From the databaseWhat the row says.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
Pair type
Timing Sensitive
Scope
Supplement × Supplement
Last verified
June 4, 2026
Timing SensitiveInsufficient evidence
What is happening. High-dose garlic extract can have antimicrobial and GI effects that may interfere with probiotic tolerance.
Mechanism. Potential antimicrobial effects and additive GI irritation.
Recommendation. Separate by about 2 hours and monitor gas or reflux.
TimingTiming & separation.
Space the doses apart by at least this window to avoid the conflict.
Stack Score
How it moves the number.
Effect on the composite score
If both Garlic Extract and Lactobacillus acidophilus NCFM 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.
SourcesSources, by evidence tier.
Every claim on this page is cited. PMIDs link straight to PubMed.
Reference material
1- 1Ouwehand AC et al. NCFM and lactitol in elderly. British Journal of Nutrition. 2008.Needs sourceNo link