Peg, I had no problems taking food on the plane whatsoever. Water bottle was empty and friendly stewardess always topped off my “drink”, hehe. Besides GF, it is about not having processed food and I stick pretty much to vegetarian/vegan now except fish a couple times a week. I did this with fruit for flights in the US too, no problem. As for the supplements, I buy a lot in the US simply because the cost is much better although I have never seen Superfoods or Green+ bars in Chile (try Vitacost, great prices). KNOP has some stuff though and I get spirulina at Planta Maestra.