Meet Dr. Layman

World-Class Metabolism Expert Who Has Conducted Over 120 Research Studies

Extraordinary Accomplishments. 

Proven Results.  

Dr. Donald K. Layman is professor Emeritus in the Department of Food Science and Human Nutrition at the University of Illinois at Urbana-Champaign.


He is internationally recognized for his research about dietary protein and amino acids. He has extensive research focused on muscle development and in studies of metabolic regulation for obesity, diabetes and cardiovascular disease.


He is widely sought as a keynote speaker at professional meetings, medical conferences, and as a consultant to major food companies.


  • Over 120-peer reviewed research publications
  • 30 years as Professor of Nutrition at the University of Illinois at Urbana-       Champaign
  • Head of the Department of Foods and Nutrition
  • Associate Dean of the College of Agriculture
  • Doctorate degree in nutrition and biochemistry
  • Master’s degree in biochemistry

Dr. Layman's Areas of Research & Expertise




Body Composition




Blood Sugar

Dr. Layman's Recent Media Apperances

Dr. Donald K. Layman

has been a featured guest for countless podcasts, medical conferences, and professional meetings. To listen to a few of his podcasts and learn more about the science behind Metabolic, simply click one of the links to the right!   >  >  > 

Dr. Layman’s research led to a remarkable new discovery and an exciting new root-cause approach to lasting weight loss.  And it all begins with your metabolism.   


The discoveries of Dr. Layman were recognized with awards from the National Institute of Health and American Society of Nutrition among others. His novel research produced well over 120 publications in the most respected nutrition publications in the world.


Dr. Layman has devoted his life to advancing our knowledge and understanding of how our metabolism works.  He has conducted clinical trials for nearly two decades and advised in many more, leading to an entirely new understanding about how to optimize our macronutrient balance and metabolism. 


Advising NASA, branches of the military, non-profits and large corporations, Dr. Layman’s research has been widely used to shape the very latest nutrition guidelines. And now his decades of breakthrough scientific discoveries are being made available to you, as your very own nutrition advisor.

How Does Your Metabolism Compare?  

Check the age of  your metabolism now.

See how your metabolism compares to others your age using Dr. Layman’s Metabolic Calculator. Check your metabolic age (and health). 

Transform Your Metabolism With Dr. Layman's Metabolic Shake

Sample Publications from Dr. Layman's Research Studies

Carraro, F., W.H. Hartt, C.A. Stuart, D.K. Layman, F. Jahoor, and R.R. Wolfe. (1990) Whole body and plasma protein synthesis in exercise and recovery in human subjects. American Journal of Physiology 258:E821-E831.


Paul, G.L., J.T. Rokusek, G.L. Dykstra, R.A. Boileau, and D.K. Layman. (1996) Pre-exercise meal composition alters plasma large-neutral amino acid responses during exercise and recovery.  American Journal of Clinical Nutrition 64:778-786.


Layman, D.K., R.A. Boileau, D.J. Erickson, J.E. Painter, H. Shiue, C. Sather and D.D. Christou. (2003) A reduced ratio of carbohydrate to protein improves body composition and blood lipid profiles in adult women. Journal of Nutrition 133:411-417.


Layman, D.K., E. Evans, J.I. Baum, J.E. Seyler, D.J. Erickson & R.A. Boileau. (2005) Dietary protein and exercise have additive effects on body composition during weight loss in adult women. Journal of Nutrition 135: 1903-1910.


Layman, D.K., P. Clifton, M.C. Gannon, R.M. Krauss & F.Q. Nuttall. (2008) Protein in optimal health: heart disease and type 2 diabetes. American Journal of Clinical Nutrition 87:1571S.


Layman, D.K., E.M. Evans, P. Kris-Etherton, D. Erickson, J. Seyler, J. Weber, D. Bagshaw, A. Griel & T. Psota. (2009) Moderate protein diet produces sustained weight loss and long-term changes in body composition and blood lipids in obese adults. Journal of Nutrition 139:514-521.


Norton, L.E., D.K. Layman, T.G. Anthony, D.V. Brana, P. Bunpo & P.J. Garlick. (2009) The leucine content of a complete meal directs peak activation but not duration of skeletal muscle protein and mTOR signaling in rats. Journal of Nutrition 139:1103-1109.


Wilson, G.J., D.K. Layman, C.J. Moulton, L.E. Norton, T.G. Anthony, S.I. Rupassara & P.J. Garlick. (2011) Leucine or carbohydrate supplementation reduces AMPK and eEF2 phosphorylation and extends post-prandial muscle protein synthesis in rats. American Journal of Physiology 301:E1236-E1242.


Mamerow, M.M., J.A. Mettler, K.L. English, S.L. Casperson, E. Arentson-Lantz, M. Sheffield-Moore, D.K. Layman & D. Paddon-Jones. (2014) Dietary protein distribution positively influences 24-hour muscle protein synthesis in healthy adults. Journal of Nutrition 144(6):876-880.


Layman, D.K., T.G. Anthony, B.B. Rasmussen, S.H. Adams, C.J. Lynch, G.D. Brinkworth & T.A. Davis. (2015) Defining meal requirements for protein to optimize metabolic roles of amino acids. American Journal of Clinical Nutrition 101(6): 1330S-1338S.


Layman, D.K. (2017) A protein-centric perspective for skeletal muscle metabolism and cardiometabolic health. Chapter 18. In: Nutrition and Cardiometabolic Health, 1st Edition. N. Bergeron, P. Siri-Tarino, G.A. Bray, R.M Krauss, Eds. CRC Press. Boca Raton. ISBN# 9781498704267, pp. 333-348.


Paddon-Jones, D., Layman, D.K. (2019) Branched-chain ketoacid ingestion: an alternative to efficiently increase skeletal muscle protein synthesis. American Journal of Clinical Nutrition. AJCN 110:799-800.


Phillips, SM., Paddon-Jones, D., Layman D.K. (2020) Optimizing adult protein intake during catabolic health conditions. Advances in Nutrition 11:S1058-S1069.


Martin, A., G Ecklu-Mensah, CWY Ha, G. Hendrick, DK Layman, J Glibert & S Devkota. (2021) Gut microbiota mediate the FGF21 adaptive stress response to chronic dietary protein restriction in mice. Nature Communications 12(3838):1-11.

Check out Dr. Layman's Metabolism Series

Dr. Donald K. Layman helps cuts through the confusion and breaks down what metabolism means and introduces you to how you can optimize your metabolism.

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