How much protein we should eat and why older people need more: an interview with Professor Donald Layman

The Health Detective: Presented by Susan Birch

26-12-2021 • 1 hora 24 minutos

Today it was a real privilege to talk to the world-leading expert, Professor Don Layman about protein. Professor Layman is considered the "Godfather" of protein.  I have followed his research over the years and this has been base for my own understanding of the importance of protein and how it works in our bodies.

I believe that protein is the most misunderstood part of our diets and if we optimised our protein intake, we would have much better health. I have summarised a lot of Professor Layman's research in my videos on protein. If you are interested in learning and understanding more, then check these out on YouTube.

Professor Layman and I talk about how much protein we should eat and why older people need more. We delve into the myths that protein causes cancer, kidney disease and osteoporosis. We discuss the best sources and options for vegetarians. We also talk about athletes and kids health. I hope you will enjoy listening as this wonderful and humble man shares his knowledge with us.

Dr Layman discusses;
- Protein needs
- Muscle maintenance
- Role of amino acids
- Importance of leucine to trigger muscle growth
- How do our protein needs change with age
- Children, protein needs and growth
- Ideal protein ranges for adults
- Protein intakes during time-restricted eating and fasting
- How to keep metabolic rate high and burn fat with calorie restriction
- Vegan sources of proteins
- Insulin and mTOR response
- Leucine and first phase insulin response
- Insulin resistance and diabetes

More information can be found at:

About Dr Donald Layman, PhD
- Professor Emeritus in the Department of Food Science & Human Nutrition at the University of Illinois at Urbana-Champaign
- Served on the faculty at the University of Illinois from 1977 – 2012.
- Recognised for research about protein and amino acid metabolism, nutrition for athletic performance, obesity, diabetes and cardio-metabolic health
- More than 100 peer-reviewed publications
- Has numerous awards for his research and nutrition teaching
- Served as Associate Editor of The Journal of Nutrition from 1989 through 1993
- Currently serves as an Associate Editor of the Journal of Nutrition Education and Behaviour
- On the editorial boards of Nutrition & Metabolism, and Nutrition Research and Practice
- Is a consultant to numerous food companies and commodity organizations
- Completed his B.S. and M.S. degrees in chemistry at Illinois State University
- Completed his PhD in human nutrition and biochemistry at the University of Minnesota

If you enjoyed this podcast, please subscribe, like and share.

If you have any guests you would like to hear from or questions answered please let me know. Email

You can sign up for my newsletter to keep up-to-date with the content I am publishing, monthly blogs and Q & A webinars with experts from around the world.

You can download my free health and wellbeing planner, and my handy guide to protein on the free resources page on my website.

You can follow me on Facebook here: