Ademilola Adetuyibi was professor of medicine at the University of Ibadan, Nigeria. Born in Ghana of Nigerian nationality, his father John Adebiyi Adetuyibi, was a merchant. After attending Oduduwa School in Ile-Ile, Nigeria, he studied medicine at the University of Ibadan and University College Hospital (UCH), Ibadan in Nigeria, and at Cambridge University in the UK. After qualifying he did house jobs and held registrar posts at UCH in Ibadan from 1965 to 1970. During this time he also spent three months with the Armed Forces Medical Services of Nigeria in early 1969.
Appointed honorary consultant physician to the UCH, and lecturer, then senior lecturer, at the University of Ibadan, he became professor of medicine in 1973.
The author of several important scientific papers on diabetes and its complications, he also wrote Companion to clinical medicine in the tropics (London, Macmillan, 1980) a textbook which was aimed at both undergraduate and postgraduate students of medicine.
He read widely outside the medical field and greatly enjoyed building up his collection of African works of art.
In 1966 he married Atinuke Olabisi née Omigbodun whose father, Juliua Ladunjoyre Omigbodun was both a clergyman and teacher. They had two sons, one of whom was called Adeoye, and a daughter.