Cinnamonum burmannii

Botanical

What is it

Cinnamomum burmannii is the Indonesian cinnamon species (also called Korintje or Padang cassia); it is the primary source of cinnamon sold in U.S. supermarkets and the basis of the trademarked Cinnulin PF aqueous bark extract.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Fasting glucose reduction

Good Evidence

Cinnulin PF and whole C. burmannii bark have shown modest reductions in fasting glucose in type 2 diabetes trials.

How it works

Like other cassia cinnamons, C. burmannii contains cinnamaldehyde, MHCP polymers, and procyanidins that may improve insulin sensitivity. Cinnulin PF is a water-soluble extract designed to retain glucose-lowering polyphenols while reducing coumarin and oil-soluble components. Coumarin content of C. burmannii is high in whole bark but greatly reduced in aqueous extracts.

Dosage

No RDA. Whole-bark trials in diabetes use 1-6 g/day; Cinnulin PF doses are 250-500 mg/day.

When and how to take it

WHEN: With carbohydrate-containing meals. HOW: Take in tablet form or sprinkle powder on food.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Whole bark powder

Common in spice form.

High coumarin content.

Cinnulin PF aqueous extract

Used in diabetes-focused supplements.

Low coumarin; concentrated polyphenols.

Safety

Whole cassia bark coumarin content can exceed EFSA TDI for daily use. Aqueous extracts (Cinnulin PF) have much lower coumarin. Cinnamaldehyde can cause oral and skin irritation.

Who should be cautious

Use Cinnulin PF or Ceylon cinnamon for daily use; limit whole cassia. Caution in liver disease and pregnancy.

Interactions

Glucose-lowering effects may compound with diabetes medications. Coumarin in whole bark may interact with warfarin.

Food sources

Cinnamon powder (cassia)

Amount
1 tsp
%DV
—

Frequently asked questions

What is Cinnulin PF?⌄

A trademarked aqueous extract of C. burmannii used in many diabetes-focused supplements.

References

Cinnamonum burmannii on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Cinnamonum burmannii (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.