After a long, stressful day, your body may be tired while your mind is still wide awake. One reason can be an evening stress response involving cortisol, a hormone that naturally follows a daily rhythm and is generally higher around waking and lower toward bedtime. While no drink can magically “flush out” or switch off cortisol, choosing a calming, caffeine-free beverage can become part of a relaxing bedtime routine. Some drinks also have limited research suggesting they may