Cinnamomum burmannii.
Indonesian cinnamon is a cassia bark. Its type-A polyphenols slow the enzymes that break starch into glucose, which is why it turns up in formulas built around steady blood sugar.
- Category
- Herb
What Cinnamomum burmannii is, and what it does.
- Does it work
- Suits people who want the everyday spice in a measured form alongside starchy meals. If you want cinnamon with very little coumarin, the Ceylon species is the other choice.
- How much to take
- No daily amount is on record for this species, so start with the label amount and take it with a starchy meal, where the starch enzyme effect has something to act on.
- Time to feel it
- Any effect on how you handle a starchy meal happens inside that meal, over an hour or two. It shows up in a glucose reading rather than in sensation.
- The first dose
- Day one is a warm, sweet spice taste. Whatever it does to post-meal glucose registers on a meter, not as something you'd feel sitting at the table.
- With regular use
- Over weeks of daily use with meals, the studied outcomes are fasting and post-meal glucose on a blood panel. Results differ between trials, so watch the panel rather than the feeling.
- How well tolerated
- Cassia bark carries coumarin, and European authorities set a tolerable daily intake for it based on liver effects in sensitive people. Check with your clinician before daily use.
- How it feels
- Warm, sweet and slightly astringent on the tongue. Beyond the taste there's no sensation attached, which is normal for a polyphenol-rich bark.
- The overlooked benefit
- Its type-A polyphenols bind non-haem iron in the gut, so taking it with an iron supplement lowers how much iron you absorb. Space the two a couple of hours apart.
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
- healthy glucose metabolism after starchy mealsMeta-analysis
- inhibition of starch digesting enzymesIn vitro study
- antioxidant polyphenol content of the barkNarrative review
- blood lipids already in the normal rangeMeta-analysis
- reduced absorption of non-haem iron taken at the same timeIn vitro study
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
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.What Cinnamomum burmannii actually does.
This is Indonesian or Korintje cinnamon, one of several cassia-type species sold simply as cinnamon, and it's a different plant from Ceylon or true cinnamon.
Cassia cinnamons like this one contain much more coumarin than true cinnamon, and European health authorities have set a daily intake limit for coumarin because of liver effects seen in sensitive people.
The characteristic smell comes mostly from cinnamaldehyde, which makes up most of the bark's essential oil and activates a receptor that produces the warming sensation you feel from cinnamon.
Cinnamon bark is rich in a type of polyphenol that can bind minerals in the gut, which can reduce absorption of non-heme iron if eaten at the same time.
Getting Cinnamomum burmannii from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
The essence, in one line each.
- Reviewed Cinnamomum species phytochemistry and pharmacology, and flagged coumarin content as the principal toxicological consideration separating cassia-type species from Cinnamomum verum.Narrative review. Sharifi-Rad J et al., 2021 (Frontiers in Pharmacology). PMID 34045956 ↗
- Concluded there was insufficient evidence to support cinnamon for blood sugar endpoints, with trials limited by small size and inconsistent preparations.Systematic review. Leach MJ et al., 2012 (Cochrane Database of Systematic Reviews). PMID 22972104 ↗
- Cinnamon extracts inhibited carbohydrate-digesting enzyme activity and altered starch digestion in vitro, with the magnitude differing meaningfully between Cinnamomum species.In vitro study. Hayward NJ et al., 2019 (Plant Foods for Human Nutrition). PMID 31372918 ↗
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.