1 09:58 Dark Chocolate & Acai: Antioxidant Superfoods by HealthyChocolateVids (9/19/09) 145 views Pronounced "sho-sigh", the "Xo" is for xocolatl, an ancient chocolate drink used for health and even as currency by the Mayans, Aztecs and others. The "cai" is for the super-antioxidant Acai berry from the Amazon region of South America.