The "healthiest" bottled water is generally considered to be natural spring or artesian water that is high in essential minerals like magnesium, calcium, and potassium, while maintaining a neutral or slightly alkaline pH. Brands like Evian and Volvic are sourced from protected underground springs and contain naturally occurring electrolytes without added chemicals. Fiji Water is another popular choice, as it is drawn from an artesian aquifer and is known for its high silica content, which is beneficial for skin and hair health. If you are looking for alkalinity, brands like Essentia use a process of ionization to achieve a pH of 9.5, which some believe helps neutralize acidity in the body, though scientific consensus on the benefits of alkaline water is mixed. It is important to distinguish these from "purified" waters like Dasani or Aquafina, which are essentially municipal tap water that has been filtered and had minerals added back for taste. To ensure the healthiest choice, look for water bottled in BPA-free plastic or glass to avoid chemical leaching, and check the label for a "TDS" (Total Dissolved Solids) count, which indicates the level of mineral content.