Ferment

Author Tim Spector
Narrator Leighton Pugh, Tim Spector
Publisher Random House
Publish Date 11 September 2025
Run Time 10 hours and 15 minutes
Format Audio
Genre Cookery: preserving and freezing, Food and beverage technology, Popular medicine and health: the human body, Popular science.

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What to expect

**AS SEEN ON ITV THIS MORNING**

Brought to you by Penguin.

From the world-leading gut scientist and no. 1 bestselling author of Food for Life, comes an introduction to the life-changing benefits of fermentation

Of all the ways to prepare food, fermenting is surely the most mysterious, miraculous and misunderstood. As Tim Spector shows in this groundbreaking book, the science is now clear that adding fermented foods to our diets brings an astonishing range of benefits for our health.

Drawing on his own cutting-edge research, and including practical tips for buying and making fermented foods, Tim demystifies the world of ferments, and introduces us to some of his favourites – from homemade kombucha and kefir, to sourdough, miso and coffee.

He explores the extraordinary science of fermentation and the transformative role of microbes, in our kitchens and in our guts – and reveals why fermenting is the key to good food and good health.

© Tim Spector 2025 (P) Penguin Audio 2025

Critics Review

The master of gut health and intelligent eating, Tim Spector makes the science of fermentation, and the goodness it can bring you, exciting to read about, and the recipes are so tempting and accessible that you’ll want to have a go for sure

Hugh Fearnley-Whittingstall

No one knows more about fermenting than Tim Spector - his insights have been life-changing for me

Davina McCall

I love this book just SO much. Fermentation is the original wellness hack - and Tim reminds us that the best health breakthroughs can begin in a jar.

Liz Earle

A super healthy and tasty gift for you and your gut microbiome - discover the joy of fermenting with Tim's expert guidance

Dr Clare Bailey Mosley

The nutrition revolution is well underway and Tim Spector is one of the visionaries leading the way. His writing is illuminating and so incredibly timely

Yotam Ottolenghi, praise for SPOON-FED

Tim Spector makes healthy eating exhilarating, empowering and achievable

Hugh Fearnley-Whittingstall, praise for FOOD FOR LIFE

Tim Spector has been exploding the myths around food and health for years

The Times, praise for FOOD FOR LIFE

Tim Spector has done more than anyone to popularise the microbiome…Now with Ferment, Spector focuses on foods that can contribute their own cargo of friendly bacteria and yeasts

Financial Times

A persuasive, meticulously researched book… By the end of the book, I had jars of kombucha and sauerkraut brewing in my pantry

New Scientist

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