The global burden of tuberculosis (TB) and viral infections remains a significant public health challenge, particularly in the context of socioeconomic disparities and weakened immune systems. This paper explores the pivotal role of dietetics in providing sustainable solutions to improve patient outcomes in both TB and viral infections. It argues that optimal nutrition, guided by evidence-based dietary interventions, can enhance immune function, reduce disease severity, and improve the efficacy of medical treatments. Furthermore, the paper investigates the potential of Artificial Intelligence (AI) to streamline dietary assessments, personalise nutritional plans, and predict treatment responses. By integrating AI with dietetics, holistic and sustainable healthcare interventions for TB and viral infections can be more effectively developed and implemented.