2 You become dehydrated.
Thanks to an airplane’s low humidity levels, a man can lose up to 8.5 cups of water and a woman can lose up to 6.8 cups of water on the average 10-hour flight, according to physiologist Yasmin Badiani. Dehydration can lead to bloating, constipation, and serious headaches, so drink up. For best results, buy all-natural spring water before your flight. Many in-flight water bottles, like Dasani, contain trace amounts of sodium that will only leave you feeling thirstier.
