Drinking a glass of water right after waking up is a habit that offers significant benefits in controlling blood pressure, according to experts.
After a long night without drinking water, the body often experiences mild dehydration. This can reduce blood volume, forcing the heart to work harder to maintain circulation. Drinking water in the morning helps improve blood flow and supports stable blood pressure, according to Harvard Health Publishing (USA).
A study published in the scientific journal Nutrients in 2025 showed that approximately 50% of adults exhibit mild signs of dehydration, and this group has poorer health indicators, including a higher risk of hemodynamic instability. This suggests that dehydration is not uncommon and can directly impact the cardiovascular system.
Drinking water in the morning helps improve blood circulation and supports stable blood pressure.
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Dr. Nieca Goldberg, a cardiologist at NYU Langone Medical Center (USA), says that even mild dehydration can alter blood volume and cause blood pressure to fluctuate. When the body is dehydrated, sodium levels increase, stimulating the release of the hormone vasopressin, which constricts blood vessels and can cause blood pressure to rise.
According to the American Heart Association, staying adequately hydrated is an important part of blood pressure management, alongside diet and exercise. Dehydration not only lowers blood pressure but can also cause it to rise as the body reacts by constricting blood vessels.
Experts recommend drinking about 200-300 ml of warm water right after waking up to "activate" the circulatory system. This habit helps thin the blood, reduce pressure on the blood vessel walls, and support stable blood pressure from the start of the day.
Even though it's just a small change, drinking water in the morning can have a significant impact on cardiovascular health. For those at risk of high blood pressure, this is an easy habit to adopt but has long-term value if maintained regularly.