Popular brands that sell alkaline water include Aquafina, Dasani, Perrier, Fiji and Evian. One of the most alkaline waters on the market is made by Essentia, which has a pH of 9.26.
Alkaline water is less acidic and contains higher levels of calcium, potassium and magnesium, among other compounds. It is believed that alkaline water contributes to neutralizing and lowering the level of acid in the body's bloodstream, leading to better heart health, but this theory has been called into question over the years. Brands that make highly alkaline water include Evamor and Kangen; Alive Wellness Water and Vital Lifestyle Water are more acidic.