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Does anyone find taking vitamin D capsules turn their stool black?

Posted , 16 users are following.

carol7212
carol7212

Ive been taking Vitamin D capsules for a few months and noticed my stools are darker , sometimes even black. I've heard of this when you take iron supplements but not sure about VD. It has me concerned because black stool prior to this resulted in 2 colon polyps being removed but I'm not due for another colonoscopy for 2 years. I wondered if anyone else has experienced black stool while taking VD. I take 2000 IUs a day?

0 likes, 20 replies

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  • gavin28261
    gavin28261 carol7212

    Edited

    Hi everyone -

    After reading this, has calmed be down.

    I had my bloods test few weeks ago, and it came back inadequate - i.e. im just under.

    So from Saturday 17th June 2023 - i started to take this natural Vitamin D3+K2 2,000 Units till today. And today I have noticed my stools to be partly black-ish and flaky-ish. I did consume over a handful of blueberries too. I have this paranoia, as previously I had some stomach issues like a dull ache (been tested for FIT test all fine, dr ruling it as 'IBS'), but im just anxious about this stool, like when will it disappear? what foods do i need to consume to return back to normal texture, colour?

    Any advice greatly appreciate it,

    Best wishes,

    Gavin

    • carol7212
      carol7212 gavin28261

      Edited

      Hi Gavin,

      Sorry but I don't truly recall how long my stool remained blackish when taking Vitamin D3. It seems to me that after a few weeks when it wasn't so new to my system, it returned to normal. I was paranoid too because I had colon polyps in the past so when I seen the stool color darken I was quite concerned.

      Then I found out that taking Vitamin D3 can also be a cause.

      I'm not sure if there are any particular foods to bring your stool back to normal color and texture. By the way mine was flaky- ish also at the time.

      I think once your system has become use to the supplements the dark color and flaky texture will subside. Give it perhaps a few weeks.

      Cheers,

      Carol

  • terrance80432
    terrance80432 carol7212

    Posted

    hey carol sorry too message 7 years later but i just recently started taking 1000 iu vitamin d3 and its been about a week of me taking it and ive started too notice my stool gets darker blackish grey i guess you could say, did your symptoms ever go away while taking vd3 like did your body ever get used too it, please let me know!

    • carol7212
      carol7212 terrance80432

      Posted

      Hey Terrance,

      7 years wow ! Time really does fly lol.

      As I recall the blackish flaky stools disappeared after a month or so of starting the Vitamin D3. By disappeared I mean they returned to the normal brown color and normal texture.

      I wouldn't be too concerned if I were you since you say you've only recently began taking it. I had asked a few people I know who had began with the D3 and they had the same thing.

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