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The Secret Diary of Kombucha Kev · 5 min read

Issue 2, 24 October 2026: I used to look six months pregnant by 3pm

Issue 2 of The Secret Diary of Kombucha Kev, aged 46¾. In which I discuss my stomach in more detail than anyone asked for.

Kombucha Kev, founder of Functional Drinks Club, smiling at the Otley taproom Kombucha Kev · 24 October 2026
The Secret Diary of Kombucha Kev, aged 46¾: Kick the bloat

Hello. I'm Kev. I'm 46¾, with a partner who won't marry me, a daughter who finds me embarrassing, two cats, two guinea pigs and a kombucha shop in Otley. I'm not a doctor, a biohacker or an influencer. Just a normal bloke trying to look after my gut while social media tells me to rub butter in my eyes to see better.

This is my diary: what I've written, what I've been drinking, and the week's gut science, minus the hype. It lands in inboxes every Saturday at 11am. Want it? Sign up in the footer.

Issue 2. In which I discuss my stomach in more detail than anyone asked for.

Monday
Wrote a whole article about bloating. Realised halfway through that I was describing myself from about 2019 to 2022. Looked at old photos. Closed old photos.

Then the first ever run of Gut Feeling, my own kombucha, landed at the shop. I held a box up over Manor Square like Rafiki presenting Simba to the Pride Lands. The Pride Lands was a man in a flat cap waiting for the bus. He did not bow.

Sticker of Kombucha Kev holding up bottles of Gut Feeling Zero Drama and Root Cause kombucha. Presenting Gut Feeling to the Pride Lands.

Tuesday
An influencer says the secret to gut health is a £90 powder that looks like a pond. The secret to gut health is also beans. Beans are 65p. I'm in the wrong business. Actually, I sell kombucha, so I'm in roughly the right business.

Packed and shipped the first Gut Feeling orders. I stroked every bottle and whispered "my precious" before letting it go. Out loud. In front of customers. One of them backed slowly towards the door.

Wednesday
Sober October has one week left. A customer told me he's "basically a monk now". He was holding a chocolate brownie the size of a hubcap. Respect.

Alan came all the way from Sheffield, on strict orders from his wife, to get some kombucha. He was the first person ever to buy Gut Feeling off the shelves. That's not a shopping trip, that's a mission. There should be a blue plaque. There won't be a blue plaque.

Sticker of Alan holding a box of Gut Feeling kombucha. Alan, customer No.1, sent by the wife.

Kirsty was the first to pre-order and buy it online, and came in to collect. Andy came in too. He's been backing me and Functional Drinks Club for longer than either of us would like to admit. Every business needs an Andy. Very few deserve one.

Stickers of Kombucha Kev with Kirsty, the first online Gut Feeling customer, and Andy holding two bottles of Gut Feeling kombucha like the FA Cup.

So, thank you all. I'm not crying. It's the vinegar.

Thursday
Opened another Peterston Baked Apple, last week's spotlight. I had it with the shop door open and rain coming across Manor Square. "There's no place like home," I said, clicking my heels. A woman walking past crossed the road.

Friday
Considered a cold plunge. Ran the bath cold. Put one foot in. Got out. Had a cup of tea. Personal growth comes in stages.

New on the website · kombuchaclub.co.uk journal

Is kombucha good for bloating? Trapped wind and swelling explained

Is kombucha good for bloating? Trapped wind and swelling explained

For years I blamed my age, stress and the odd curry that fought back. It was none of those. This is my honest bloating story: what changed (plants, something fermented every day, less booze), what the science actually backs, and why you shouldn't neck a whole bottle of kombucha on day one. As Mr Miyagi said: wax on, wax off, and patience.

Read the guide →

New on the website · alcoholfreedrinksclub.com journal

What happens when you stop drinking for a month? (Besides getting smug)

What happens when you stop drinking for a month? (Besides getting smug)

If you're doing Sober October, here's what your body's up to while you explain yourself at the bar. It's the actual Royal Free Hospital study, written up by a public health bloke who now sells beer for a living. Yes, I see the irony. There's also the side effect nobody warns you about: running.

Read the article →
This week in gut science, minus the hype

This week the lab coats followed the gut all the way to the brain.

A gut bug molecule linked to Alzheimer's The University of Wisconsin–Madison looked at blood from almost 1,200 people. Those with the most ImP, a compound made by some gut bacteria, had more signs of Alzheimer's-type changes and faster memory decline. In mice, ImP made it worse. In people it's a link, not proof, and there's no "eat this" tip yet. (Nature Communications, 3 Oct)
Read more →

Can your gut make a stroke worse? A study in Cell found that mice with more E. coli in their gut, producing a by-product called indole, had more severe strokes. In a small group of patients, more indole went with worse strokes too. The authors are clear it's not a test or a treatment yet. (Cell, via News-Medical, 2 Oct)
Read more →

Coffee drinkers, your gut has opinions University College Cork took 31 coffee drinkers off coffee for two weeks, then secretly gave half of them decaf. Both groups reported less stress, and coffee drinkers had different gut bugs. The decaf drinkers did better on memory tests, while the caffeinated lot felt less anxious and sharper. It's a small study, part-funded by a coffee industry body, and the authors say it doesn't prove cause. I'm having a coffee about it anyway. (Nature Communications, 28 Sep)
Read more →

We have a clean, high-antioxidant roast in the shop, and I wrote why we picked it.

Product spotlight

Gut Feeling Mixed Six Pack

Gut Feeling Mixed Six Pack

£38

"Can't decide? Don't."

After three years of selling everyone else's kombucha, I made my own. It sits on the shelf next to 60+ others, and it has to earn its place like everyone else. All four flavours in one box: 2x Root Cause (Ginger), 2x Zest Intentions (Black Orange), 1x Mane Event (Lion's Mane) and 1x Zero Drama (Ashwagandha). Each bottle lasts about three days at a small glass a day, so that's a fortnight of working out which one's yours. (It's Zest Intentions. Don't tell the others.) First batch, strictly limited.

Get the six pack →
The Health Hype Roast podcast

The Health Hype Roast Podcast

New ep every week

Everyone needs a James

James Ellis is a clinical nutritionist, and his main job on the podcast is stopping me spending a small fortune on whatever YouTube told me to buy at 1am. Without him, my cupboard would be full of mushroom coffee, magnesium spray and something called "structured water".

Everyone needs a James in their life. So every week, I lend you mine.

This week: fasting. Superpower, or just being hungry with extra steps?

Listen to this week's episode →

Available on every major podcast platform.

Got a health trend or supplement you want roasted? Email me at kevin@functionaldrinksclub.co.uk.

Same time next week: Saturday, 11am. Until then,

Kombucha Kev
Functional Drinks Club

P.S. Finishing Sober October next week and don't fancy going straight back to how things were? Zebra striping is the halfway house. Next week's diary covers it.

Kombucha Kev, founder of Functional Drinks Club, smiling at the Otley taproom
Written by Kev

I'm Kev. Twenty years in marketing, ten of them in public health, a former big wine drinker, and now the bloke behind Functional Drinks Club in Otley. I don't drink any more. I'm still fun at parties. Mostly.

Read my story
The Secret Diary of Kombucha Kev

Liked that? There's more where it came from.

Every Saturday at 11am, I write it all down: what I've been drinking, from kombucha to alcohol-free beer, wine and spirits, what's worth your money, and the week's gut science, minus the hype. From a normal bloke with a kombucha shop, a partner who won't marry him and no jawline to speak of. Less preachy than a wellness influencer. More useful than your group chat.

  • The week's gut science, fact-checked so I don't get sued
  • Honest reviews of kombucha and alcohol-free beer, wine and spirits. No paid-for gushing
  • New bottles and box deals first

Every Saturday, 11am. Unsubscribe whenever.

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Kompassion Scotch Bonnet Chilli raw kombucha in a tall amber 330ml glass bottle with a black cap and a white label with a red flavour band. Kompassion Scotch Bonnet Chilli raw kombucha on a tree-trunk table in the Otley taproom, with Kev's tasting note: "It's like sipping Christmas through a tartan straw while someone massages your liver with jazz hands."
Kompassion Kombucha Scotch Bonnet ChilliGinger and spice
Raw Live cultures
£4.00
You + I Black Cherry raw kombucha in an amber glass bottle with a gold cap and a cream label with a botanical line drawing and a deep red band. You + I Black Cherry raw kombucha on a wooden pallet table in the Otley taproom, with Kev's tasting note: "Like a goth fruit punch that went to finishing school."
You + I Black CherryFruity
Raw Live cultures
£4.15
Pop Cultures Apple & Cardamom raw jun kombucha in an amber 330ml glass bottle with a gold cap and a colourful orange and green patchwork label. Pop Cultures Apple & Cardamom raw jun kombucha on a wooden pallet table in the Otley taproom, with Kev's tasting note: "It's like Christmas did a mic drop in your mouth."
Pop Cultures Kombucha Apple & CardamomFruity
Raw Live cultures
£4.80
The box deal Mix any 6 for 5% off, 12 for 10%, 24 for 15%.

Every maker, Gut Feeling and the basics all count. Best discount wins, nothing stacks.

Kev and clinical nutritionist James Ellis at the mics under The Health Hype Roast neon sign
The podcast

The Health Hype Roast

Me and clinical nutritionist James Ellis take one big health trend each episode and roast it. Creatine, fibre maxing, collagen, weight loss jabs: what's real, what's rubbish, and what's worth your money. Expect laughs, evidence and the odd uncomfortable truth.