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Immune Health

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What to expect

We are surrounded by bold claims and quick fixes for improving our immune systems. In this expert guide, leading immunologist Daniel M. Davis sorts the fact from fiction.

  • Is it true that orange juice can help ward off colds?
  • How does age affect our immune system?
  • Is mental health really connected to inflammation?


How do we separate the bogus claims from the useful advice? And given its sheer complexity, is there anything we can do to improve our immune system?

World-renowned immunologist Daniel M. Davis examines the effects of stress, diet, age, exercise, the microbiome and more on the immune system, punctures the key myths, and equips us to make informed choices for ourselves.

'Brilliant. Will change the way you think about your body and live your life' CHRIS VAN TULLEKEN

'A world expert offers practical tips and dispels many myths' TIM SPECTOR

'Illuminating ... fascinating' DAILY MAIL ** BEST BOOKS OF THE YEAR 2025 **

Previously published as Self Defence

© Daniel M Davis 2026 (P) Penguin Audio 2026

Author Daniel M Davis
Narrator Daniel M Davis
Duration 6 hours and 53 minutes
Release Date
ISBN 9781807844653
Format Audiobook
Publisher Random House
Genre Coping with chronic or long-term illness or conditions, Diets and dieting, nutrition, Human biology, Popular medicine and health: the human body, Popular science
Availability AU, GB, IE

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