With all the hormones and whatnot inside. Dopamine, adrenaline, melatonin, whatever. Also, there’s this Hunter S. Thompson bit on the… pineal gland?
If it had an effect on you, wouldn’t it be a really messed up high, all over the place? With uppers, downers etc mixed? (Not including the emotional implications of eating raw human brains.)
It would still go through the liver for metabolism. The only thing “boofing” effectively does is skip the stomach part of the digestive process. To take up anything from the digestive tract, it gets transported through the intestinal lumen and into the mesenteric and hepatic portal system. The liver filters everything that gets into the blood from the gut before it goes into the inferior vena cava and into the rest of the circulatory system.
Correction to clarify: the lower gut/colon mostly only takes up water and certain vitamins that are released by gut bacteria, and very small molecules like ethanol can sometimes get through as well. The very lowest part of the colon does have a vascular supply that can bypass the liver, and there are some medications designed to take advantage of the select receptors and transporters down there. However, neurotransmitters and peptide hormones (which is what OP was asking about) would likely not get taken up until it was much higher up in the digestive tract, and at that point it would go through the hepatic portal system.
Thank you to those that corrected me. Intestines are actually fairly complicated.
I don’t think that’s correct.
Does rectal have first-pass effect? In general, drug absorption in the upper part of the rectum is transported to the liver via the portal system and thus undergoes first-pass metabolism, whereas drug absorption in the lower rectum is transported directly to the systemic circulation
The lower colon really only transports water and a couple of vitamins released by gut biota, so if they’re getting far enough in that more complex molecules would be taken up, that would probably be up into the hepatic portal system.
The reason “boofing” works for alcohol is because ethanol is actually a rather small molecule, all things considered.
