It is a well known fact that Bitter Kola is a form of antibiotic. It kills micro-organisms or prevents them from multiplying. It is healthy therefore for consumption. There is no side effect under normal condition because it is natural consumable nut.
Issues of concern have risen recently as whether the consumption of Bitter kola has any effect on sperm count. Most treatment of sperm count includes active elements which would assist in keeping the cells in healthy condition. As anti-bacteria bitter kola would definitely help in combination of other herbs.