You might hear people say, “Distilled water will leach minerals from your body!” That’s a myth for everyday drinkers. While you shouldn’t drink it exclusively for years, having a glass now and then is totally harmless. Still water is the better daily choice for taste and mineral balance.
But honestly, the biggest risk is accidentally using distilled water in your espresso machine and wondering why your cappuccino is bland. Don’t be that person! Keep a bottle of still water for drinking and cooking, and a jug of distilled water for your gear.