John M. Pettifor

John M. Pettifor is a Professor at the University of the Witwatersrand, Faculty of Health Sciences, Johannesburg, South Africa. His work focuses on pediatric health, nutrition, and bone metabolism, particularly in low- and middle-income countries.

• Research on vitamin D, calcium, and nutritional deficiencies
• Key affiliations: Chris Hani Baragwanath Hospital, Wits School of Public Health, National Osteoporosis Foundation

His recent publications (2023) address:

• Vitamin D biomarkers in South African women
• Adolescent growth and body composition
• Access to research in developing countries
• Mortality in infants with hypernatraemia

Supported by organizations including the Medical Research Council, NIH, and Wellcome Trust, his work underpins the VITALITY and BONE: CARE trials. Collaborations span institutions in South Africa, Uganda, and Nigeria, emphasizing global health equity.