Barry Halliwell (born 18 October 1949)[2] is an English biochemist, chemist and university administrator, specialising in free radical metabolism in both animals and plants.
[4] He was later awarded a D.Sc from the University of London for his work on the biochemistry of free radical reactions in plant and animal systems.
[5][6] As of 2018 he is a professor in the department of biochemistry at the NUS Yong Loo Lin School of Medicine, where he holds a Tan Chin Tuan Centennial professorship.
[4] His textbook, Free Radicals in Biology and Medicine, co-written with John M. C. Gutteridge, is considered "an authoritative text in the field".
[8][9] His earliest research was in plants, where with Christine Foyer and others in 1976, he discovered the glutathione–ascorbate cycle (also known as the Foyer–Halliwell–Asada pathway) by which chloroplasts remove damaging hydrogen peroxide.
His interests include the characterisation of redox biomarkers for the identification of human diseases, molecular nutrition, the role of transition metal ions as promoters of radical reactions in vitro and in vivo, the development of drugs to prevent oxidative cell damage, the chemical nature of antioxidants in vivo, methods for the specific detection of reactive oxygen and reactive nitrogen species in vivo and their application to human disease, particularly stroke and neuro-degenerative diseases and ageing in humans and in the nematode Caenorhabditis elegans.