A balanced diet contributes to effective UPSC preparation by enhancing physical health, boosting energy levels, and improving cognitive function. Proper nutrition ensures optimal brain performance, which is crucial during intense study sessions and exams. Foods rich in omega-3 fatty acids, antioxidants, and vitamins support memory and concentration. Staying hydrated and maintaining a regular eating schedule can further help manage stress levels and sustain focus, ultimately paving the way for successful exam preparation.