. "Blood substitutes"@en . . "In much fan fiction, Nick regularly subsists on blood substitutes (also known as protein shakes), with only occasional backsliding into the consumption of blood. Canon suggests otherwise. In the actual television series, Nick only drinks Natalie's concoctions when she personally presents him with a new version; he invariably protests vigorously before trying it; and he drinks no more than a mouthful or two, often spitting out even that."@en . . "In much fan fiction, Nick regularly subsists on blood substitutes (also known as protein shakes), with only occasional backsliding into the consumption of blood. Canon suggests otherwise. In the actual television series, Nick only drinks Natalie's concoctions when she personally presents him with a new version; he invariably protests vigorously before trying it; and he drinks no more than a mouthful or two, often spitting out even that."@en . . . . .