How Many Liters of Water Should You Have a Day

How Many Liters of Water Should You Have a Day

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Here’s the gossip: coffee and tea do count. Yes, even with caffeine. Unless you’re drinking industrial-strength espresso, the fluid from your morning brew adds to your total. I have a friend who swore coffee dehydrates you until I showed him a study, and he said, “Well, that’s my lucky day.” And soda? It counts, but let’s be honest—you don’t need the sugar. It’s like counting candy as your vegetable serving; technically it’s food, but not a good idea.

Also, fruits and veggies are sneaky hydrators. A cucumber is 96% water, making it basically a salad that’s also a water balloon. Watermelon? That’s nature’s hydration hack. So if you eat a salad and a slice of melon, you might already have 200–300ml of water in your belly without touching a glass.

The “pee test” is your best friend

Forget the liters, forget the apps. Just check the toilet. If your pee is light yellow like a weak lemonade, you’re golden. If it’s dark, you’re a raisin in progress. This is the only health metric you can eyeball without a lab coat. Once you do this for a week, you’ll realize you don’t need a rule—you need a tiny bit of attention.

I used to obsess over hitting exactly 2 liters. I’d set alarms, use special bottles, and feel like a failure if I missed my “hydration goal.” Then I realized I was spending more time measuring water than actually drinking it. Now I just take a sip whenever I walk past the sink. It’s called the “lazy person’s hydration,” and it works.

So, how many liters? Don’t lose sleep over it. Start with 1.5 liters if you’re a small person or a couch potato. Go to 2.5 liters if you exercise or live in a hot place. If you’re a sweaty runner, maybe 3 liters. Your body will nudge you—trust it. And if all else fails, just remember: you’re mostly water anyway, so don’t let your inner sea run dry. Cheers, literally.

吉田 誠
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吉田 誠

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