Campbell has followed a social pedagogical education. She has gained a lot of work experience with counselling mentally disabled adults and children and with psychiatric illnesses. Moreover, she grew up with a mentally and physically limited family member and therefore has a great affinity with this target group. Campbell worked as a dietitian at an independently established dietitian practice, at Mediant (psychiatry) and at the Estiv care centers (care for the disabled) and worked for many years with light and moderate mental disabilities in a residential group. Campbell has been a pediatric dietitian since 2013 and obtained her degree in Orthomolecular Medicine in 2017.