I cant comment about Tren specifically, but medically the reason you take any medication sublinqual is because it goes straight into the blood stream under tongue which is very porous and bypasses the liver completely. When cardiac patients take Nitro sublinqual for chest pain, their coronaries expand within 2-3 minutes providing relief. If it has to actually go thru the stomach-->small intestine--->liver---> blood stream it would take 20-30min at least.