I'm Indonesian weighed 54kg and 168cm tall.
My daily activity is working in my desk. When I heard that 1.5 liters water is myth, my concern is what about people in tropical country?
If I just measure requirement by pee color say if it has clear looks I'll try reduce water until it's still looking clear. This way I came up with about a liter per day (peed 6-7 times). Personally I disagree with thirst indication as it always too late.
Is there a difference among tropic kidney and cold country kidney?
EDIT: I eat raw fruits (guava, banana, orange, etc) daily and not a coffee drinker
Drink when you are thirsty. Thirst indication is not "Too late". A healthy human body does not have a faulty thirst mechanism. Water is essential, so unless you are unhealthy you're body is hardly likely to fail to tell you when it needs water.
From Fibre Menace, p 48:
"A person weighing 70kg [155 lbs] requires at least ca. 1,750 ml [59 oz] water per day. Of this amount ca. 650 ml is obtained by drinking, ca. 750 ml is the water contained in solid food, and ca. 350 ml is oxidation water."
It then notes that 1750ml is ~7.5 glasses, which is rounded up to 8 for '8 glasses a day'. And yes we technically need that amount of water, but only actually need to drink ~2.5 glasses of water. And all liquids count, even tea, soup, etc unlike the stupid 'clear liquids' only rule.
The Merck Manual of Diagnostic and Therapy is quoted as "... a daily intake of 700 to 800 ml is needed to match total water losses and remain in water balance..."
This is from both food and drink.
Your fine if your pee is clear or light yellow and if you don't feel really thirsty. Sounds like you are keeping well hydrated to me! I have lived in a tropical area for a long time and a very cold area for a long time. I drink a lot of water naturally at both places, but because I don't sweat as much in the cold, climate controlled environment I probably drink a little less and pee about the same.
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