This systematic review explores the impact of functional probiotic food groups on enhancing CD4 cell counts in HIV-infected individuals, addressing the challenges posed by gastrointestinal tract damage and immune system impairment. Probiotics, prebiotics, and synbiotics were shown to significantly increase CD4 levels, highlighting the importance of integrating these into the diets of HIV patients. The document emphasizes the need for nutritional education to promote probiotic-rich foods, such as yogurt, as beneficial for gut health in the HIV-infected population.