[thinkingemote]

Just a little aside for those doing a search in the future: many things you consume can also turn poop reddish so be sure to think about what you had for dinner if you've just noticed it. For example; beetroot, red wine, berries, stuff with food colouring etc.

[joveian]

In particular what you ate the past sveral days since it takes time to go through (exactly how long depends on your diet and body, but I think 2-3 days is common and a another couple of days is not uncommon). It takes long enough that it is easy to forget.