The effects of flying on the body list is quite big, the most common i've found;
-ALWAYS feeling tired, no matter how much sleep you get and your normal sleeping patterns go out the window
-Bloating and much worse cellulite than I had before flying
-ALWAYS getting colds or some kind of sickness
-Stinky feet (haha I think it's wearing stockings for such long periods)
-Dehidration (I find it REALLY hard to drink enough water) and then if you do drink enough, always running to the loo
-On days off, the desire to just hide away from people and public places
-Also during new conditions negotiations SERIOUS stress/resentment/ anger lol but thats another story
all in all though I still love my job and despite the list of effects, all jobs to some degree effect the body in one negative way or another and flight attending is no different