It is a sad day when we (I had to do it today) have to spell out the bleeding obvious to preclude a numpty writing a brainbollox load of old cockwangle in reply to a perfectly rasonable and coherent post.:facepalm::thumbsup:
Just for the record, when a substance is absorbed, its pharmacological properties are by and large linearly proportional to the concentration (actually the log of the concentration, but let's not get too technical) in the blood. Blood levels are proportional to the amount ingested (if it is by...