Supplement × Supplement·timing-sensitive·Emerging evidence

Galactooligosaccharides (GOS) + Iron

Timing Sensitive Emerging evidence

Fiber and oligosaccharides may reduce predictable iron supplement absorption when taken together.

From the database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, and the recommendation.

Pair type
Timing Sensitive
Evidence
Emerging
Source citations
1
Scope
Supplement × Supplement
Last verified
June 4, 2026
Timing SensitiveEmerging evidence

What is happening. Fiber and oligosaccharides may reduce predictable iron supplement absorption when taken together.

Mechanism. Altered transit and fiber matrix can reduce immediate mineral absorption reliability.

Recommendation. Separate iron supplements from GOS by at least 2 hours when correcting deficiency.

Timing

Timing & separation.

Space the doses apart by at least this window to avoid the conflict.

Minimum separation
120
Stack Score

How it moves the number.

Effect on the composite score

If both Galactooligosaccharides (GOS) 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.

Sources

Sources, by evidence tier.

Every claim on this page is cited. PMIDs link straight to PubMed.

Reference material

1
  • 1Staudacher HM et al. B-GOS and low-FODMAP diet. Gastroenterology. 2020.Needs sourceNo link

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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.