Gut Health Nutritionist: How Nutrition Can Support a Healthy Gut
Let me describe a conversation I have most weeks.
Someone sits down, slightly apologetic, and says: "It's probably nothing. I've just got a sensitive stomach." Then they tell me they've cut out bread. And dairy, for a month, which did nothing. And they're on their third brand of probiotic drink. And they still have to undo the top button of their trousers by three in the afternoon, every single day.
By the time most people reach me, they've already done the obvious things. They've just done them in the dark.
So let's put the light on. Here's what a gut health nutritionist actually does, how food changes the way your gut behaves, five things you could start this week, and the symptoms that mean you should see your GP first, because sometimes that genuinely is the right call.
What does a gut health nutritionist do?
The job is to find out why your gut is playing up. Not guess. Find out.
Take bloating, since almost everyone arrives with it. It might be a food you react to. It might be that you eat lunch standing at the kitchen counter in four minutes flat while answering an email. Stress does it. Some medications do it. So can bacteria settling where they shouldn't in the small intestine, which is what people mean by SIBO.
Those are completely different problems. And here's the bit that bothers me: if you guess wrong, you've given up a food you love for no reason at all. I've met people who hadn't eaten bread in two years for a problem that turned out to be how fast they were eating.
Which is why a first session with me is mostly talking. Your health story from childhood onwards, because gut problems often have longer roots than people expect. A normal day of eating, not an aspirational one. How you sleep. What else is going on in your life. Sometimes a test adds what talking can't, and sometimes it doesn't, and I'll tell you which.
Quick question before you read on: when did your symptoms actually start? Not "a while ago". Was there a holiday, a course of antibiotics, a stressful year, a house move? People often find the answer surprises them once they look properly.
I see this across the whole family
Worth saying clearly, because people assume gut work is a women's-health thing.
I work with women, men and children. Gut symptoms turn up in all three, and they look different in each. A seven-year-old with recurring tummy aches before school is telling you something quite different from a 45-year-old man with reflux he's been sitting on for years because he didn't want to make a fuss.
Digestion also sits underneath a lot of what I do in fertility support, which is my main focus. You can eat beautifully and still be short of what you need if absorption isn't working. For anyone preparing to conceive, that's not a side issue. It's the whole foundation.
How gut health nutrition works, day to day
Your gut is home to trillions of microbes, and they eat whatever reaches them from your plate. That's the simplest way to think about it. You're not just feeding yourself.
Plant variety, and the number that surprises people
Fibre feeds many of your gut bacteria. But eating the same oats and the same broccoli every single day isn't the goal. Variety is.
The American Gut Project, a large citizen science study, compared people eating more than 30 different plant types a week against those eating 10 or fewer, and found the high-variety group had more diverse gut microbiomes. Worth knowing that this particular comparison involved small groups, around 40 people each, so treat it as a useful signpost rather than a law of nature.
Thirty sounds ridiculous until you start counting. Porridge oats, a banana, a few walnuts. That's three, and you're still in your dressing gown. Lentil soup with parsley on top, cumin in the
evening curry, and you're at six before you've touched a vegetable. Herbs count. Spices count. Nuts, seeds, beans, grains, all of it counts.
How many do you think you managed last week? Most people guess high and land around 12.
Fermented foods, where the evidence is genuinely good
This is the one I'd put money on. A randomised trial at Stanford put 36 healthy adults on either a high fermented food diet or a high fibre diet for ten weeks. The fermented food group increased their microbial diversity and showed decreases in 19 inflammatory markers, including interleukin-6. The high fibre group, interestingly, didn't show the same inflammatory changes over that timeframe.
That doesn't mean abandon fibre. Fibre does other jobs. It does mean live yoghurt, kefir, sauerkraut and kimchi are earning their reputation.
Start with one spoonful. I mean it. If your gut is already touchy, enthusiastically piling in four fermented foods on day one will teach you nothing except how to have a miserable evening.
What's on the plate
Meals with some protein and healthy fat keep blood sugar steadier, which is easier on digestion generally. Ultra-processed food doesn't need banning, and I'm not going to pretend I've never eaten a supermarket sandwich. It just tends to quietly take the place of the fibre-rich food your bacteria are relying on.
How you eat, which nobody wants to hear
Sit down. Chew. Put the phone away if you possibly can.
Digestion is run partly by the nervous system, and your body is not enthusiastic about digesting while it thinks you're being chased. A rushed lunch at your desk can genuinely turn up as bloating at four o'clock. This is free, it takes no willpower, and it is the single most ignored piece of advice I give.
Signs your gut could use some help
Regular bloating or wind. Constipation one week, loose stools the next. Reflux that won't quit. An energy slump that lands reliably after meals. Food reactions that weren't there a year ago.
All of it is common. None of it is something you simply have to live with, and "my stomach's just like that" is a sentence I'd like to retire.
Five things to try this week
Add one or two new plants a day, building slowly so your gut can adjust.
Keep a food and symptom diary for two weeks. It regularly reveals what people hadn't noticed, and it costs nothing.
Drink more water as the fibre goes up. Fibre without fluid is not a kindness.
Make one meal a day unhurried. One.
Skip long elimination diets unless someone is guiding you. Cutting out lots of foods shrinks the variety your gut needs, which is the opposite of the plan.
For a simple starting point, there's a free guide to healthy digestion on the website.
When to see your GP first
Food won't fix everything, and some symptoms need a doctor before any change of diet. Please don't sit on these ones:
Unexplained weight loss
Blood in your stools
Vomiting that keeps coming back
Trouble swallowing
Severe or worsening pain
A bowel habit that has changed and stayed changed
I'd rather you booked a GP appointment and came to me afterwards than the other way round.
Choosing a gut health specialist in London
A good one asks a lot of questions before suggesting anything at all.
Be wary of a standard diet sheet handed to everyone, or a long supplement list with no explanation of why any of it is on there. You want a plan that changes as you improve, someone clear about where they trained, and someone perfectly happy to work alongside your GP.
With me, that looks like a free discovery call, a detailed first consultation, and follow-ups to see how you're actually getting on.
Questions people often ask
What does a gut health nutritionist do?
Looks at your symptoms, diet, history and lifestyle, plus tests if they'd genuinely add something, to work out what's driving your digestive problems. Then builds a plan around what we find rather than around a template.
How long does it take to improve gut health with food?
Some people feel calmer within a couple of weeks. If stress or a long-standing issue is involved, think months rather than days. Anyone promising you a fortnight is guessing.
Do I need gut testing?
Not everyone does. Food and lifestyle changes come first. Testing earns its place when symptoms drag on or the basics haven't worked, and I'd rather spend your money on a test that changes the plan than one that just produces an interesting document.
Can nutrition help with IBS, bloating or SIBO?
Often yes, for managing symptoms. Get a diagnosis from your doctor first so we know what we're working with.
Should I take probiotics?
Maybe. Try fermented foods first, since that's where the better evidence sits, and ask a practitioner before buying a supplement.
Do you work with children?
Yes. Recurring tummy aches, constipation and fussy eating are common, and children need a gentler, slower approach than adults.
So where does that leave you?
There's no magic food for the gut. It comes down to plenty of different plants, regular unhurried meals, a bit of patience, and finding out what's actually behind your symptoms instead of guessing in the dark.
If you've tried the basics and you're still uncomfortable, a gut health nutritionist can save you a lot of wasted effort and at least one abandoned food group.
Want to know what's actually behind your digestive symptoms? Book a free discovery call and let's talk it throug
References
McDonald, D., Hyde, E., Debelius, J.W., et al. (2018). American Gut: an Open Platform for Citizen Science Microbiome Research. mSystems, 3(3), e00031-18. journals.asm.org/doi/10.1128/msystems.00031-18
Wastyk, H.C., Fragiadakis, G.K., Perelman, D., et al. (2021). Gut-microbiota-targeted diets modulate human immune status. Cell, 184(16), 4137–4153. cell.com/cell/fulltext/S0092-8674(21)00754-6
Leeuwendaal, N.K., Stanton, C., O'Toole, P.W., Beresford, T.P. (2022). Fermented Foods, Health and the Gut Microbiome. Nutrients, 14(7), 1527. mdpi.com/2072-6643/14/7/1527
Mayer, E.A., Nance, K., Chen, S. (2022). The Gut-Brain Axis. Annual Review of Medicine, 73, 439–453. annualreviews.org/doi/10.1146/annurev-med-042320-014032
National Institute for Health and Care Excellence. Irritable bowel syndrome in adults: diagnosis and management (CG61). nice.org.uk/guidance/cg61
NHS. Irritable bowel syndrome (IBS). nhs.uk/conditions/irritable-bowel-syndrome-ibs/
Comments