What really happens to your body when you drink under 500 ml of water a day

Many people assume dehydration only becomes serious during illnesses or extreme heat, but the effects of low water intake begin much earlier than most realise. Drinking less than 500 ml of water in an entire day places the body under steady pressure, even if a person feels fine on the surface. Daily responsibilities, office routines and long commutes often leave people drinking far less than their body needs. Over time this creates changes in energy levels, concentration, digestion and kidney function, even in otherwise healthy adults. Understanding what happens inside the body when hydration drops this low can help people form simple habits that protect long term health without demanding major lifestyle changes. A cross sectional study in Medicine observed that adults who consumed un