TS i only can comment on gambir for you
Its a natural product without any banned substance inside, so if you are crossing an international border with it there is nothing to worry about
But if you are worried for privacy just tell them its your hair tonic if they ask, lol
Plus if you are flying remember there is a limit of 100ml for liquid products (from my memory)
Anyways these products they usually won't ask anything unless you are bringing in huge quantities else you have no worries at all
Have a safe and enjoyable trip TS
