Abstract Behavior change campaigns are crucial in combatting illegal wildlife trade (IWT) by reducing demand. but assessing their impact requires robust strategies. The Behavior‐Centered Theory of Change (BC‐ToC) integrates Theory of Change frameworks with decision‐making models to design and evaluate interventions using behavioral and progress indicators. We used BC‐ToC to design two... https://parisnaturalfoodes.shop/product-category/niacin/