edit: ^ LOL nice one, intraocular acetone.
When we digest food does it go to the brain? Is that why eating THC works?
while i risk going off topic on an already dead thread, i gotta answer this recent question.
the body's metabolism of fats is what exposes eaten THC to the blood and brain. the brain gets its food from the blood, so the only way your body can feed your brain is via the blood.
shorter chain fats (milkfat, coconut fat) are metabolized directly by the liver into energy, so they allow THC to enter the bloodstream within 30 minutes of ingestion. this is why 100% real cow-milk butter is the #1 choice for oral THC, as it is primarily short-chain fats that are fast-acting.
longer chain fats (anything omega-X, most vegetable oils and animal fats), are metabolized via a different pathway, so anything dissolved in these can be very variable in speed of onset, peak intensity, and overall duration. i believe marinol is THC in sesame oil, so this could be why most stories i've read about marinol have been negative.
bottom line-- use real milk butter to cook your weed, and your brownies will be just fine.
for anyone who stumbles on this thread and think that there are still people trying to inject thc... just don't bother