QUOTE (Adelle @ Jan 29 2008, 08:17 AM)

Thanks!! I think I'll have DH call the airline before we go. The worst they can say is no!! I was planning on bringing a TON of granola bars. They are DELICIOUS and they travel well.
It's good to know that I can bring food onto the plane! I'm not sure what I'll bring, but something I'm sure!! Thanks for the advice!
I wouldn't rely on what you can take through security ... people are talking here about AFTER security...
My experiences are quite varied... it seems to depend n the airport, mood of staff ... you name it along with constantly changing rules.
A doctors note is always useful, you can always balance the blood sugar with fruit juice .. but are you really going to slip into a coma in 5 hours? I always just plan on not eating on flights out ... its not worth ruining the vacation from day 1... if I can get stuff onto the plane its a bonus, if I can buy something on the plane another bonus ... there is always something you can find to eat... last flight I ended up eating the little butter packets straight from the packet ... the sugar packets etc. and found the peanuts in the duty free were gluten-free. Unfortunately you have to buy them first to check the packets if you fly some budget airline like continental,.
Most people can quite easily not eat for 72 hours so even with blood sugar issues you should be able to manage 7-8. (which gives you time in check-in and stuff) .. think about it you do it every night??? Make sure you eat well before security ... I usually stuff myself .... then anything you get through is a bonus.... If I get really stressed about food I usually take sleeping pills (I have a understanding doctor) .. but this is really only for 12hr+ flights...
For dehydration you can always ask for water .... usually they will give it you a glass at once then if you're in cattle class ignore requests for more with that stare to the far end of the cabin... TIP ... take some sort of tablets, (they might just be vit C) ... but tell them you need WATER to take medication and you get it REALLY QUICK ...

alternatively you can take an EMPTY plastic bottle or buy a bottle post security ..then ask them to refill the bottle.... again any complaints just tell them its for medication!
This being said, you might find some gluten-free stuff post security ... etc. etc. plan on not eating and then take anything you find as a bonus .... but last thing to do IMHO is take risks on being sick your whole vacation.