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The Secret Diary of Kombucha Kev · 4 min read

Issue 1, 17 October 2026: Against medical advice

Issue 1 of The Secret Diary of Kombucha Kev, aged 46¾. In which I start a newsletter, against medical advice.

Kombucha Kev, founder of Functional Drinks Club, smiling at the Otley taproom Kombucha Kev · 17 October 2026
The Secret Diary of Kombucha Kev, aged 46¾: Against medical advice

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 1. In which I start a newsletter, against medical advice.

Monday
Decided to start a weekly newsletter. My partner asked who it was for. I said "the people". She asked which people. I went and stacked the fridge. (She also still won't marry me. Unrelated. Probably.)

Tuesday
A man on Instagram with a jawline you could slice bread with told me to put butter in my coffee and stare at the sun for ten minutes. I have done neither. I had a kombucha and stared at a spreadsheet for ten minutes. Similar effect on the eyes.

Wednesday
Put Athletic's new non-alcoholic pilsner on tap at the taproom. Tried it on camera first, which means there's now video evidence of my face trying to look like a beer expert. It was very good. The pils, not my face.

Thursday
Someone in the shop asked me if kombucha would "detox" them. I said the only things that detox you are your liver and your kidneys, and they've been doing it for free since you were born. She bought a box anyway. I'm counting that as a win for science.

Friday
Wrote this newsletter. Rewrote it. Read it aloud to the cats. The cats left the room. Read it to the guinea pigs. They squeaked, which I'm taking as a standing ovation. "You're gonna need a bigger boat," I said, to nobody. Scheduled it anyway.

Here's the deal: every Saturday at 11am, this lands in your inbox. What I've written, what I've been drinking, and the gut science, minus the hype. Put the kettle on. Or the kombucha. I'm not your mum.

New on the website · kombuchaclub.co.uk journal

Kombucha benefits: what it actually does (and what it doesn't)

Kombucha benefits: what it actually does (and what it doesn't)

You've seen kombucha in the hand of someone doing cartwheels in a meadow on Instagram. There's usually a butterfly. I'll be straight with you: if you can't do a cartwheel, kombucha won't fix that. This is what the science really says, including the Stanford study and the tiny-but-interesting Georgetown trial, plus the bits the internet makes up. Spoiler: it's a drink, not a miracle.

Read the guide →

New on the website · alcoholfreedrinksclub.com journal

Athletic Noble Pils review: the non-alcoholic pilsner we put on tap

Athletic Noble Pils review: the non-alcoholic pilsner we put on tap

It's floral, crisp and an actual pilsner, not "pilsner-flavoured". A word of warning, though: Athletic is the official beer of people who swapped hangovers for five-hour runs. Drink enough of it and you might wake up wanting to jog. I take no responsibility.

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

Read by me so you don't have to. Fact-checked so I don't get sued.

Our ancestors' gut bugs are going extinct (in us) Stanford and UC Santa Barbara compared the gut microbes of the Hadza in Tanzania and the Tsimané in Bolivia. They live an ocean apart, yet they share 1,231 bacterial species. Around 60% of those are rare or missing in people living industrialised lives. Whether that's behind modern diseases is, in the researchers' words, "still unresolved". It's still a good argument for eating more plants and fewer things in wrappers. (Nature, 7 Oct)
Read more →

Sugar and antibiotics: a bad double act NYU Langone followed 173 hospital patients and logged more than 9,000 meals. More sugar around a course of antibiotics was linked to more loss of gut bacteria diversity, and to a troublemaker called Enterococcus moving in. It's an association in a very specific group of patients, not proof. Still, next time you're on antibiotics, maybe go easy on the biscuit tin. (Nature, via ScienceDaily, 7 Oct)
Read more →

Gut to heart: one to watch Georgia State found that in mice with long-term gut inflammation, changes in their gut bacteria contributed to their hearts enlarging. It's early mouse work, but it's another sign your gut doesn't keep its problems to itself. (Circulation Research, 8 Oct)
Read more →

And one about kombucha (in mice) University of Minnesota mice given kombucha for seven weeks showed fewer anxiety-type behaviours, and their gut bacteria shifted. Before anyone's influencer cousin puts that on a T-shirt: they're mice, and the lead researcher calls it "preliminary". (Food Bioscience, 15 Oct)
Read more →

Mix any 6 drinks for 5% off, 12 for 10% and 24 for 15%. No codes, and no countdown clock shouting at you.

Product spotlight

Peterston Tea Kombucha Baked Apple

Peterston Tea Kombucha Baked Apple

£4.90

"Apple crumble swapped the custard for bubbles."

Peterston's seasonal brew uses apples and black tea from their own farm in the Vale of Glamorgan, one of the first commercial tea farms in the UK. It's soft, rounded and gently sparkling. It's made for Bonfire Night, Sunday roasts and anyone who says "I just love autumn" without a hint of irony. Once the apples are gone, it's gone.

Mix it into any box of 6, 12 or 24 and save up to 15%.

Grab a bottle →

Until next Saturday,

Kombucha Kev
Functional Drinks Club

P.S. Noble Pils and two kombuchas are on draught at 7 Manor Square, Otley. Bring a bottle and fill it up to take home. The cats are not available for comment.

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.