As you tuck into your bowl of cereal this morning .. take a moment to think about what's in your milk.
It's been revealed that dairy giants Fonterra and Goodman Fielder put a green 'snot like' substance called permeate in their milk product to water it down.
They do it to standardise protein levels year-round, but refuse to say how much because that information is commercially sensitive.
Most of Australia's major milk brands decided to adhere to a self-imposed ban on permeate this year after a public outcry.
Graeme Brown, who's the chief executive of small Canterbury milk supplier Klondyke Fresh, says essentially they're adding a bottle of sludge to their milk and it's shocking.
Fonterra's defended its use of permeate, saying it needs to re-add the byproduct, so that it can standardise protein levels throughout the year.