Fiber can reduce medication absorption
Fiber supplements can bind to medications and reduce their absorption. Affects many medications.
Take medications 1-2 hours before or after fiber supplements.
Separate by 1-2 hours
Fiber can reduce medication absorption. Take medications 1-2 hours before or after fiber supplements.
Separate by 1-2 hours
This interaction is rated “Caution” by Formulate. Fiber supplements can bind to medications and reduce their absorption. Affects many medications.
Studies from our registry that mention fiber or medications. Each links to the primary source and the other Formulate pages citing it.
Other interactions to know
Fiber can reduce mineral absorption
Phytates in fiber reduce non-heme iron absorption
Check your full stack in the free interaction checker.
The free checker lets you add any combination of supplements and medications at once. The free web app goes further — every stack change surfaces interaction alerts automatically.
Paste in everything you take — supplements and medications — and every pairing gets flagged for severity, timing and cited evidence.
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Medical disclaimer. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.
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