What is Blood Alcohol Concentration (BAC)? BAC refers to the percentage of alcohol in a person's bloodstream. A BAC of 0.10% means that an individual's bloodstream contains one part alcohol for every ...

Oxygen from the air passes into the bloodstream in the lungs through structures called alveoli. It diffuses to a region of lower concentration in the bloodstream.

Participants each ingested a brownie containing various doses of Delta-8 or Delta-9, or a placebo, with researchers recording cannabinoid concentration in blood, subjective drug effects ...