リュウジさんが「これしか買わない」と絶賛した“炭酸水”「めちゃくちゃ美味しい」 (Sirabee)

Coffee, for example, has a pH of around 4. Soda is a 2.

Water with a bit of sea salt is fine—no need for sugary sports drinks.

QuintEssential Hypertonic Elixir, which tastes more or less like seawater but works fantastically. You can also include up to 1500 mg of any vitamin C supplement with this water.