Hydration levels refer to the amount of water present in the body, which is essential for maintaining overall health. Proper hydration supports various bodily functions, including temperature regulation, nutrient transport, and waste elimination. Dehydration occurs when the body loses more fluids than it takes in, leading to symptoms like thirst, dry mouth, and fatigue. Monitoring hydration levels can be done through various methods, such as checking urine color or using hydration tracking apps. Staying adequately hydrated is particularly important during physical activities or in hot weather, as exercise and heat can increase fluid loss.