Why has my milk changed colours?
There are several reasons why breast milk changes colours. These include the normal change in breast milk colour from creamy yellow to a pale blue during the months after birth; mammary duct ectasia, which may turn the milk green; and a bacterium (Serratia marcescens) that turns it pink. Medication, vitamin preparations, sports drinks, gelatin, and other foods and drinks that contain a lot of dye may change the colour of milk to one of several possible colours. Managing the colour change depends on its cause.