Although Antimicrobial Growth Promoters (AGPs) are inducing growth and have been used extensively in the past; due to the increasing threat of antibiotic resistance, AGPs (antibiotics as growth promoters) have been banned in the European Union (EU) in 2006. Since then, antibiotic use is only allowed to treat diseases and therefore, the need for alternative growth promoters instead of using AGPs in the livestock farming is greater than ever.
Antibiotics as AGPs were covering up quite vast problems in animal rearing programs. After the ban of AGPs, as the antibiotic consumption decreased, a lot of other issues such as inflammation in the whole animal production process became apparent. Therefore, many subjects such as nutrition plan, biosecurity, animal welfare as alternatives to AGPs became more important.