I use powdered lethicin.
For oil carriers if you are transferring them into the oil.
MCT/Clarified Butter and avocado oil conversion rate is 90 to 95%....the best for transfer of the two
Coconut Oil/EV olive oil/ walnut and grapeseed conversion rate is 80 to 85%
Bacon Fat is 90+% and works VERY well....rough on cholesteral but tough on pain !
lol
Clarified butter is fantastic and it makes a huge difference if its clarified (STRONGER).
Butter and coconut oil are the best for baking cookies or brownies. For gummies i love coconut oil the most.
This is based on infusion of decarbed buds into oil.
Flavor wise its hard to beat coconut oil...clarified butter works good to but avacado and evoo taste like shit ! IMHO
With concentrates like rosin or hash oil after decarb you can probably mix it into the oil and get 100% transfer.
I just find it a lot easier to put the buds in the machine and push the button and smoke my rosin.