Quitting coffee can trigger withdrawal symptoms such as headaches, irritability, and fatigue, typically starting within 12-24 hours after the last caffeine intake. According to Dr. Praveen Gupta, Chairman of the Marengo Asia International Institute of Neuro & Spine in Gurugram, symptoms peak between 20-51 hours and may include nausea and muscle aches. While some individuals report improved sleep and mood stabilization by days 3-7, most cognitive issues tend to resolve within the first week. Experts like Meenakshi Aggarwal, Clinical Dietitian at Marengo Asia Hospitals, note that while energy levels may stabilize after 30 days, this outcome is not consistent across all individuals. They caution against rigid timelines for caffeine withdrawal, emphasizing that individual experiences can vary significantly and that many claims circulating online lack robust scientific backing.