Can anyone tell me why milk which is delivered by the milkman has a use by date of no more than two or three days, whereas milk bought in the supermarket can have a use by date of seven or more days.Both are presumably pasteurised.
That's an interesting question, I expect supermarkets store it at much lower temperature. I get milk delivered (just to support the local dairy) however it gets left just after midnight and stays outside all night. In the summer it's a problem. I've certainly thrown more off milk away than when we used to get it at supermarket.