I've heard of people using coconut oil and lecithin with decarb, but it seems to me that it would take up space in the 00 capsule that would better be utilized by more cannabis.
I know some think that it helps aid in absorption, but I haven't found any difference with oils as a carrier medium and just never got around to trying lecithin. My wife just doesn't like doing the caps, says it just doesn't hit her as hard as vaping and she doesn't want to have to "wonder if I'm high". I've heard edibles really hammer some people and a lot of normal, experienced heads get real paranoid with them. Just doesn't affect her the same way. For me, it got to be too much trouble to decarb, oil it down, strain/filter and make then make cannacookies. It's so much easier just to grind up the colas in a coffee grinder after decarbing, cap 'em up in 00 caps and take 'em QID.
Now the effect ingesting 1 pound of SouthEast Lights cannabis every 4 months has on my ECS tolerance is a story for another post.