United States raw milk debate concluded that "raw milk poses a realistic health threat due to a possible contamination with human pathogens. It is therefore strongly recommended that milk should be heated before consumption. With the exception of an altered organoleptic [flavor] profile, heating (in particularly ultra high temperature and similar treatments) will not substantially change the nutritional value of raw milk or other benefits associated with raw milk consumption." Pasteurization opponents say that raw milk contains bacteria beneficial to the human digestive system, but pasteurization is not selective and affects all bacteria whether beneficial or infectious. These bacteria include species considered to be probiotics,
British railway milk trains train would then proceed to Waterloo, where it would reverse and return to Clapham Junction to pick up the other half of the train. The procedure was then repeated, so that the entire first milk train was unloaded between the end of evening peak traffic and the start of the following morning. The second train from Torrington would also split at Clapham Junction, but only half of its milk tanks would be propelled to Vauxhall, while the other half were dispatched to the Express Dairies depot at Morden. In the late morning, both trains' now empty milk tanks would be