A balanced diet and lifestyle are crucial during UPSC preparation as they significantly influence cognitive function and overall well-being. A proper diet ensures that aspirants receive adequate nutrients to support mental clarity and focus. Regular exercise can alleviate stress and enhance stamina, which helps during long study sessions. Additionally, maintaining a routine that includes sufficient sleep and relaxation aids in preventing burnout. By prioritizing health, aspirants can sustain their motivation and productivity, ultimately leading to more effective preparation and better performance in exams.