This meta-review synthesises evidence concerning individual-level psychosocial characteristics associated with alternative protein food (APF) choices. We investigated the associations between: (i) individual-level determinants based on the COM-B model (capabilities, perceived opportunities, motivation), sociodemographic factors, and (ii) indicators of APF choices (e.g., intention to eat, buy, pay, acceptance, intake). Differences in characteristics of APF made from plants, insects, mushrooms, and other APF sources were explored. Thirteen databases were searched in this pre-registered (CRD42023388694) meta-review and 28 reviews were included. The risk of bias was assessed using the ROBIS tool. For choices, consistent support was obtained for associations with (i) capabilities, including cooking skills, exposure to/familiarity with APF; (ii) motivations, including perceived health-related, pro-environmental, and sustainability benefits, and animal welfare; (iii) younger age and higher education. For choices, consistent support was obtained for (i) capabilities, including formal knowledge about APF, exposure to/familiarity with APF; (ii) perceived opportunities, encompassing positive social and cultural norms, distrust in technology; (iii) motivations, including perceived health benefits, pro-environmental and sustainability benefits, perceived health risks, being adventurous/daring, curiosity, neophilia, disgust; (iv) male gender and younger age. Recognising differences in potential determinants across various APF sources is essential for designing interventions aimed at promoting APF uptake.

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