So, to me, this seems not a problem (in the luggage compartment not hand luggage), but.
A) It's a powder
B) It's not factory sealed
I've looked at many threads on other sites and it seems to be fine with others (mainly in the UK), but I don't want to take my £35 tub of Protein and then find out it's been confiscated when I land etc.
I'm leaving from Terminal 5 and going to Cairo - The tub won't be coming back.
TIA