If you plan to fly for the holidays, you may want to rethink what you eat and drink. As tempting as it is to toss a bag of chips or pretzels into your carry-on, salty foods are the worst. Dry air in the cabin makes it easy to become get dehydrated on planes, therefore a meal or snack that’s high in sodium can make it worse. Soda and other carbonated beverages may seem refreshing but can expand inside your GI tract making the feeling even more unpleasant. Another one that you might want to pass on is alcohol. It effects the body differently in the air than on the ground, you might get tipsy faster. Both coffee and alcohol have diuretic effect on the body and can lead to more trips to the bathroom. The best things for your flight are water, fruit, and lean protein.