[1] Following this, he continued to study at the University of Auckland, completing an MSc (Hons) in 1969 and a PhD[2] in cell biology in 1971 working with a group of plant growth hormones called cytokines.
He then undertook a staff scientist position at the National Institute for Medical Research, Mill Hill London, UK, working under Dr Jamshed Tata in Developmental Biology.
His research group then collaborated with Dr Fu-Keun Lin at Amgen to characterise the cellular receptor of the red cell hormone, erythropoietin, and its ability to stimulate platelet production.
Berridge has published popular science books including The Edge of Life in 2015, and Sugar, Rum and Tobacco: Taxes and Public Health in New Zealand with Lisa Marriott in 2017.
In 2003, Berridge received a James Cook Research Fellowship[4] in health sciences from the Royal Society Te Apārangi.