Originally Posted by
oldone
1) Never, ever on one of my flights the steaks have been served overcooked!!
2) Protein powder it is perfectly ok to carry as I buy myself whenever in the USA without problems, just do not use it before/during a flight as some of them powders in a confined space are more antisocial than others

Why would there be a need to use it during a flight?
(that being said, it's not as if inflight meals are plentiful in protein.)