetics and Genomics advises against ordering MTHFR tests as part of a routine clotting work-up. If you want a number to discuss with your clinician, a homocysteine blood test tells you more than the gene test.
What is TMG, and should I take it with a methylated B-complex?
TMG (trimethylglycine, or betaine) donates a methyl group through a separate pathway from folate and B12. In controlled trials, 1.5 grams a day or more lowered blood homocysteine, a lab marker. Doses of 1 gram or less had little measurable effect, and most combination formulas contain 500 to 900 mg. At 4 grams a day or more, betaine raised total cholesterol in pooled trials, so more is not better.
What is the difference between TMG and DMG?
DMG (dimethylglycine) is what remains after TMG gives up one methyl group. In a small trial in people with kidney disease, 400 mg a day of DMG did not change homocysteine, and controlled trials in other areas were negative or never repeated. We do not consider DMG a methylation supplement, and it is not a vitamin; products sold as vitamin B15 are a different, unapproved category.
Can methylated B vitamins cause side effects like anxiety or overmethylation?
Some people report feeling jittery or sleeping poorly, but in placebo-controlled trials of prescription methylfolate at 7,500 to 15,000 mcg a day, side effects were no more common than with placebo. Overmethylation is not a recognized diagnosis. Bright yellow urine from riboflavin is expected and harmless. If your B-complex contains biotin, tell your clinician before blood tests, because it can distort some results. If you have numbness, fatigue or anemia, get B12 tested before you start.
How much vitamin B6 is too much?
The US upper limit for adults is 100 mg a day, and Europe set 12 mg a day in 2023 after reviewing reports of nerve damage. The active P5P form counts toward both limits. Add up the B6 from every product you take, and stop and see a clinician if you notice tingling, burning or numbness in your hands or feet.
Can I take methylated B vitamins if I am pregnant or trying to conceive?
Talk to your prenatal provider first. US guidance from the US Preventive Services Task Force and the CDC is 400 to 800 mcg of folic acid a day for anyone who could become pregnant, including people with an MTHFR variant, and folic acid is the form trials tested. Several formulas here also exceed the B6 and folate in a typical prenatal, so they are not a substitute for one.
The bottom line
Methylated B vitamins are a reasonable preference, not a proven upgrade, and an MTHFR variant does not make them a requirement. Among full complexes, Integrative Therapeutics Active B-Complex leads because an independent lab has checked it and you can take one capsule; Igennus Super B-Complex, which the site's owner asked us to include, is the moderate-dose alternative without that testing. Among methylation formulas, Designs for Health Homocysteine Supreme combines independent testing with the lowest B6 here, though its two-capsule serving carries about 2,000 mcg of methylfolate, twice Europe's limit. Thorne Methyl-Guard Plus, the owner's other request, is the only formula with TMG at the dose trials used, but its full serving is a high-dose product to use with a clinician. Whatever you choose, add up your B6, keep folate in check, and follow the folic acid guidance if you could become pregnant.