👉 Rehydration refers to the process of replenishing fluids and electrolytes in the body, particularly during dehydration or when a person is dehydrated. This can include water loss from sweat, urine, and other sources. The body's natural mechanisms for rehydrating are primarily through the kidneys, which secrete bicarbonate ions into the blood. However, when there is a lack of fluid intake, this process becomes more difficult to maintain. Rehydration may involve taking in fluids or electrolyte supplements that