I worked at one of these places in college. Everybody had layers and layers of processes to make sure the shipment of controlled substances weren't tampered with. Because like you said the shipping companies were mostly immune to consequences from that. They'd wash their hands of the bad actors and move on. But it was seen was our fault if it happened and we didn't find it. Because of course we could be in on it and our not finding it could be part of the ploy!
replyIn one a Fedex driver and conspirators would repackage a large shipment of painkillers. They'd take a single bottle from the a few boxes on each pallet and seal them back up in such a way that was very hard to spot.
Another time they'd take like 10% of the pills out of a bunch of bottles.
Many times the driver would get lunch and the truck would be stolen. Like once a year.
I used to think this until I read that "supplements" contain real sildenafil.
replyI've heard that the main reason they can be dangerous is because they can contain way too much.
replySupplements are pretty much unregulated, and can have some fairly scary ingredients. The regulators generally don't mess with them, until someone (usually multiple someones) has a problem.
replyLots of dodgy nutritional supplements out there. Look for NSF Certified Safe for Sport products to be sure of what you're putting in your body.
replyhttps://www.nsf.org/knowledge-library/importance-nsf-certifi...
And buy direct from the manufacturer. If you order through a reseller like Amazon then there's always a risk of getting counterfeit products if someone tampered with the supply chain.