Dehydration occurs when you don’t drink enough liquid to replace the water lost in your urine, stools, sweat, and breath. Several studies show that being dehydrated leads to lower energy levels and a decreased ability to concentrate. In fact, dehydration affects your entire body, including your sleep cycles. A study in over 26,000 Chinese and American adults associated inadequate hydration with shorter sleep times. Although caffeinated beverages like coffee and energy drinks give you a temporary boost of energy, over-reliance on them may make you more tired the next day. That’s because too much caffeine can harm sleep, which may cause fatigue.
