The study was a randomized, controlled, double-blind, parallel multi-center study in which the 4 different types of cocoa products [1)cocoa and other ingredients (sugar and vegetal oils), 2)cocoa plus hazelnuts and other ingredients, 3)the same as 2 plus other ingredient and 4) cocoa, hazelnuts and other ingredients called (LMN)], introduced into a calorie-balanced diet for 4 weeks with a prior stabilization period of 2 weeks in which all participants received the cocoa product type 1. Cocoa product type 1 is a control of type 2, and types 1 and 2 were controls of types 3 and 4.