Studies on the presence of natural and synthetic corticosteroids in bovine urine

► Low levels of prednisolone in bovines bred under controlled conditions. ► Prednisolone residues in bovine urine and high level of hydrocortisone and cortisone. ► Dexamethasone residues disappeared shortly after the treatment. ► Natural corticosteroids were detectable after 5 days the corticosteroid treatment end.