Travelan is a natural product, designed to reduce the risk of infection by E. coli (ETEC), the most common cause of Travellers’ Diarrhoea.How does Travelan work?Travelan's active ingredient is Bovine Colostrum Powder, a rich source of antibodies that bind to ETEC in the gastrointestinal tract, preventing them from attaching to the intestinal wall and thereby neutralising their ability to cause TD and its associated symptoms.