Another thing we did was for altitude. Don't know if it is an old wives tale or not, but we always got up there two days early and ate bananas until we were sick of them. We were told the potassium in them would increase our red blood cell count and help with the altitude. Don't know if true or not, never tried not doing that. I do know either that or the altitude did have an effect on us when we came back home. Always felt very lethargic, almost sick, for about a week. More than just tired.