Send it off for testing in an labelled vial with Chilton written on it, and post it's when you have the results, mistakes happen but as others have said test RAWS are stupidly cheap probably the cheapest, only other thing I can think is how he's stopped posting replies is he could be drop shipping goods and the supplier has sent him under dosed gear, ukm has tablets from 4 different labs and they all have been done with the same pill press, I've seen this happen over the years normally before a lab dose a cash grab and run, but this could all just be a huge mistake so take my comments with a pinch of salt please!
Oh and post your blood test results please