Cross-referencing clinical data
A pairing appears on this page only when a trial gave both ingredients together and measured the result. Cinnamomum burmannii has none that clears that bar.
Stitching two separate single-ingredient studies into a pairing is the one thing this engine will not do. When a study of the combination itself holds up at source, it lands here with its citation.
No invented synergy. Where actives were studied on their own rather than together, the record shows each on its own evidence, never a combined effect no trial measured.
Research strength. Research strength says how much work stands behind the combination. It is never a product score.
Independent record. Every finding is cited to a named trial, dated, and never written by the brand.
20 pairings are live across the library today. Checked 20 July 2026.
No study gave these as a pair, so they are not in the card above. But the reason they belong together is settled biochemistry, not a guess, so it is worth knowing.
Chromium is involved in potentiating insulin receptor signalling, while cinnamon polyphenols have been examined for effects on intestinal carbohydrate-digesting enzymes and on insulin sensitivity. The routes do not overlap, which is the basis for combining them. Trials on the combination are far fewer than on either alone, and the Cochrane assessment of cinnamon for blood sugar found the evidence insufficient to draw conclusions.
Berberine acts substantially through AMPK activation and on the gut microbiome. Cinnamon polyphenols have been characterised as inhibitors of alpha-amylase and alpha-glucosidase, which slows starch breakdown in the intestinal lumen. Because one acts before absorption and the other after, the combination targets different points. Berberine has considerably stronger human data than cinnamon for these endpoints.
Gymnemic acids block sweet taste receptors and have been examined for effects on intestinal glucose uptake, while cinnamon acts largely on starch-digesting enzyme activity. The pairing is common in commercial formulas. Evidence for the combination specifically is absent, so this is formulation convention supported by non-overlapping mechanisms.
Cassia-type cinnamons, including C. burmannii (Indonesian or Korintje cinnamon), carry coumarin at concentrations one to two orders of magnitude above C. verum. Coumarin has a tolerable daily intake set by European authorities on the basis of liver effects in sensitive individuals. Using both together simply adds coumarin exposure without adding a distinct benefit. The species are not interchangeable at equal weight for this reason.
Proanthocyanidins are a major constituent class in cinnamon bark and are established chelators of dietary iron in the intestinal lumen. This is the same effect documented for tea and coffee polyphenols. The consequence is reduced absorption of non-heme iron taken at the same time. Spacing an iron dose a couple of hours from a concentrated cinnamon extract avoids the issue.
Vitamin C reduces ferric iron to ferrous iron and forms a soluble complex that resists precipitation by polyphenols. Where a cinnamon extract is taken with a meal containing non-heme iron, co-ingested ascorbate offsets part of the inhibitory effect. This is well-characterised iron absorption chemistry rather than anything specific to cinnamon.
Nothing specific on file for Cinnamomum burmannii. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.These are the studies our verdict leans on, chosen from the 3 we read for Cinnamomum burmannii. The full linked list is below.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.