Your hydration directly effects your metabolism. If you want to rev up your metabolism, then you should be drinking an optimal amount of water every day. Water is involved in pretty much every function in the body, so if you’re dehydrated, it’s no wonder your metabolism is going to be effected. Almost 80% of your muscle consists of water, so if you’re dehydrated, your muscles ability to burn calories slows down. If that wasn’t enough, when you’re dehydrated your body’s ability to mobilize fat as a fuel source decreases! So the bottom line, if you want to rev up your metabolism, you must must must be drinking adequate water!