Here are a few of the many ways drinking water helps your health and beauty:
Makes you feel awake and alive
You know that dehydration is when you aren’t getting enough water, and that when you’re dehydrated, your body can’t perform its everyday functions. But did you know that even mild dehydration is responsible for making you feel tired and drained? 
Helps your skin and complexion
Water will plump your skin, filling in those fine lines, and will help with that great complexion.  When your body is dehydrated, it will pump water first to those vital organs, like your brain (which is 90% water). Skin is more of a peripheral organ, so your body will cut off its water supply if you’re low. 
Flushes toxins away from organs
This is why we tell you to drink water after massage! We’ve been working out extra toxins from your tissues, so now you need to wash them away!
Improves circulation and blood flow
Massage also increases circulation and blood flow, so, again, follow and precede your massage with lots of water!
Helps fight illness
Water is an essential piece of your immune system, including the circulation of white blood cells. 
Improve athletic performance
Water is 75% of your muscle makeup. Drinking water will help keep your muscles healthy. You may also experience fewer cramps and sprains if you keep your muscles and joints lubricated. Water even helps regulate your body temperature, which can help you feel more energetic during your workout. 
How much do you need?
The Mayo Clinic recommends drinking at least eight 8-ounce glasses of fluid a day. And the Institute of Medicine recommends 13 for men and 9 for women! All fluids counts toward your water intake, and milk and juice are composed mostly of water. (Water is still the best fluid!) You can also eat foods like fruits and vegetables that contain lots of water (watermelon and cucumber are 90% water!). 
References http://www.mayoclinic.com/health/water/NU00283  http://www.lhj.com/health/news/13-surprising-benefits-of-water  http://appreciatewater.org/4-amazing-benefits-of-drinking-water-Clear-Skin/  http://www.fitday.com/fitness-articles/nutrition/healthy-eating/5-immune-system-benefits-of-drinking-water.html  http://www.mangosteen-natural-remedies.com/benefits-of-drinking-water.html