Dr Jeans is a specialist sport, exercise and lifestyle medicine physician in Harare, Zimbabwe, where he has practised medicine for 30 years. He graduated in medicine from the Godfrey Huggins School of Medicine in Harare. After initially pursuing a medical career in the military and emergency medicine, he completed a postgraduate degree in Sports Medicine at the University of Cape Town. He is currently the Medical Director of the Rolf Valley Sports Medicine Centre, the Innovate High Performance Centre and the Low-Carb Companion Lifestyle Program. He has written many public information media articles and has given numerous lectures on topics relating low-carb, higher healthy fat nutrition to weight-loss, improved health outcomes and sports performance.