This study investigates the impact of marketing on consumer purchasing decisions in the nutraceutical sector, particularly for functional foods and nutritional supplements. Through a survey, the research examines how various advertising strategies, including social media campaigns, digital marketing, celebrity endorsements, and health-related claims, influence consumer perceptions and buying behavior. The study focuses on demographic factors such as age, gender, income, and health awareness. Key findings suggest that trust in the advertised product, the credibility of the source, and the emotional appeal of health benefits play significant roles in shaping purchasing decisions. Additionally, the research highlights the growing importance of transparency and scientific evidence in nutraceutical promotions, as consumers increasingly value data-supported health claims. The study offers insights into effective advertising strategies for the nutraceutical industry to enhance consumer engagement and encourage informed purchasing decisions.