It’s natural to face a little energy slump in midafternoon. But don’t be tempted to turn to full-caff coffee or tea to up your energy. You’ll want to cut out caffeine at this point in the day or it might interfere with sleep, said Janel Funk, a registered dietitian based in Boston.
Even if you're convinced your late-day caffeine fix isn't getting in the way of sleep, try cutting it out earlier. “Some clients tell me they can drink coffee until 10 p.m. and fall right to sleep,” said Funk. “My response is: Just because you can doesn’t mean you should. Similar to alcohol, it can affect our deep sleep and our quality of sleep.”
Instead, sip on naturally caffeine-free herbal tea, or switch to decaf tea or coffee.