Stop believing what the company tells you on the TV or in the advertisement, read the ingredients for yourself, and if you don't know how, call me and I will teach you.
What they don't tell you is often more important than what they do tell you. Ever wonder why you don't see "Milk builds better bones" on the milk bottle? Because the FTC and the FCC regulate advertising and they have a lower threshold for what you can and can't say regarding nutrient value of products, where as the FDA that regulates food products and labeling requires scientific research as proof of a heath claim. The FDA does regulate advertising of food, drugs and supplements that make claims to healing disease or known medical problems, so you can't make any statement you want but it is much more liberal than what they allow for packaging and labels.
Guess what? There has never been any conclusive research that supports the milk, calcium, and bone density relationship and to the contrary there is evidence to the opposite. The theory goes that milk is acidic in comparison to your blood and the pH balance is upset requiring the bones to leach calcium back into the blood stream to balance out the acidity. Thus creating a loss of calcium and bone density!
All those Vitamin Water drinks fall in the same category, no real proof that they do anything and more evidence that they harm you.
Drink water and green or herb teas, the rest is just belly wash!
You have to check the ingredients:
U.S. group sues Coke over VitaminWater health claims
http://www.reuters.com/article/domesticNews/idUSTRE50E54L20090115