The environment inside an airplane is very dry and oxygen-deficient. Data indicates that after a 3-hour flight, the body loses 1 kilogram of water, and the longer the flight, the more water the body loses. Dehydration can cause cells in the body to function inefficiently, leading to fatigue. One of the reasons some people find long-haul flights so exhausting is that they do not replenish enough fluids.
Airlines typically offer a variety of complimentary beverages for passengers to take as much as they like. However, not all beverages are effective for rehydrating the body.
Dr. Ximu, a nutritionist, told reporters that the best beverage choice on a plane is natural mineral water. Because it contains oxygen, mineral water can both replenish fluids and oxygen. The second choice is green tea.
Pure fruit juice and red wine can be considered as the third option. The health benefits of red wine are widely recognized by experts. In the cabin, a man can drink one cup of the standard disposable cup, while a woman can drink half a cup. The cabin pressure is different from that at ground level, and excessive alcohol can impair a passenger's ability to react in an emergency, affecting their judgment and actions.
As a last resort, you can choose coffee. This is because caffeine is a diuretic, which accelerates the excretion of water and also causes a significant loss of absorbed nutrients.