Good ol' H²O

Few people realize the importance of drinking water and it's direct effect on your health. Drinking six to eight glasses of water or juice a day can dramatically increase the efficiency of your digestion and metabolic functions.
Many people, upon hearing this, think, "Six to eight glasses?! Yeah, right! I can't do that!" and don't give it a second thought. But you can start with just a few, and, after you're comfortable with doing it frequently, boost your liquid intake. The more, the better, with the optimal point at about 8 glasses a day.
Water, making up approximately 60% of your body weight, is more important than any other nutrient. Throughout the day, water is used for many basic functions. If the body runs into a shortage of water, it can cause dehydration or exhaustion. Drinking water also helps for these additional reasons:

• When you drink water during the day, you curb your appetite and are less likely to overeat at meals.
• When your body is dehydrated and you need water, you usually feel tired or hungry. However, the normal reactionary response of eating snacks or other foods does nothing to help the root problem.
• Muscular content: only 25% of excess fat is made up of water, compared to 75% of muscle. Drinking plenty of water helps the effectiveness of exercise.
• When you drink plenty of water or juice, it flushes the impurities out of your system, so your internal workings have freedom to operate more effectively without being bogged down with unnecessary baggage.