Anna Paquin has said that she dislikes drinking the fake blood provided on the set of True Blood and admitted that she enjoys filming the blood drinking scenes, but hates the taste of the red liquid after ingesting it over multiple takes.
“I get a kick out it, but the actual blood makes me want to gag!” she told Self. “It’s kind of a sweetcorn syrup, I think, with an aftertaste that’s less than pleasant after the tenth take. In season one, they asked me if I wanted sugar or sugar-free. I was like, ‘Sugar-free blood? Sounds great!'” however her enthusiasm for the sweet substance disappeared after the first scene. “It only tastes like the latex tubes it’s coming through. [I drank] ravenously from Bill’s arm so I drank probably a gallon. Never again.”
All I can say is Fake Blood on True blood *giggle*