I'm wondering if perhaps some people don't have the enzymes or digestive gear to absorb cannabis. Because there are enough reports of eating cannabis without cooking or heating to be certain it is possible, but others will argue just as surely against it based on their own personal experiences. It's not terribly unlikely that just like some people can't tolerate dairy, or honey, or what have you, similarly they can't assimilate eaten cannabis, or possibly they metabolize it too slow to have much effect.
I think troll, that if you look honestly at the asthma issue, you will find most people don't have a problem with asthma and smoking pot.....as long as they have an inhaler handy!
Here's a link on a discussion...of course a lab can say whatever it wants, but the real world is where it counts, and this simple discussion on a forum demonstrates that smoking pot can be pretty detrimental to asthmatics, even the ones who say they don't have a problem, only think that because they view having an inhaler as normal, which it is very much not!
http://www.steadyhealth.com/smoking_weed_and_having_asthma_is_bad__t96757.htmlDorothy, the problem with slow grinding is that cannabis resins are not oils as we think of them, they are extremely sticky glue like substances, literally resins, more akin to pine tree sap than oil. They can be made in to liquidy oils with harsh chemical processes like butane extraction, but that renders them, IMHO absolutely unfit for human consumption.
Hashish/kif/bubblehash is about the best you can do healthwise, and that is active orally in sufficient quantities.
I suppose you could splice two methods by extracting in to pure alcohol, then evaporating the alcohol off (ethanol, NOT isopropyl which is far less effective in consumer concentrations), then put the residue in to a carrier oil like stone pressed olive oil.
Still, as long as you're not smoking it, even if baked in to food, it is relatively harmless. When I consider the amount of cooked food I consume, the amount I can tolerate without getting sick or exhibiting noticeable symptoms, I do believe I could eat cooked cannabis on a regular enough basis to suit the needs of the medicinal aspects without too many negative health effects. Like troll says, there are people who live to 100 who smoke every day, or my grandpa who lived to 95, eating bacon and a bunch of other SAD crap every day. The only thing I would mention is that these people definitely have a lower quality of health at this age than they would if they were living more healthfully, they may be alive, but in many cases they are barely functional and not self sufficient.