↑FMD after CF intake (highest increase observed in the presence of Mx); no effect on FMD after consuming Mx alone; ↓bPWV and DBP, while ↑CACs (CD34+/KDR+) after intake of CF alone (highest increase observed in the presence of Mx); ↑plasma (‐)‐epicatechin metabolites level in the presence of Mx (similar results observed in the group consuming pure (‐)‐epicatechin together with theobromine and caffeine). This evidence concerns the gene CD34 and cystic fibrosis.