“Vitamin Water” is simply expensive water, sugar (usually in the form of High Fructose Corn Syrup) coloring, artificial “vitamin” isolates (not the whole complex as would be available in real raw food) and  flavoring.  Synthetic chemicals are not food, but they are cheap.
Synthetic vitamins are made in a laboratory setting from coal tar [...]

The body processes the fructose in high fructose corn syrup differently than it does old-fashioned cane or beet sugar, which in turn alters the way metabolic-regulating hormones function.
Fructose  bypasses the digestive process that breaks down other forms of sugar. It arrives intact in the liver where it causes  the following reactions:
When fructose [...]

Research and Investigation from Environmental Health indicates that mercury is present in HFCS:
Mercury chlor-alkali products are used to produce thousands of products including food ingredients such as citric acid, sodium benzoate, and high fructose corn syrup. High fructose corn syrup is used in food products to enhance shelf life and because it is a cheap [...]

A four-year study in which researchers followed the soda-drinking habits of more than 6,000 subjects showed that those who drank one or more sodas each day were nearly 45 percent more likely to develop obesity, increased waist circumference, impaired fasting glucose, higher blood pressure, high triglycerides, and higher LDL cholesterol.  Results were the same for [...]

ScienceDaily (Aug. 23, 2007) — Researchers have found new evidence that soft drinks sweetened with high-fructose corn syrup (HFCS) may contribute to the development of diabetes, particularly in children. In a laboratory study of commonly consumed carbonated beverages, the scientists found that drinks containing the syrup had high levels of reactive compounds that have been [...]

Researchers from Loyola University Health System say they’ve found out that women who drink at least two cans of soda pop a day are nearly twice as likely to show early signs of kidney disease as those who don’t drink that many sodas.
A study by other scientists, recently published in the journal Environmental Health, found [...]

HFCS is a synthetically refined sugar.  It is a chemical made in a laboratory, it is not natural nor is it found in nature.  You cannot go out into a corn field and grab an ear of corn and somehow squeeze or extract some High Fructose Corn Syrup from it
Levulose is natural sugar from fruits.  [...]