How long can milk be kept after the sell-by date?
after the sell buy date, raw milk will slowly turn ‘sour’ the speed of fermentation will depend on the temperature. The higher the temperature, the quicker the fermentation. The lactose inside the milk turns into lactic acid and milk becomes unpleasant. Pasturisation will increase shelf life but will eventually spoil, there will be a unpleasant odour and the milk, if drunk nay cause food poisoning. UHT milk may be stored unrefridgerated for many months until opened and will slowly deteriorate. Stirilized, which is heat treated will last longer, but loses nutrients and will taste differently.
