Bloated by four. Backed up for days. Mapping the loos before you leave the house. It isn’t always the food. Daily nutrition for the nerve that runs your digestion. Nothing to cut out.
Why your gut keeps picking its moments whatever you cut out, and the part of digestion almost nobody feeds.
It’s been a good fortnight. You’d started to think you’d finally cracked it.
Then it comes back. The waistband that’s tight by four. The wind you spend a whole meeting holding in. The sudden, urgent need for a loo at the worst possible moment, and the tap you run so nobody hears.
You’ve done everything right:
And it still shows up. On the stressful days. In company. Whatever was on the plate.
Here’s the part most people never get told: digestion isn’t only chemistry. It’s signalling.
Your vagus nerve is the line between your brain and your gut. It tells your stomach a meal is coming, and tells your gut when to move things along. It does that with a chemical messenger, acetylcholine, which your body has to build from nutrients. Every day.1
When you’re rushed or braced, your body turns that signal down.2 And no food list can turn it back up.
It’s not the bread. It’s not willpower. And it’s not your fault.
It isn’t you. It’s what a food list can’t reach.
The four o’clock bloat. The wind. The dash. You know exactly what this is.
Usually bread. It feels like doing something. Your list of safe foods gets one shorter.
You relax. You stop checking. It was also, as it happens, a quieter fortnight.
Same bloat, same waistband. And this time you hadn’t even eaten the thing.
Each round, the list gets shorter. The signal never gets fed.
One honest caveat. If a food genuinely disagrees with you, keep avoiding it. But if the pattern follows your week and not your plate, food was never the whole story.
Cutting out another food never gave you these. Here’s how Vagus One helps with each.
The restaurant you don’t look up online first. The plate you finish. The drive home spent on the conversation, not on what your stomach is about to do.
Digestion starts before the first bite, with a message from brain to gut that a meal is on its way. Vagus One supplies what that messenger, acetylcholine, is built from: citicoline for one half, vitamins B1 and B5 for the other.
The jeans that fit at breakfast. The top button that doesn’t make it to the end of the day. The loose dress you keep for bad-stomach days.
Between meals, your gut runs a cleaning wave that keeps things moving along. It runs on acetylcholine, and making acetylcholine takes vitamin B1. Vagus One carries two forms of it, water-soluble and fat-soluble.
A 2025 review in Frontiers in Nutrition describes how the B1-dependent enzyme that makes acetyl-CoA underpins acetylcholine production in the gut’s own nerve cells. Read the review
The meal that’s still with you three hours later. Two days of nothing, then three. The morning that can’t start until your gut decides it can. The holiday it never quite joins.
Your gut is one long muscle, and its rhythm is set by nerves. The vagus nerve is the line from your brain that keeps it moving: when to squeeze, when to pass things along, when to clear the way for the next meal.1 A nerve that busy is hungry tissue. Vagus One feeds it directly, with B1 in two forms, active B2 and magnesium.
The sudden, non-negotiable need that arrives on the motorway, in the queue, ten minutes into the meeting. Running the tap in someone else’s bathroom. Waiting for the office toilets to empty so nobody knows it was you.
Your gut and your brain share one line, and it runs both ways. That’s why a tense morning and an urgent stomach so often arrive together.2 So Vagus One isn’t only nutrition for the nerve. L-theanine and saffron are in there too, for the state your gut does its work in.
A sudden change that lasts needs your GP, not a supplement. See “When should I see my GP instead?” below.
The probiotic. The enzymes. The peppermint capsules. The charcoal tablets at the bottom of your bag. The app you log your lunch in.
You take it the way you take a vitamin. Two capsules, with a meal. That’s it. Nothing to cut out, time or track. Of customers who noticed a change, 64% noticed inside four weeks. Ninety days is the fair test, which is why the 90-day supply comes with a money-back promise.
Self-reported survey of 748 Yona customers, 2026. Individual experiences; results vary.
Most gut supplements work on what’s in your gut. Vagus One feeds what’s telling it what to do.
Nerves are hungry tissue. Two forms of vitamin B1, active riboflavin and magnesium feed the energy metabolism the nerve itself runs on.
Acetylcholine is built from two halves: choline, and an acetyl group your body makes with the help of B1 and B5. Citicoline brings the choline. The rest of this layer covers the acetyl side.
Digestion is a rest-state job. An amino acid from tea leaves and a standardised saffron extract, for the half of the equation that doesn’t work while the rest of you is braced.
Per two capsules. Thiamine, riboflavin and magnesium contribute to normal functioning of the nervous system; pantothenic acid contributes to normal synthesis and metabolism of some neurotransmitters.
Ten years of gut issues… I’ve tried a lot of different things over the years, and there’s only a handful that I can say made a tangible, measurable difference. The longer I take it, the better I feel.
Within the first week I felt a massive difference and have continued using these daily. I have less bloating… Feeling a lot calmer too.
I have been taking these capsules for a few months to try and stop my excessive burping and after the second/third bottle I realised I’d virtually stopped burping completely.
I was skeptical that this product could support me, but on reflection my general regulation — nerves, stomach, sleep — have all improved and I’ve felt supported.
I have been taking it for nearly a month and I can feel the difference… less bloating, and don’t seem to get any acid indigestion.
I didn’t think this would work. I was very suspicious. However after 6 weeks I am much more settled and don’t have the gut issues.
…to be able to have a meal and not panic about feeling uncomfortable afterwards.
Ninety days to see how it fits you, with a money-back promise if nothing changes.Try it for 90 days
Reviews from Yona customers, including Vagus+, the formula Vagus One grew out of. Headlines are pulled from each review; trimmed for length where marked. Individual experiences vary.
Specialises in autonomic nervous system function and its effect on digestive health: the exact biology Vagus One is built around.
Twenty-five years in clinical nutrition, working with people who haven’t responded to conventional approaches.
One bottle and two refills, plus a free bottle of Gut Repair+: the signal, and the gut lining it arrives at. Ninety days to judge it properly, with our money-back promise if nothing changes.
“My general regulation — nerves, stomach, sleep — have all improved.”
Jules Z · Verified reviewYour 90 days start when your order arrives. Take it every day for the full 90 days. If nothing has changed, email hello@meetyona.co.uk between day 90 and day 120 and answer a few short questions about how you took it.
We’ll refund what you paid for your first 90-day supply. You don’t need to send anything back.
The 90-day promise applies to the 90-day supply only; the 30-day supply is outside it. Your 90 days start the day your order arrives. Take Vagus One every day, as directed, for the full 90 days. If nothing has changed, email hello@meetyona.co.uk between day 90 and day 120 and answer a few short questions about how you took it.
We’ll refund what you paid for your first 90-day supply. You don’t need to send anything back. On a subscription, your next delivery is billed about three months after you order; if you’re planning to claim, skip or cancel it first. Your statutory rights are unaffected.
Pick the pattern that sounds most like yours.
Maybe you wake up fine and it builds through the day, whatever you eat.
Maybe it’s worse on desk days: lunch in ten minutes, straight back onto a call.
Or it shows up hours after the meal, when you’d forgotten what you even had.
Maybe it’s the knot before a presentation, or the dash to the loo before a flight.
Maybe your gut is fine on holiday and awful in a deadline week.
Or you’ve been told it’s “just stress”, as if that made it any less physical.
Maybe a normal dinner sits like a brick until bedtime.
Maybe you’re full after half a plate.
Or mornings are sluggish until the second coffee does the job for you.
Maybe you’ve done the elimination diet and the reintroduction.
Maybe there’s a drawer of half-finished probiotics.
Or your tests came back “normal” and you were sent home with a leaflet.
Nine actives. Two capsules a day. Ninety days to see how it fits you.
Free Gut Repair+ · 90-day money-back promise
Cited as published research on the underlying biology, not as studies of Vagus One. Survey figures are self-reported by 748 Yona customers, 2026.
