How do I prevent myself from falling asleep at lunch

To stay awake after lunch, try a smaller, lower-carbohydrate meal—especially if you notice starches make you sleepy—and avoid eating until you’re overly full. Large meals can divert blood toward digestion, and carbohydrates may add to post-meal sleepiness. 1 2

The afternoon alertness dip can happen even if you skip lunch, so it isn’t necessarily caused by the meal. If you still feel sleepy, Huberman describes a brief walk followed by a 10-minute hypnosis/NSDR practice as a way he stays more alert into the afternoon; if you choose to nap instead, keep it short—around 20 minutes—or no more than 90 minutes. 3 4 5