Nutritional Supplement Delivery Methods through Community Health Teams in Rural South American Villages: A Systematic Literature Review

Nutritional deficiencies are prevalent in rural South American communities, highlighting a need for effective supplementation delivery mechanisms. A comprehensive search strategy was employed across multiple databases including PubMed, Scopus, and Web of Science. Studies were screened based on predefined inclusion criteria focusing on interventions involving CHTs for nutritional supplement delivery in rural South America. The review identified a significant proportion (35%) of studies using community-based health workers to deliver supplements with positive effects on dietary intake and health outcomes, particularly among children under five years old. Community health teams are effective conduits for delivering nutritional supplements in rural South American settings, especially when combined with targeted interventions tailored to local contexts. Future research should prioritise the integration of community feedback mechanisms into supplement delivery programmes and evaluate long-term sustainability impacts. Treatment effect was estimated with logit(pᵢ)=β₀+β^ Xᵢ, and uncertainty reported using confidence-interval based inference.