Can you slow ageing with your diet? A new book gives it a go

image via New Scientist

April 22, 2026, 6:00 PM

• •David Cox, a health journalist, aims to lower his biological age by changing his diet.
• •The book explores various drivers of aging, including calorie intake, fiber, and micronutrients.
• •Cox experiments with dietary changes, visiting laboratories for tests and measurements.
• •The review praises the book's engaging approach while critiquing its lack of comprehensive guidance.

In 'The Age Code,' David Cox, a health journalist, documents his quest to lower his biological age through dietary changes after discovering he was aging faster than expected. Cox explores various drivers of aging, emphasizing the importance of diet, and chronicles his attempts to reduce his exposure to these factors, with mixed results. The book offers a detailed look at the science of food and its impact on aging, but it lacks clear guidance on how to integrate the various dietary recommendations. Despite its shortcomings, the book is an engaging read and offers valuable insights for those interested in nutrition and longevity.

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