Among all methods of cannabis oil extraction below , which one is the most efficient? 1) Solvent extraction (using ethanol); 2) Carrier oil extraction (using olive oil); 3) Super- or sub-critical carbon dioxide extraction; and 4) Light hydrocarbon extraction.

Andy Joseph
Andy Joseph  replied:

Thanks for the question!  This is a pretty common question with a fairly complicated answer, so check out this related question on the Cannabis ECN: