Three litres of water a day won't guarantee glowing skin, says dermatologist

An online trend claims drinking three litres of water daily guarantees glowing skin, but dermatologist Dr Swetha Sridhar calls it a misconception. Adequate water supports normal skin function, and dehydration can make skin look dull, dry or more lined. Studies suggest extra water may modestly improve skin hydration in people who drank too little, but no fixed intake promises radiant skin.