perfect success topic (congrats to subjects :-), though the shot itself would be better if you could avoid large uninspiring tshirt in much of the picture and also the light cast (partly brownish, partly greenish)- good luck anyway
Nice idea ... If this is set-up, there seem to be too many distractions. The label in the hand seems like you're spoon-feeding the viewer something that could be figured out with just the test thingy. Congrats if this is real :)