Drinking a glass of water after waking up is a simple habit that can help you start the day hydrated. During the night, you go several hours without drinking, while your body continues to lose small amounts of water through breathing and other normal processes. Replacing those fluids in the morning can be a sensible part of a healthy daily routine.
However, claims that drinking water on an empty stomach can dissolve cholesterol plaques, unclog arteries, or immediately prevent a heart attack are not supported by medical evidence. Water is essential for normal body function, but it is not a treatment for blocked coronary arteries.
When you drink water after waking, it contributes to your body’s overall fluid balance. Adequate hydration supports normal circulation, temperature regulation, digestion, kidney function, and many other processes.
Water can also be helpful for digestion. Drinking fluids throughout the day contributes to normal stool consistency and may help prevent constipation, particularly when combined with enough dietary fiber and regular physical activity.
Some people find that drinking water before breakfast helps them feel refreshed and may temporarily reduce feelings of hunger. However, water is not a weight-loss treatment by itself. Sustainable weight management depends on overall eating patterns, physical activity, sleep, and other lifestyle factors.
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