Lukewarm empty stomach water

In the morning, I put hot water into a bottle of mineral water.

I am putting in cold water and drinking it lukewarm.

It seems much more comfortable in terms of speed.

Lukewarm water = Drinking water immediately after waking up replenishes the hydration that was interrupted during sleep and activates metabolism. In particular, lukewarm water, which is at a temperature similar to body temperature, is absorbed into the body without burden. A glass of lukewarm water in the morning promotes lymph and blood circulation, helping to eliminate waste products and stimulate bowel movements. Lukewarm water lowers blood viscosity, facilitating smooth blood flow. However, drinking a lot of cold water can cause indigestion, abdominal pain, and headaches. Cold water constricts blood vessels, which can put strain on the heart. Drinking cold water can lower body temperature and weaken immunity, making one more susceptible to various illnesses. When drinking cold water, the temporary contraction and subsequent relaxation of brain blood vessels can cause headaches. Especially for the elderly with poor circulation, heart disease patients, and those with hypertension, caution should be exercised when consuming cold water.