Biophilic design is more than a trend—it’s a transformative approach to architecture and interior design that draws on humanity’s innate connection to nature. By integrating natural elements and principles into built environments, biophilic design seeks to create spaces that aren’t just aesthetically pleasing but are also beneficial to our wellbeing. In recent years, an increasing body of research has underscored the profound impact that contact with nature has on mental health, from decreasing anxiety and stress to improving focus and mood. This comprehensive guide explores the various ways in which biophilic design can enhance mental health, highlighting principles, scientific evidence, practical applications, and future opportunities.