# Large glass of water after waking not necessary, says doctor 2026-08-25T00:43:45+00:00 | Health & Science | Indian Opinion Desk Corroboration: 1 independent outlet Drinking a big glass of water immediately after waking is unnecessary, according to Dr Vinod Xavier, consultant in internal medicine at Aster Medcity, Kochi. While a modest glass is harmless and addresses overnight dehydration, forcing down a large volume has no proven benefit, he said in an interview. Cold or warm water makes no difference to absorption, the body regulates temperature internally. Room-temperature water is simply more comfortable. Poor daytime hydration disrupts sleep through dry mouth and headaches, but drinking too much right before bed causes frequent urination and also harms sleep quality. Water before meals can mildly suppress appetite but is not a metabolic fat-burner. Plastic bottles left in hot cars pose a low risk from occasional exposure, and copper vessels are safe if clean and food-grade. For kidney stone prevention, a glass before bed reduces overnight urine concentration, but total daily fluid intake matters most. ## Indian Opinion Analysis Hydration advice is among the most commonly shared unverified health tips on Indian social media, often conflicting with basic physiology. The body's fluid balance is regulated by the kidneys and hormones, not by fixed rules about water temperature or a mandatory morning ritual. Actual daily water requirements vary widely with climate, activity, and individual health, the ICMR's 2020 dietary guidelines suggest 1.5-2 litres in temperate conditions but acknowledge higher needs in tropical heat. A practical gauge is urine colour: pale straw indicates adequate hydration, dark suggests more fluid is needed. What matters is total intake across the day, not the timing or temperature of a single glass. The next step for readers is simply to replace any rigid morning habit with a general awareness of the body's own thirst signal. ## Coverage - newindianexpress.com Framing normalises a counter-intuitive medical view without sensationalism, leading with the rejection of a popular habit rather than the habit itself. This story was synthesised by AI from the source linked above. Tags: Aster Medcity, Dr Vinod Xavier, ICMR, Kochi Canonical: https://indianopinion.org/large-glass-of-water-after-waking-not-necessary-says-doctor/ License: Summary and commentary (c) Indian Opinion, reusable with attribution. Facts belong to the linked sources. Cite: https://indianopinion.org/large-glass-of-water-after-waking-not-necessary-says-doctor/#story-in-brief Review state: restored archive article, accurate at time of publication, not offered to search indexes. How this brief was made: an AI model read the report linked above and wrote this summary and analysis, which were published automatically. Published briefs are sampled every hour by an automated quality check; the editor verifies its findings and approves corrections, and corrected briefs carry a dated correction line. We do no original reporting. Methodology: https://indianopinion.org/ai-use-policy/