Wizards of Waverly Place (2007)

S2E27 Wizards vs. Vampires: Tasty Bites

When Justin starts dating Juliet, a charming vampire, she encourages the Russos to embrace a healthier way of living, promoting nutritious meals and fitness. Yet, Alex grows suspicious of Juliet's motives for Justin, especially after learning that vampires are drawn to the flavor of wholesome blood. As tensions rise, Alex must uncover the truth about Juliet's intentions before it's too late.