I live in England and I am fortunate that I buy it at my local super market, both Tesco and Sainsbury. It isn't the organic variety it is my practical compromise between cost and quality. I am lucky to have a stomach built like a dustbin which appears to be able to digest anything.
When I make the potion I put lemon/grapefruit juice into a jar with a screw lid. I add about two teaspoons of ginger juice from some fresh ginger root to help control nausea and any other herb into the jar. I then pour in the olive oil. To take the potion I shake the jar violently to thoroughly mix contents and drink it immediately. You can block your nostrils with tissue and use a straw to reduce your aversion to the taste. Smell is a major contributory factor of taste.
I owe you a decent post after the other day after my tantrum.