A study published in The Journal of Human Nutrition and Dietetics (Vol 29, Issue 5) shows that drinking plain tap water is healthier than consuming other beverages and can decrease one’s calorie intake by 68-205 calories per day, resulting in weight loss and preventing obesity.
Prevention of hormonal disruption
Atrazine is a herbicide detected in the unfiltered tap water of nearly 30 million American homes. Studies show that pregnant women who drink water contaminated with atrazine run a higher risk of having premature and low birth-weight babies.
Reduced risk of drinking demineralized water
Adequate magnesium levels in the water decrease the risks of cardiovascular diseases, especially for sudden death. Low magnesium levels are associated with a higher risk of motor neuron disease and pregnancy disorders (preeclampsia).
Reduced fluoride exposure
It is a popular belief that adding fluoride to municipal water helps the prevention of cavities. However, a Harvard study shows that there is no evidence for this belief, but fluoride potentially alters bone structure, weakens the skeleton, and is toxic to brain cells.
Reduced exposure to cancer-causing contaminants
Filtered tap water contains decreased levels of chemicals such as arsenic, radon and uranium, fertilizers, pesticides and chloride, which are all carcinogenic substances. Continual exposure to these compounds has been associated with different types of cancer.
Reduced risk of gastrointestinal diseases
Drinking filtered water decreases the risk of gastrointestinal diseases caused by viruses, bacteria, and protozoa that even chloride-treated water might contain. More susceptible people are pregnant women, children, and individuals with impaired immune systems.