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. PHGG can act as a fermentable substrate for beneficial bacteria and may complement probiotic use.
Mechanism. Prebiotic fiber supports bacterial fermentation and short-chain fatty acid production.
Recommendation. Combine gradually to avoid gas; start one product first in sensitive IBS.
Stack Score
How it moves the number.
Effect on the composite score
If both Partially Hydrolyzed Guar Gum (Sunfiber) and Probiotics 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- 1Yoon SJ et al. Partially hydrolyzed guar gum: clinical nutrition uses. Nutrition in Clinical Practice. 2015.Needs sourceNo link