Food4All: A Multi-Agent Framework for Real-time Free Food Discovery with Integrated Nutritional Metadata

TL;DR

Food4All is a multi-agent system that enables real-time, context-aware discovery of free food resources with nutritional information, addressing accessibility gaps for vulnerable populations.

Contribution

It introduces a novel multi-agent framework combining data aggregation, reinforcement learning, and adaptive feedback for effective food retrieval in food-insecure communities.

Findings

Aggregates data from multiple sources for updated food resource info.

Uses reinforcement learning to optimize for proximity and nutrition.

Adapts retrieval policies based on user feedback and changing needs.

Abstract

Food insecurity remains a persistent public health emergency in the United States, tightly interwoven with chronic disease, mental illness, and opioid misuse. Yet despite the existence of thousands of food banks and pantries, access remains fragmented: 1) current retrieval systems depend on static directories or generic search engines, which provide incomplete and geographically irrelevant results; 2) LLM-based chatbots offer only vague nutritional suggestions and fail to adapt to real-world constraints such as time, mobility, and transportation; and 3) existing food recommendation systems optimize for culinary diversity but overlook survival-critical needs of food-insecure populations, including immediate proximity, verified availability, and contextual barriers. These limitations risk leaving the most vulnerable individuals, those experiencing homelessness, addiction, or digital illiteracy, unable to access urgently needed resources. To address this, we introduce Food4All, the first multi-agent framework explicitly designed for real-time, context-aware free food retrieval. Food4All unifies three innovations: 1) heterogeneous data aggregation across official databases, community platforms, and social media to provide a continuously updated pool of food resources; 2) a lightweight reinforcement learning algorithm trained on curated cases to optimize for both geographic accessibility and nutritional correctness; and 3) an online feedback loop that dynamically adapts retrieval policies to evolving user needs. By bridging information acquisition, semantic analysis, and decision support, Food4All delivers nutritionally annotated and guidance at the point of need. This framework establishes an urgent step toward scalable, equitable, and intelligent systems that directly support populations facing food insecurity and its compounding health risks.