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Symptom·Digestive·Reviewed May 30, 2026

Supplements for IBS with constipation (IBS-C) support.

When ibs with constipation (ibs-c) support is the complaint, these are the supplements most often associated with it in the NutriStack library, ranked by how directly each one targets it and by the strength of the evidence.

Matches6 supplementsStrong evidence0 of 6Last reviewedMay 30, 2026
Supplements

Ranked by relevance, top first.

Relevance reflects how directly each supplement targets this symptom in the NutriStack map. Evidence is the supplement’s own rating. Open any name for the full profile.

  1. 01
    Magnesium CitrateModerate
    90% match

    Magnesium citrate draws water into the bowel osmotically, softening stool and easing the constipation component of IBS-C.

    SuggestedPowder or capsule, 200 to 400 mg elemental magnesium in the evening
  2. 02
    Psyllium HuskModerate
    85% match

    Soluble gel-forming fiber increases stool water content and bulk, improving frequency and ease of passage in IBS-C.

    SuggestedPowder, 5 to 10 g daily with adequate fluids, titrated up slowly
  3. 03
    ProbioticsModerate
    70% match

    Certain strains can speed colonic transit and improve stool frequency and consistency in constipation-predominant IBS.

    SuggestedMulti-strain capsule with strains studied for transit (e.g., Bifidobacterium lactis), daily
  4. 04
    Vitamin CLimited
    52% match

    At higher oral doses vitamin C has an osmotic laxative effect that can promote bowel movements.

    SuggestedPowder or capsule, 1 to 3 g (dose-dependent laxative threshold)
  5. 05
    Ginger ExtractLimited
    45% match

    Ginger is a prokinetic that can stimulate gastric emptying and gut motility, potentially supporting sluggish transit.

    SuggestedStandardized extract capsule, 500 to 1000 mg daily
  6. 06
    Magnesium GlycinateLimited
    40% match

    Provides magnesium with a gentler GI profile, offering mild osmotic and smooth-muscle relaxant support.

    SuggestedCapsule, 200 to 400 mg elemental magnesium

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NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.