Juice Delivery
SPECULATIVE
Urine and blood analysis tests don't look hard enough.
Someone was saying that a caveolae pumping system is a method that essentially uses blood plasma as a transport or carrier for medicine to get into the "nooks and crannies."
The medicine's form, actually very small molecules, smaller than blood cells. It hitchhikes and is absorbed as blood delivers and deposits oxygen to your body. This method of medicine delivery is very "sneaky" and can fool conventional tests meant to detect foreign substances.