Why is my faeces black in colour the morning after I eat some Oreos?
Day 1 : Eat a handful of Oreos & the next morning your stool is black.
Day 3 : Eat a handful of cocoa flavored biscuits & the next morning your stool is normal.
Day 5 : Eat a handful of Chocolates & the next morning your stool is normal.
I have experienced similar thing where stool has a reddish tint after consuming excessive beet root. But it just takes a handful of Oreos to turn it black. But with any other biscuits or chocolates, my faeces is a normal yellowish.
I don't have anything other than anecdotal evidence but a lot (NOT ALL) of my friends have had similar experience. Just Googling "Black stool after eating Oreos" & I see a lot of people (not all) having similar experience.
Why is that the case? Why doesn't it happen to everybody? What ingredient in Oreos makes it happen? Why it happens with reference to metabolism of our body? It doesn't affect my body in any way, although I can't be sure. Asking this question with curiosity than caution. Looking for medical/biological/biochemical perspective.