Core Viewpoint - The health benefits claimed by alkaline water lack scientific support, and its marketing exploits consumer health anxieties [2][3][4]. Group 1: Types and Composition of Alkaline Water - Alkaline water on the market is categorized into three types: artificially created with sodium bicarbonate, electrolyzed alkaline water, and naturally occurring alkaline water, with pH values ranging from 7.0 to 9.0 [1]. - Artificial alkaline water often has a distinct alkaline taste, and manufacturers may add sweeteners and flavorings, classifying it as a beverage rather than pure drinking water [1]. Group 2: Health Claims and Scientific Evidence - Claims that alkaline water can neutralize stomach acid or lower uric acid levels are misleading; significant amounts of sodium bicarbonate are required to achieve these effects, which is impractical through alkaline water consumption [2]. - Alkaline water has not been included in national drinking water standards, and its purported health benefits are largely marketing strategies without scientific validation [2][4]. Group 3: Nutritional Perspectives - The concept of "acid-base constitution" is identified as pseudoscience, with claims that alkaline water can improve health being debunked by experts [4][5]. - The human body has a sophisticated system to maintain pH balance, and dietary intake of acidic or alkaline foods does not significantly alter this balance [4][5]. Group 4: Recommendations for Drinking Water - The best choice for hydration is boiled water, which is clean, retains minerals, and is cost-effective [6]. - The recommended daily water intake is 1700 milliliters for men and 1500 milliliters for women, with a focus on drinking small amounts frequently rather than waiting until thirsty [6]. Group 5: Market Trends and Consumer Awareness - With increased scientific literacy and regulatory scrutiny, alkaline water brands are less likely to overtly claim health benefits but may still imply them to justify higher prices [7]. - Continuous public education on proper hydration and health is necessary to counteract misleading marketing practices [7].