It signals with a chemical. The vagus nerve talks to your heart and gut by releasing acetylcholine, a discovery that won a Nobel Prize.
That chemical is made from food. Choline makes one half. Thiamine, B2, B5 and magnesium are needed to make the other.
It’s spent every time. Acetylcholine is broken down within milliseconds, and the acetyl half has to be rebuilt for every signal.
Food first, then fill the gaps. Eggs, oily fish, wholegrains, pulses and greens cover most of it. Supplements are for the gaps.
Why does the vagus nerve need vitamins at all?
Because it works chemically. When the vagus nerve fires, its endings release acetylcholine, the messenger that slows your heart and keeps digestion moving. Your body builds acetylcholine from choline and acetyl-CoA, and making acetyl-CoA needs thiamine, riboflavin, pantothenic acid and magnesium. Without those raw materials, the signal has less to work with.
In 1921, the pharmacologist Otto Loewi ran an experiment that, by his own account, came to him in a dream. He stimulated the vagus nerve of a beating frog’s heart, and the heart slowed. Then he took the fluid bathing that heart and dripped it onto a second heart whose nerve he hadn’t touched. The second heart slowed too.1
The nerve hadn’t sent electricity across. It had released a chemical, which Loewi called Vagusstoff: “vagus substance”. We now know it as acetylcholine, and the work earned him a share of the 1936 Nobel Prize.
Here’s what the wellness world skipped. Acetylcholine is broken down within milliseconds of being released. Some of the choline is recycled, but the acetyl half has to be made fresh from food energy, by an enzyme that can’t work without four B vitamins and magnesium.2 Every signal spends it. Every signal needs it rebuilt.
Stimulation asks the nerve to signal. Nutrition is what the signal is made of.
The body holds only a small reserve of thiamine, so it needs topping up every day, and when it runs short, nerves are among the first things affected. Severe deficiency, beriberi, damages the autonomic nerves that serve the heart and gut.2
Which vitamins does the vagus nerve need?
Five nutrients sit directly in the acetylcholine pathway: thiamine (B1), riboflavin (B2), pantothenic acid (B5), magnesium and choline. Omega-3 DHA doesn’t make acetylcholine but has the strongest trial evidence, lowering resting heart rate. Vitamin B12 supports nerve health generally, and niacin (B3) is a further cofactor for the same enzyme.
| Nutrient | Its job | Daily need | Best foods | Science | Trials |
|---|---|---|---|---|---|
| Thiamine (B1) | Key cofactor for making acetyl-CoA | 1.1 mg | Wholegrains, pork, peas, beans, seeds | Strong | Early |
| Choline | The other half of acetylcholine | 400 mg (EFSA) | Eggs, fish, meat, soya, beans | Strong | Early |
| Pantothenic acid (B5) | Becomes coenzyme A, the “CoA” in acetyl-CoA | 6 mg | Meat, eggs, mushrooms, avocado | Strong | Early |
| Riboflavin (B2) | Cofactor for the same enzyme | 1.4 mg | Milk, yoghurt, eggs, mushrooms | Strong | Early |
| Magnesium | Turns thiamine into its active form | 375 mg | Leafy greens, nuts, seeds, beans | Good | Early |
| Omega-3 DHA | Built into heart and nerve cells; lowers resting heart rate | 250 mg EPA+DHA (EFSA) | Oily fish; algae oil | Good | Moderate |
| Vitamin B12 | Keeps nerves and their insulating sheath healthy | 2.5 µg | Meat, fish, eggs, dairy, fortified foods | Good | Early |
| Niacin (B3) | The fourth B vitamin the same enzyme needs | 16 mg | Meat, fish, wholegrains | Strong | Early |
Daily needs are UK nutrient reference values (NRVs) for adults. Choline and omega-3 have no NRV, so the EFSA reference intake is shown. Highlighted rows are the five nutrients in the acetylcholine pathway.
Why is “Trials” mostly early? Because nobody runs trials that take thiamine away from people and measure their vagal tone. The biology is textbook; the direct trials are still to come. Omega-3 is the exception, and it’s why nutrition as a whole scores Science Strong / Trials Moderate in our comparison of 11 vagus nerve methods.
How does each nutrient support the vagus nerve?
Thiamine, riboflavin, pantothenic acid and magnesium let the body make acetyl-CoA, and choline supplies the other half of acetylcholine, so together they build the vagus nerve’s messenger. Omega-3 DHA works differently, through heart and nerve cell membranes, and B12 protects nerves themselves. Here is what each does, where to find it, and how much.
Does thiamine help the vagus nerve?
Yes. Thiamine is the nutrient the acetylcholine pathway leans on most.
In its active form it’s the cofactor pyruvate dehydrogenase needs to make acetyl-CoA. The body keeps only small stores, so it needs a steady daily supply, and alcohol increases how much you use.2 Beriberi, severe thiamine deficiency, swept through populations that switched to polished white rice in the 1800s, because polishing strips away the thiamine-rich bran. Benfotiamine, a fat-soluble form, delivered about 11 times more thiamine to the blood than standard thiamine in a human study.3
Is choline good for the vagus nerve?
Yes. Choline is literally half of acetylcholine, the vagus nerve’s messenger.
The body makes some choline, but not enough, so most has to come from food. A 2019 UK review warned that intakes may be falling short, partly because people are eating fewer eggs and less meat.4 Two eggs provide roughly 300 mg, which makes them the easiest way to get close to the 400 mg reference intake. Citicoline is a well-absorbed supplement form that supplies choline plus cytidine.
Does magnesium help the vagus nerve?
Indirectly but importantly: magnesium turns thiamine into the active form the pathway uses.
Without enough magnesium, thiamine can’t work properly. Magnesium is also involved in hundreds of other enzyme reactions, including those behind nerve signalling and heart rhythm. Long-term use of proton pump inhibitors, common heartburn medicines, can lower magnesium levels.5 The NHS says 400 mg or less a day from supplements is unlikely to cause harm.6
What do riboflavin and pantothenic acid do?
Both are needed to make acetyl-CoA, the half of acetylcholine that’s rebuilt for every signal.
Pantothenic acid becomes coenzyme A, the “CoA” in acetyl-CoA. It’s in so many foods (the name comes from the Greek for “from everywhere”) that deficiency is rare. Riboflavin forms FAD, another cofactor the same enzyme needs. Riboflavin-5-phosphate is the form the body actually uses, so it doesn’t need converting first.
Is omega-3 good for vagal tone?
It has the best trial evidence of any nutrient here, through heart rate rather than acetylcholine.
A meta-analysis of 51 randomised trials, with around 3,000 people, found omega-3 supplements lowered resting heart rate by about two beats a minute, and the effect came from DHA rather than EPA.7 Two of its authors worked for an omega-3 manufacturer. In another trial, high-dose EPA and DHA raised resting heart rate variability.8 Resting heart rate is set largely by the vagal brake, so these findings fit a vagal effect without proving one.9
Does vitamin B12 help the vagus nerve?
Indirectly. B12 doesn’t make acetylcholine, but every nerve needs it to stay healthy.
B12 keeps nerves and their insulating myelin sheath in good repair, and a lasting shortage can damage them, often first felt as pins and needles in the hands or feet. Absorption falls with age, vegans need a reliable source, and long-term use of metformin, a common diabetes medicine, can lower B12 levels.10
What about vitamin D, zinc and probiotics?
They often appear on vagus nerve lists, but they belong in a different category. Vitamin D and zinc matter for general health and are worth getting right, but neither is part of how acetylcholine is made, and evidence on vagal measures is thin. Probiotics are more interesting: effects depend on the strain, and human trials are early.
Vitamin D
Not in the pathwayImportant for bones, muscles and immunity, and from October to March UK sunlight isn’t strong enough for your skin to make it. The NHS advises everyone to consider 10 micrograms a day in autumn and winter.11 Worth taking for that reason. Just not a vagus nerve nutrient.
Zinc
Not in the pathwayNeeded for immunity, skin and hundreds of enzymes, and usually covered by meat, shellfish, dairy, seeds and wholegrains. There’s no good reason to take extra zinc for your vagus nerve.
Probiotics
Early, but realIn a well-known mouse study, a Lactobacillus strain changed stress-related behaviour, and the effect disappeared when the vagus nerve was cut.12 A small 2025 human trial reported improved vagal measures after a multi-species probiotic.13 Results are strain-specific, so one study doesn’t cover every product. More in the vagus nerve and digestion.
What foods are good for the vagus nerve?
The best foods for the vagus nerve are the ones that supply its messenger’s nutrients: eggs for choline, B2 and B5; wholegrains, pork, peas and beans for thiamine; nuts, seeds and leafy greens for magnesium; milk and yoghurt for riboflavin; and oily fish twice a week for omega-3 DHA and B12.
Eggs
The best all-rounder on this page.
- Choline
- B2
- B5
- B12
Oily fish
Salmon, mackerel, sardines. Twice a week.
- DHA
- B12
- B3
Wholegrains
Wholemeal bread, oats, brown rice, fortified cereal.
- B1
- B3
- Mg
Peas, beans & lentils
Plus soya, for plant-based choline.
- B1
- Mg
- Choline
Nuts & seeds
Pumpkin and sunflower seeds, almonds.
- Mg
- B1
Leafy greens
Spinach, kale, chard.
- Mg
Milk & yoghurt
Or fortified plant alternatives.
- B2
- B12
- B5
Pork & mushrooms
Pork is one of the richest thiamine sources.
- B1
- B2
- B5
A day that covers the core
- BreakfastTwo eggs on wholegrain toastCholine, B2, B5 and B12 from the eggs; thiamine from the bread.
- LunchLentil and spinach salad, pumpkin seedsThiamine and magnesium, with plenty of fibre.
- DinnerMackerel or salmon, brown rice, greensOmega-3 DHA and B12, plus more magnesium.
- Any timeA pot of yoghurtRiboflavin and B12. Have it with a meal rather than as a snack, so your gut gets real gaps between meals.
Plant-based? Soya, beans and lentils cover much of it, but choline is harder to reach without eggs, DHA needs algae oil, and B12 needs a fortified food or supplement.
Who is most likely to run low?
People most likely to run low are regular drinkers (thiamine), people who eat few eggs, little meat or fish, or a vegan diet (choline, B12, DHA), older adults (B12), long-term users of heartburn medicines called proton pump inhibitors (magnesium), and people on long-term metformin (B12). Weight-loss surgery and very restrictive diets raise the risk too.
- Regular or heavy drinkersThiamine
- Few eggs, little meat or fish, or veganCholine · B12 · DHA
- Older adultsB12
- Long-term proton pump inhibitorsMagnesium
- Long-term metforminB12
- After weight-loss surgery, or on a very restrictive dietThiamine
If you think you might be low in something, ask your GP whether a blood test makes sense rather than guessing, and never stop or change a prescribed medicine on your own.
Do you need a supplement for your vagus nerve?
Not everyone does. If you eat eggs, oily fish, wholegrains, pulses and greens most days, food can cover the core. A supplement makes sense when your diet leaves gaps, when drinking or medicines raise your needs, or when you want both halves of acetylcholine covered at a consistent daily dose.
What to look for
- Both halves of acetylcholineA choline source, plus thiamine, riboflavin, pantothenic acid and magnesium for the acetyl-CoA half. Covering one half and not the other misses the point.
- Forms your body can useBenfotiamine alongside thiamine,3 riboflavin-5-phosphate, citicoline, and a chelated magnesium such as bisglycinate.
- Honest wordingNo supplement stimulates or resets the vagus nerve. Nutrients supply it; habits like slow breathing and exercise use it. Be wary of a label that promises otherwise.
- Food still does the restNo formula covers everything. Keep oily fish for DHA, and eggs, dairy or a fortified food for B12.
Beyond the basics
Formulas built around the acetylcholine pathway often add compounds that aren’t vitamins. Here’s what each one is.
| Compound | What it is | In Vagus One |
|---|---|---|
| Acetyl-L-carnitine | The acetylated form of carnitine. It carries acetyl groups, the same building block acetyl-CoA supplies. | 300 mg |
| L-theanine | An amino acid from tea leaves, studied for calm, focused alertness. | 150 mg |
| Saffron extract | A standardised extract of the saffron crocus, studied for mood. | 30 mg |
Everyone’s stimulating their vagus nerve. Almost nobody’s feeding it.
That’s why we made Vagus One. One daily formula built around the pathway on this page, with both halves of acetylcholine at printed doses. It doesn’t replace your breathing, your cold water or your walks. It supplies what they ask for.
- Citicoline250 mg
- Benfotiamine200 mg
- Thiamine25 mg
- Pantothenic acid100 mg
- Riboflavin-5-phosphate10 mg
- Magnesium (bisglycinate)60 mg
- Acetyl-L-carnitine300 mg
- L-theanine150 mg
- Saffron extract30 mg
★ 4.6 from 1,000+ reviews · 90-day promise · from £1.10 a day
Two capsules a day with a meal. Vegan, no fillers or binders. Vagus One doesn’t stimulate the vagus nerve; it supplies what the nerve spends. It has no omega-3 or B12, so pair it with oily fish twice a week. Food supplements are not a substitute for a varied, balanced diet.
Are vitamins for the vagus nerve safe to take?
At normal doses, the nutrients on this page are safe for most adults. Keep to NHS guidance: no more than 10 mg of vitamin B6 a day from supplements unless a doctor advises it, and 400 mg or less of supplemental magnesium. Check with a GP or pharmacist first if you’re pregnant, on medication or managing a condition.
- Pins and needles or numbness in your hands or feet that doesn’t go away
- Fainting, near-fainting or dizziness when you stand up
- A racing, very slow or irregular heartbeat, chest pain or breathlessness
- Persistent vomiting, early fullness or unexplained weight loss
- Anxiety or low mood that is affecting your daily life
These need proper assessment, not a change of diet. The nutrients on this page support normal nerve function; they are not a treatment for any condition, and you shouldn’t stop a prescribed medicine because you’ve started a supplement.
Vitamins for the vagus nerve FAQs
What vitamins are good for the vagus nerve?
The vitamins that matter most are thiamine (B1), riboflavin (B2) and pantothenic acid (B5), which the body needs to make acetyl-CoA, half of the vagus nerve’s messenger acetylcholine. Choline supplies the other half, and magnesium activates thiamine. Omega-3 DHA and vitamin B12 support the heart and nerves more broadly.
Does magnesium help the vagus nerve?
Magnesium helps indirectly. It converts thiamine into its active form, which the body needs to make acetylcholine, the vagus nerve’s messenger, and it is involved in nerve signalling and heart rhythm. Leafy greens, nuts, seeds and beans are good sources. The NHS says 400 mg or less a day from supplements is unlikely to cause harm.
Is vitamin B12 good for the vagus nerve?
Vitamin B12 isn’t used to make acetylcholine, but all nerves, including the vagus nerve, need it to stay healthy, and a lasting shortage can damage them. Older adults, vegans and people on long-term metformin are most likely to run low. Meat, fish, eggs, dairy and fortified foods supply it.
Does omega-3 improve vagal tone?
Omega-3 has the strongest trial evidence of any nutrient. A meta-analysis of 51 randomised trials found supplements lowered resting heart rate by about two beats a minute, driven by DHA, and resting heart rate is set largely by vagal activity. That fits a vagal effect without proving one. Oily fish twice a week covers it.
What foods are good for the vagus nerve?
Eggs are the standout, supplying choline, riboflavin, pantothenic acid and B12. Add wholegrains, pork, peas and beans for thiamine; nuts, seeds and leafy greens for magnesium; milk or yoghurt for riboflavin; and oily fish twice a week for omega-3 DHA. Together they cover the nutrients the vagus nerve builds its messenger from.
Can vitamins stimulate the vagus nerve?
No. Vitamins don’t stimulate the vagus nerve; they supply what it signals with. The nerve releases acetylcholine every time it fires, and your body rebuilds it from choline plus acetyl-CoA, which needs thiamine, riboflavin, pantothenic acid and magnesium. Stimulation methods ask the nerve to fire. Nutrition provides what it fires with.
What is the best supplement for the vagus nerve?
Choose one that covers both halves of acetylcholine at printed doses: a choline source such as citicoline, plus thiamine (ideally with benfotiamine), riboflavin, pantothenic acid and magnesium. Yona’s Vagus One is formulated around exactly this pathway. Pair any supplement with oily fish for omega-3 DHA, and check B12 if you eat few animal foods.
References
- Loewi O. Über humorale Übertragbarkeit der Herznervenwirkung. Pflügers Arch. 1921;189:239–242. doi:10.1007/BF01738910
- Overton E, Emelyanova A, Bunik VI. Thiamine, gastrointestinal beriberi and acetylcholine signaling. Front Nutr. 2025;12:1541054. PMC12014454
- Xie F, Cheng Z, Li S, et al. Pharmacokinetic study of benfotiamine and the bioavailability assessment compared to thiamine hydrochloride. J Clin Pharmacol. 2014;54(6):688–695. doi:10.1002/jcph.261
- Derbyshire E. Could we be overlooking a potential choline crisis in the United Kingdom? BMJ Nutr Prev Health. 2019;2(2):86–89. doi:10.1136/bmjnph-2019-000037
- Medicines and Healthcare products Regulatory Agency. Proton pump inhibitors in long-term use: reports of hypomagnesaemia. Drug Safety Update. gov.uk
- NHS. Vitamins and minerals: others (magnesium). nhs.uk
- Hidayat K, Yang J, Zhang Z, et al. Effect of omega-3 long-chain polyunsaturated fatty acid supplementation on heart rate: a meta-analysis of randomized controlled trials. Eur J Clin Nutr. 2018;72(6):805–817. doi:10.1038/s41430-017-0052-3
- Sauder KA, Skulas-Ray AC, Campbell TS, Johnson JA, Kris-Etherton PM, West SG. Effects of omega-3 fatty acid supplementation on heart rate variability at rest and during acute stress in adults with moderate hypertriglyceridemia. Psychosom Med. 2013;75(4):382–389. doi:10.1097/PSY.0b013e318290a107
- Laborde S, Mosley E, Thayer JF. Heart rate variability and cardiac vagal tone in psychophysiological research. Front Psychol. 2017;8:213. doi:10.3389/fpsyg.2017.00213
- Medicines and Healthcare products Regulatory Agency. Metformin and reduced vitamin B12 levels: new advice for monitoring patients at risk. Drug Safety Update. 2022. gov.uk
- NHS. Vitamin D. nhs.uk
- Bravo JA, Forsythe P, Chew MV, et al. Ingestion of Lactobacillus strain regulates emotional behavior and central GABA receptor expression in a mouse via the vagus nerve. PNAS. 2011;108(38):16050–16055. doi:10.1073/pnas.1102999108
- Mörkl S, et al. Multi-species probiotic supplement enhances vagal nerve function: results of a randomized controlled trial in patients with depression and healthy controls. Gut Microbes. 2025;17(1):2492377. doi:10.1080/19490976.2025.2492377
- NHS. Vitamins and minerals: B vitamins and folic acid. nhs.uk
About this guide. Last reviewed on 30 September 2026. Part of our guide to the vagus nerve. Nutrients are graded on the same Science / Trials scale we use across the guide, and every factual claim links to a source. Spotted something out of date? Email hello@meetyona.co.uk.
Disclosure. Yona makes Vagus One, which is featured in sections 07 and 08. The grades apply to nutrients, not products, and the page contains no paid placements.
This guide is for general information and is not medical advice. Speak to your GP or pharmacist before starting a supplement if you are pregnant, breastfeeding, taking medication or managing a health condition.