Did you know that the hardest water in the world is found in the Sahara Desert? Yet nomadic tribes there don’t suffer from kidney epidemics. Their secret? They drink lots of it, keeping urine diluted and minerals flushed.
Another fun bit: The ancient Romans used hard water in their aqueducts for centuries. Their kidneys were fine—though their lead pipes probably weren’t. Hard water actually protects against lead leaching from pipes because calcium creates a protective coating.
And for the science nerds: The human kidney can process up to 800 mg of calcium per day from food and water combined. A liter of hard water might give you 150 mg—well within the safe zone.
