pH 7 is the holy grail: neutral. That’s pure water. It’s not an acid, it’s not a base. It’s Switzerland. But here’s the catch: pure water is incredibly rare. Even a tiny bit of carbon dioxide from the air dissolves into rainwater, making it slightly acidic (pH ~5.6). That’s normal. It’s only when we burn fossil fuels and create sulfuric acid that rain turns into a face-melting pH of 4 or lower.
And your blood? Your body fights like a berserker to keep it at exactly pH 7.4. If it swings even a few tenths either way, you stop working. That’s why drinking too much baking soda water can kill you. Yes, people actually do that for heartburn. Pro tip: don’t.
