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. Both may lower glucose and can be useful together but increase hypoglycemia risk when diabetes medication is present.
Mechanism. Additive effects on insulin sensitivity, AMPK-related signaling, and carbohydrate handling.
Recommendation. Use conservative doses and monitor glucose, especially when adding either product.
Stack Score
How it moves the number.
Effect on the composite score
If both Berberine and Cinnamon Extract 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- 1Allen RW et al. Cinnamon use in type 2 diabetes. Ann Fam Med. 2013.Needs sourceNo link