Eating on the plane is a complicated issue. The high altitude and the atmosphere in the plane often make eating a big task for many. And due to all these, it is important to filter out what to eat and what not to eat while inside the plane.
One thing you should always avoid is alcohol. Due to the reduced pressure in flight, there will be an extra added pressure on one’s body systems. This makes alcohol have more impact than it does in usual situations. But the worst part is dehydration.
Alcohol can dehydrate your cells and this is one of the reasons why one can feel tired after a long flight. The best liquid to drink during flights would be water.