The science of nutrition and healthy eating

Developed by The Open University, The science of nutrition and healthy eating is a structured eight-week course book that turns everyday eating into a fascinating scientific investigation. It is designed for curious learners who want to understand what happens inside the body from the first bite to nutrient absorption, and how food choices affect long-term health.

A Structured Journey Through Food and Nutrition

The course is organised into eight weekly topics. It begins with the basics of food itself — proteins, fats, carbohydrates, vitamins, minerals and fibre — before exploring the digestive system, hydration, food labels, energy balance, dietary patterns, food allergies and the psychology of taste. Each week includes quizzes and activities to reinforce understanding, so readers can test their knowledge as they progress.

From Digestion to Dietary Choices

Rather than presenting isolated facts, the material links biological processes to real-life decisions. Readers learn how the stomach and intestines process food, why pH and enzymes matter, and how nutrients travel through the body. The course then connects these mechanisms to practical topics such as interpreting food labels, calculating energy in food, and understanding official dietary guidance like the Eatwell Guide.

Practical Tools for Everyday Food Decisions

The book helps readers become more confident when shopping and planning meals. It explains traffic-light labels, allergen information, sweeteners, and how to assess hydration needs. A food diary activity encourages learners to reflect on their own eating habits, making the science personally relevant rather than purely theoretical.

Evidence-Based Insights into Allergies and Eating Behaviour

Later weeks address food allergy and intolerance, distinguishing between the two and describing common symptoms, diagnosis and management. The course also examines why people eat, how taste signals work, and how eating disorders can develop. These sections offer a balanced, scientific perspective without oversimplifying complex health issues.

Who Will Find This Course Book Useful?

This digital course book will suit anyone with an interest in nutrition, health, biology or human behaviour. It is especially useful for students preparing for further study, healthcare support workers, educators, and lifelong learners who prefer structured, university-level material that explains the science behind healthy eating in clear, accessible language.

With its open-university pedigree and practical focus, this ebook offers a comprehensive foundation in nutrition science that is ideal for independent study or as a refresher.