Ok, I must apologize for the pun. Airplanes, Internet cafe keyboards, hotel rooms, and traveling in general all make you more prone to illness and you should increase your intake of antioxidants as you wander the globe.
There are many health benefits of cinnamon, not to mention a little will go a long way in you travel bag, waistline, and pocketbook. Cinnamon doesn’t have any calories (provided that you don’t get cinnamon-sugar) and you can sprinkle it on any old nutritionally bland hotel breakfast food like bagels. Also cinnamon has been shown to have an anti-clotting effect on the blood which is good to counteract the clotting effects of flying.
It also goes great on cereal, about $2 bucks worth will last for months., and it won’t spoil or go bad.