How much is that really? 8 cups of water or ½ a gallon. This is the minimum recommendation.
Water makes up about 60% of our weight and 65-90% by mass of most human cells are water.
Unlike fat, water cannot be stored and thus needs to replenished-through adequate hydration. This is precisely why drinking at least 64 oz or 8 glasses of water/day is a healthy habit.
Water is especially crucial during weight loss because it helps remove toxins and other unhealthy substances stored in your fat cells. By staying well hydrated, your organs and systems can function properly.