Redefining functional foods: A structured product development framework for researchers and developers

Abstract

Background: Functional foods represent a rapidly evolving intersection of nutrition science, bioactive compound research, and preventive health strategies. Despite growing global interest, the field suffers from definitional ambiguity and methodological inconsistency, creating obstacles for researchers, product developers, and regulatory authorities alike. The Functional Food Center (FFC) has established an operational definition emphasizing bioactive compounds, validated health benefits, and evidence-based dosing, along with a comprehensive 17-step product development framework that guides the translation from mechanistic discovery through clinical validation to market recognition. This theoretical article presents the FFC’s definition in comparison with major international regulatory perspectives, including the U.S. Food and Drug Administration (FDA), Foods for Specified Health Uses (FOSHU), and the European Food Safety Authority (EFSA). It details a four-phase, 17-step framework spanning preclinical studies, clinical evaluation, and classification or recognition, while providing practical guidance for researchers and developers seeking to align their work with this structured approach. By mapping research activities to specific steps in the framework, investigators can identify knowledge gaps, design appropriate validation studies, and pursue regulatory recognition through evidence-based pathways. Adoption of the FFC definition and framework promotes consistency across international research efforts, facilitates publication in specialized journals, and supports translating bioactive compound science into health-promoting food products that meet regulatory standards and consumer needs.

Novelty of the Study: Despite decades of research, the functional food field still lacks a universally accepted definition and a standardized, evidence-based pathway for product development. The novelty of this article lies not in the creation of a new functional food definition or a new 17-step framework, but in the structured explanation and practical application of the previously established FFC definition and framework for researchers, developers, and regulatory comparison.

        This article addresses these gaps by presenting a refined functional food definition grounded in the FFC framework, alongside a comprehensive 17-step product development framework that bridges concept ideation to post-market monitoring. Unlike previously proposed models, this framework uniquely integrates clinical and epidemiological substantiation, evidence-based grading, peer-reviewed accreditation, and after-market safety evaluation. Consequently, it offers the functional food science community a practical and scientifically rigorous standard for developing, classifying, and regulating functional food products with greater consistency and consumer confidence.

Keywords: functional food; bioactive compounds; 17-step framework; Functional Food Center; product development; regulatory recognition; clinical validation; health benefits