How this is worked out, and its limits
ICMR-NIN 2024 suggests about 8 glasses (2 litres) a day including beverages, more in heat and with activity. The base here is 33 ml per kg, kept between 1.8 and 3 litres; heat and exercise each add 500 ml, pregnancy 300 ml and breastfeeding 700 ml (EFSA 2010).
References: ICMR-NIN 2024, Dietary Guidelines for Indians
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