Kourtney Kardashian drinks her own breast milk.

The reality TV star - who gave birth to son Mason in December - has tasted the nourishing fluid her body is now producing since becoming a mother, much to her sister's disgust.

Sibling Khloe tweeted: "Kourt just admitted that she tasted her own breast milk. Ummmm TMI. Wow my sister has changed. She used to whip her boobs out for no reason. Now she does it to feed her child (sic)."

Kourtney is not the only celebrity to try breast milk.

Pete Wentz admitted to tasting it after wife Ashlee Simpson-Wentz gave birth to their son Bronx in November 2008.

Although the rocker described it as "soury and weird" he knew how good it was for his baby son to drink it.

He said: "It tastes soury and weird. The baby loves it, it's the only thing he's had a chance to have."