Dual-Engine Human Evolution: A Testable Framework Linking Carnivorous Energetics, Starch Driven Metabolic Plasticity, and Episodic Psychoplastogens

This record contains the full supplementary materials for the study Dual-Engine Human Evolution: A Testable Framework Linking Carnivorous Energetics, Starch Driven Metabolic Plasticity, and Episodic Psychoplastogens. These materials support the conceptual model, empirical pilot, and analytical program described in the manuscript. They provide extended methods, data inventories, coding schemes, statistical specifications, and reproducibility resources for all components of the project. The supplementary materials include detailed documentation for comparative genomics, transcriptomics, neuroimaging, microbiome and SCFA assays, archaeological and ethnobotanical synthesis, and agent based modelling. They also contain pre registration documents, ethics and governance templates, and a complete description of the code repository structure used for all analyses. All content is written in UK and Australian English and follows open science practices, including transparent methods, containerised computational environments, and clear decision rules for interpretation. These materials are intended to ensure full reproducibility of the study and to support future extensions of the Dual-Engine framework.