Hi Rod, thanks for your comment. Yes I agree, the lack of studies on this subject is frustrating. As to your question — are you referring to nanoemulsions on the oral vs sublingual ingestion, or just standard cannabis oil? No independent nanoemulsion studies have been carried out comparing both. However, in regards to standard cannabis oil, it appears that buccal dosing has a higher bioavailability than swallowing per this study carried out by GW Pharmaceuticals (go to the page 2, paragraph 2): http://clinchem.aaccjnls.org/content/clinchem/57/1/66.full.pdf

I hope this helps.