Herbal Extract
Ceylon Cinnamon Bark Powder
Also known as: Cinnamomum verum, true cinnamon, Ceylon cinnamon, Cinnamomum zeylanicum
Ceylon cinnamon is the bark powder of Cinnamomum verum, containing cinnamaldehyde and polyphenols with traditionally documented effects on glucose metabolism and inflammatory markers. It differs from cassia cinnamon (Cinnamomum cassia) by having lower coumarin content.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Blood glucose management
- Insulin sensitivity support
- Antioxidant support
- Anti-inflammatory effects
- Cardiovascular health
How it works
- Polyphenol-mediated antioxidant activity
- Enhanced insulin receptor signaling
- Reduced glycemic index of meals
- Alpha-glucosidase inhibition
- Modulation of inflammatory pathways (NF-κB)
Dosage
- Typical range
- 1-6 grams daily (most studies use 1-2g daily)
- Timing
- With meals, particularly those high in carbohydrates
- With food
- Take with food; provides better glycemic benefit when consumed with meals
- Duration
- Minimal effects observed before 2-4 weeks. Most studies range 8-16 weeks; benefit sustained with continued use.
- Special populations
- Pregnancy/nursing: generally recognized as safe in culinary amounts; supplement use should be discussed with healthcare provider. Coumarin content much lower in Ceylon than Cassia cinnamon, making it safer for long-term supplementation.
Forms
- powder· 70/100
- capsule· 70/100
- extract· 70/100
- whole bark· 70/100
Safety
Common side effects
- Mild gastrointestinal upset
- Mouth irritation or inflammation (from powder)
- Allergic reactions (rare)
Contraindications
- Cinnamon allergy
- Severe hepatic impairment (caution with higher doses due to coumarin)
- Allergy to Cinnamomum species
Products containing Ceylon Cinnamon Bark Powder
Top-scoring supplements in our catalog that list Ceylon Cinnamon Bark Powder on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
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Evidence notes
Multiple RCTs show modest improvements in fasting glucose and HbA1c in prediabetic and diabetic populations. Effect sizes range from 5-25% improvement. Meta-analyses support benefit at 1-6g daily. Evidence stronger for metabolic effects than for other traditionally claimed uses.
Grade B: Some human trials support key claims; further confirmation needed.
Ceylon Cinnamon Bark Powder compared head-to-head
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.