Phytogenic substances have several advantages over commonly used antibiotics since they are generally recognized as
safe and are commonly used items in the food industry (Varel, 2002; Brenes and Roura, 2010). The plant family Lamiaceae
has received the greatest interest in poultry feed, with peppermint, thyme and oregano as the most popular representatives
(Burt, 2004). These medicinal plants active components which are often called phytobiotics or botanicals are secondary
metabolites in medicinal plants with positives effects on animal health and productivity