Have you ever experienced the effects of flying? The dehydration, strong emotions, achy joints and lack of clarity? There are few human inventions greater than the advent of air travel, but the truth is that human bodies weren’t made to fly. Being sealed in a metal tube 30,000 feet above the ground has physical effects (like dehydration) but also has some serious ramifications when it comes to your mood. Blame the cramped space or the radiation our bodies are absorbing, but there’s no denying that flying takes its toll every time we board a plane. These physical and emotional effects are unnerving, and they can also lead to added stress on our immune systems. If you’re taking a flight soon and want to remain as healthy as possible, read our guide to mitigating the ways that flying can mess with your mind and body.