Water balance refers to the equilibrium between water intake and water loss in the body. Synonyms for water balance include hydration, fluid balance, water homeostasis, and water equilibrium. Maintaining proper water balance is critical for many bodily functions, including regulating body temperature, transporting nutrients, and flushing waste. An imbalance in water intake and loss can lead to dehydration or overhydration, which can have serious health consequences. It is essential to consume enough water throughout the day and replenish fluids lost through sweating, urination, and other bodily functions to maintain a healthy water balance.