Hydration & Detox

The 8-glasses rule is too rigid — needs vary with body size, activity, climate, and diet. A reasonable guide: enough that your urine stays light yellow. In hot Indian summers, active people, and those doing physical labour may need 3-4 litres or more. Sedentary indoor workers in cooler months may need less. Thirst is a decent guide for most healthy adults.

No — this common Indian belief isn't supported by evidence. Water during meals doesn't 'dilute stomach acid' meaningfully or slow digestion. Drink water when thirsty, including at meals. What can matter: very cold water is uncomfortable for some people; sipping small amounts throughout the meal usually feels better than large volumes at once.

For heavy sweating over an hour or so (heavy workouts, long runs, hot outdoor work), yes — they replace lost sodium and provide quick fuel. For everyday hydration, they're mostly unnecessary sugar. Coconut water is a decent natural option. Regular ORS is far cheaper and effective for illness-related dehydration. Everyday hydration for a desk-based adult needs water, not colourful bottles.

Dark yellow urine, dry mouth, headache, fatigue, dizziness (especially on standing), reduced urine output, and — in severe cases — confusion. Older adults and young children are most vulnerable and their thirst signals are less reliable. During illness with fever, vomiting, or diarrhoea, watch hydration carefully — dehydration is a common reason for hospitalisation.

Yes, but it's rare in normal conditions. Drinking massive amounts of water in a short time can dilute blood sodium (hyponatraemia), causing headaches, nausea, confusion, and — in extreme cases — seizures. This mostly happens in endurance athletes overhydrating or people with certain medical conditions. For most people, drinking to thirst is safe.