This research paper investigates the role of biophilic interior design in enhancing psychological and physiological well-being within indoor environments. As urbanization and technology-driven lifestyles increasingly confine individuals indoors, concerns about mental health, stress, and productivity have intensified. By examining peer-reviewed studies and empirical research, this paper evaluates the impact of natural light and indoor plants on emotional stability, cognitive performance, workplace efficiency, and overall satisfaction. The findings highlight the importance of integrating natural elements, such as daylight and greenery, into interior spaces to improve well-being. Despite challenges like installation costs and contextual adaptability, nature-integrated interiors offer significant benefits beyond aesthetics. The study advocates for a holistic approach to biophilic design, emphasizing interdisciplinary collaboration and real-world applications to optimize human health, productivity, and long-term well-being.