<p>When an afternoon slump makes it hard to keep your eyes open, coffee can feel like the fastest answer. Yet being tired but not sleepy at night can be frustrating too. Rather than asking whether you can never drink coffee, first notice whether the last cup is landing too close to bedtime.</p><p style="margin:20px 0;"><img src="https://qfile.hnrjkfapp.com/images/caloriecoach/uploads/1476ae15-ca48-4e35-910c-1ebf037403c8.png" alt="Tea, book, and lamp in a quiet bedroom" style="display:block;width:100%;height:auto;border-radius:14px;" /></p><h2>Caffeine is different for everyone</h2><p>NHLBI includes avoiding caffeine close to sleep as part of sleep-supporting habits. For some people, an afternoon cup is fine; for others, coffee, strong tea, energy drinks, or chocolate may make falling asleep harder. It is not a moral issue—just a clue to observe your own response.</p><h2>Run a gentle experiment</h2><ul><li>For a few days, note your last caffeinated drink and your bedtime.</li><li>Move that last drink a little earlier and notice whether falling asleep feels different.</li><li>When you need an afternoon lift, also try a few steps, daylight, or a normal nourishing meal.</li></ul><h2>Do not white-knuckle fatigue through fasting</h2><p>If you are severely short on sleep, dizzy, or clearly unwell, you do not need to ignore recovery needs for a fasting window. Ongoing insomnia, excessive daytime sleepiness, or needing caffeine to function day to day are worth discussing with a clinician.</p><h2>Sources</h2><ul><li><a href="https://www.nhlbi.nih.gov/health/heart-healthy-living/sleep">NHLBI: Sleep</a></li></ul><p>Would moving today’s last caffeinated drink a little earlier feel doable?</p>