This report investigates the significant role of Corporate Social Responsibility (CSR) activities in shaping consumer buying behavior within the UK cosmetic industry. The study explores the concept of CSR, its principles, theories, and dimensions, specifically within the context of cosmetic companies. It examines the CSR practices of cosmetic industries in the UK, analyzing the relationship between these activities and consumer purchasing decisions. The research employs a comprehensive methodology including literature review, research design, and data analysis to ascertain how CSR impacts consumer choices. The report aims to identify and recommend effective strategies for cosmetic companies to enhance their CSR initiatives, ultimately improving consumer engagement and boosting sales. Findings emphasize the growing importance of ethical considerations and sustainable practices in influencing consumer preferences and brand loyalty within the competitive cosmetic market.