Home Health How did super-fit ex-athlete Dion Howell develop prediabetes and is it down... Health How did super-fit ex-athlete Dion Howell develop prediabetes and is it down to her DNA? July 11, 2022 7 0 FacebookTwitterPinterestLinkedin Dion Howell, 41, pictured has always been a slim size eight and has a healthy vegetarian diet. Yet a blood test in March 2000 shocked test revealed the former athlete from South London had prediabetes.