Iron supplements and stool colour

[hose1975]

So, it's well known that taking iron supplements usually produces a black stool. But what might cause a sudden return to a "normal" colour?

I've not stopped taking the ferrous fumarate, and will allow for the possibility of having been prescribed a duff batch. Are there any other likely reasons?

[serenfach]

No idea really, unless your body suddenly needed every scrap! The other thought I had (rare!) is that if your gall bladder is having an off day, you get clay coloured stools - mix the two (colours, not stools, oh, TMI!!!) and you may get ordinary colour? Sorry not to be of further help.

[hose1975 in reply to serenfach]

Thanks. I know it's an odd and slightly TMI question, but the interwebs only provides information on the colour change when starting iron supps.