From the databaseWhat the row says.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
Scope
Supplement × Supplement
Last verified
June 4, 2026
SynergyModerate evidence
What is happening. Psyllium and peppermint oil may address different IBS symptom drivers: stool form and spasm.
Mechanism. Fiber bulking plus smooth-muscle relaxation may be complementary.
Recommendation. Use psyllium with plenty of water and peppermint oil before meals; separate if capsules seem delayed or symptoms worsen.
Stack Score
How it moves the number.
Effect on the composite score
If both Peppermint Oil (Enteric-Coated) and Psyllium Husk are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
SourcesSources, by evidence tier.
Every claim on this page is cited. PMIDs link straight to PubMed.
Reference material
1- 1Lacy BE et al. ACG IBS guideline. American Journal of Gastroenterology. 2021.Needs sourceNo link