Supplement × Supplement·timing-sensitive·Emerging evidence
Fiber can delay or reduce mineral supplement absorption when taken simultaneously.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
What is happening. Fiber can delay or reduce mineral supplement absorption when taken simultaneously.
Mechanism. Fiber matrix and altered transit can reduce immediate mineral absorption reliability.
Recommendation. Separate iron supplements from FOS by at least 2 hours when treating deficiency.
Space the doses apart by at least this window to avoid the conflict.
Effect on the composite score
If both Fructooligosaccharides (FOS) and Iron are in the same stack, this pair applies −5 to your Stack Score (per scored timing-sensitive row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
Every claim on this page is cited. PMIDs link straight to PubMed.
Check your full routine
Drop your supplements and prescriptions into NutriStack and it runs every pair at once: every interaction, synergy, timing rule, and contraindication, each linked to its primary source.
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.
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