**Goal:** The goal of this project is to understand consumers attitudes towards animal suffering in the production of animal-based products. **Research questions:** Are consumers aware of the animal suffering in the current animal farming/husbandry practices? Are consumers willing to reduce or halt meat-consumption because of animal suffering? Have consumers actually altered their diets (reduced meat consumption) because of animal suffering? **Inclusion/Exclusion criteria:** **Inclusion Criteria:** ·Types of studies: Peer reviewed published articles in English. ·Population: + 18 human subjects / animal-based products consumers from the Western territories. ·Intervention: Are eligible all studies where human subjects are provided with any type of explicit mention (through physical access, videos, conceptual descriptions) to animal farming practices, animals used for food physiological characteristics or their living conditions. Interventions must include one or more types of land animal farming practices (e.g. castrations, transportation, slaughter, debeaking, tail docking, chick culling, fertilization methods, etc.); animal physiological health and / or behavior (e.g. diseases, distress, behavioral constraints, etc.), and / or environmental conditions they are subject (e.g. tethering, confining, intensive farming, etc.). Are eligible studies where participants can evaluate animals’ biological characteristics (e.g. sentience). Are also eligible studies that only provide questions to participants with explicit mentions to any of the above (e.g.: “agreeability of piglet castration without anesthesia”). · Comparison: Are eligible studies that include a minimum of fifty participants from surveys or in-depth interviews. Studies can include a control group or several demographic groups. · Outcome: This systematic review will consider as outcomes the attitudes / responses / concerns of human participants to farmed animals, animal farming practices or their living conditions. All types of outcomes will be relevant for the discussion section. ·Period: Articles published between 2000 - 2022. **Exclusion Criteria:** · Reports, books, book chapters, thesis and opinion articles. · Are not eligible consumers opinions towards meat or any animal-based products established on taste preferences (i.e. if red meat, pork, or fish, in vitro meat, etc.), quality, or frequency of consumption (i.e. how many times / week a subject eats meat), or simply opinions based on product labels or packaging information. · Are not eligible studies that conduct marketing or advertising experiences with consumers about animal welfare, or about the quality of animal-based products, or that provide consumers simplistic and taken-for-granted terms like “animal friendly systems”, “biologic”, “organic”, “animals humanely slaughtered”, etc. · Are not eligible studies measure public willingness to pay more for animal-friendly products without presenting during the study any specific farming practice. · Not eligible for insects, fish farming or fish welfare.