School of Agriculture, Food and Rural Development

Staff Profile

Dr Georg Lietz

Senior Lecturer



PhD in Nutrition at Oxford Brookes University, U.K.
Degree in Nutrition at Giessen University, Germany (Dipl.oec.troph.)
Training in Chemistry and Agriculture


Roles and Responsibilities

Teaching undergraduate Honours and MSc students
Supervision of PhD students
Leading a research team investigating nutrient/gene interactions



Ph.D. at Oxford Brookes University, U.K. Title of research project: “Use of red palm oil in vitamin A deficiency: studies on its analysis, stability and field application”.

Diploma (Dipl.oec.troph.) in "Human Nutrition and Home Economics", Justus-Liebig Universität, Giessen, Germany.

Practical training as a technician for agriculture (LTA) at the Justus-Liebig Universität, Institute for Plant Breeding and -Production, Giessen, Germany.

Practical training as a technician for chemistry (CTA) at the Berufsfachschule für technische Assistenten, Bochum, Germany.



Member of the Nutrition Society (since 1995)
Member of the Deutsche Gesellschaft für Ernährung (since 1987)
Member of the International Carotenoid Society (since 1998)
Member of the European Nutrition Leadership Programme Alumni Association (ENLP-AA) (since 1998)


Research Interests

Gene/nutrient interaction

Vitamin A/beta-carotene metabolism

Polyunsaturated fatty acids

Tea polyphenols



Our laboratories are well equiped with the latest technologies enabling us to genotype known polymorphisms and to detect new polymorphisms in genomic DNA samples. We have expertise to investigate nutrient/gene interactions using different molecular biology techniques.  In collaboration with the Northern Institute of Cancer Research (NICR) we developed a new LCMS method to investigate micro-nutrient absorption and metabolism using 13C stable isotopes.

Current Work

Our group currently investigates transporters and enzymes involved in carotenoid and polyphenol metabolism to discover the underlying mechanisms of observed high inter-individual variations in response to these two nutrient classes. We have discovered a range of functional single nucleotide polymorphisms (SNPs) in key genes involved in carotenoid metabolism and are currently investigating their importance in fat metabolism, diabetes and obesity.  



Our funding comes from a range of funding bodies, including the Food Standard Agency, BBSRC, EU FP6 and Industrial sponsorship from DSM.



Gene/nutrient interactions
Carotenoids/ Vitamin A
Tea polyphenols 


Undergraduate Teaching

Lectures, Tutorials, Seminars and Practicals for undergraduate Food and Human Nutrition students.