Cinnamon Bark Ingredients & Drug Interactions
by Gaia Herbs
What is this page for?
First and foremost: checking Cinnamon Bark against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
Cinnamon Bark is a dietary supplement by Gaia Herbs with 2 active ingredients. Its ingredients are commonly taken for blood sugar support, digestive upset, antioxidant support.Based on those ingredients, 442 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Cinnamon. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Cinnamon Bark by Gaia Herbs
Ask about any prescription or over-the-counter medication and we check it for interactions with Cinnamon Bark by Gaia Herbs — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of Cinnamon Bark by Gaia Herbs
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Low disclosure
This product has two active ingredients: cinnamon and an organic cinnamon bark supercritical CO2 extract. Both are forms of the same plant used to deliver cinnamon's compounds.
The inactive ingredients are vegetable glycerin, sunflower lecithin, water, and the vegan capsule itself.
Does it work?
Not established
The evidence for cinnamon in these areas hasn't been established in our data. We hold insufficient reliable evidence to rate it for amenorrhea, angina, common cold, diabetes, diarrhea, or dyslipidemia (abnormal blood fat levels).
That doesn't mean it doesn't work — just that the evidence we have isn't strong enough to say.
How safe is it?
Well-documented data
Cinnamon is generally well tolerated in food amounts. In clinical trials, one person developed a rash at 1 gram daily over 90 days, and one case of contact dermatitis cleared within five days of stopping.
The bigger caution is coumarin, the compound in cinnamon that can harm the liver with very high doses over extended time. Doses at 360 mg to 12 grams daily for three months in trials didn't significantly raise liver enzymes, but very high doses (50–7,000 mg daily) from coumarin alone can cause liver damage that reverses when you stop.
Food amounts are likely fine, but avoid medicinal or high-dose supplement amounts during pregnancy or breastfeeding due to limited safety data. In one trial, a person taking 1 gram daily reported a low blood sugar seizure, though it's unclear if cinnamon caused it.
Meds to double-check
Moderate interaction found
Check with your pharmacist or doctor if you take diabetes medications (cinnamon may lower blood sugar, possibly requiring dose adjustment) or any drugs that can stress the liver. These are Moderate-severity interactions.
The bottom line
Scorecard at a glanceFormula with limited ingredient disclosure with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.
If you take drugs for blood sugar control or liver stress, run this by your pharmacist or doctor before starting — dose adjustments to your medications may be needed. Cinnamon bark supplement is generally well tolerated at moderate doses, but long-term high-dose use requires caution because of its coumarin content and potential liver effects.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 21, 2022.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about Cinnamon Bark, straight from the product label.
| Brand | Gaia Herbs |
|---|---|
| Net contents | 60 Vegan Liquid Phyto-Cap(s)(R) |
| Market status | On market |
| Date entered into DSLD | Jul 21, 2022 |
| DSLD ID | 271109 |
| Product type | Botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for Cinnamon Bark by Gaia Herbs, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Total Carbohydrate | 1 Gram(s) | 1% |
| Proprietary Extract Blend | 278 mg | -- |
| Cinnamon | 0 NP | -- |
| organic Cinnamon bark supercritical CO2 extract | 0 NP | -- |
Other ingredients: Vegetable Glycerin, Sunflower Lecithin, water and vegan Capsule
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formulation
New look same formula
Glycemic support Helps maintain healthy glycemic balance Concentrated single herb extract
Natural separation may occur. This does not affect product quality.
Vegan
Gluten-free Soy-free
FDA Statement of Identity
Herbal Supplement
Formula
Each capsule contain 850 mg dry herb equivalent.
Suggested/Recommended/Usage/Directions
Suggested Use Adults take 1 capsule 2 times daily with meals.
Precautions
Not for using during pregnancy or lactation. If you have a medical condition or take medications, please consult with your doctor before use.
Store away from children.
Use only as directed on label. Safety-sealed for your protection.
Storage
Keep bottle capped at all times and store in a cool, dry place.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
General Statements
Meetyourherbs.com Gaia Herbs delivers unprecedented traceability by screening every product and sharing the results online. See for yourself, and learn more about your herbs, by entering the unique ID # below at meetyourherbs.com
Purity - Keep it clean All products are screened for pesticides, microbes & heavy metals. Integrity - Keep it real See the proof at meetyourherbs.com, the world's first herb traceability platform. Potency - Keep it strong Concentrated plant extracts are delivered in our patented Phyto-Caps technology. Discover our guiding truths at: Facebook Instagram @gaiaherbs
Seals/Symbols
EST 1987 USA Integrity Purity Potency Certified B Corporation
Brand IP Statement(s)
Gaia Herbs Connecting plants & people since 1987
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Cinnamon Bark by Gaia Herbs label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in Cinnamon Bark by Gaia Herbs
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.
Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.
Proprietary Extract Blend
Other (inactive) ingredients: Vegetable Glycerin, Sunflower Lecithin, Water and vegan Capsule. These complete the product’s ingredient list but are not active constituents.
Cinnamon Bark by Gaia Herbs Drug Interactions
HelloPharmacist Interaction Report
Cinnamon Bark by Gaia Herbs contains cinnamon extract that has documented interactions with two drug categories.
The most serious concern is with drugs that stress the liver (hepatotoxic drugs) — cinnamon contains a compound called coumarin that might add to that burden if you're taking high doses of this supplement long-term. The data shows this is a Moderate-severity interaction: theoretically, large doses could have additive liver-damaging effects.
Read the full breakdown — every affected drug type, severity by severity
Cinnamon may also lower blood sugar (glucose levels) and could work additively with diabetes medications. This is also Moderate severity, and dose adjustments to your diabetes drugs might be necessary if you start this supplement.
Always check your exact medications with the search tool on this page before starting. Altogether, these interactions span 425 individual medications.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Cinnamon Bark?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Cinnamon Bark interact with 442 drugs. Click any drug to see the details.
1 of the 2 ingredients in Cinnamon Bark interact with drugs. Each result below shows which ingredient is responsible. Cinnamon
Asparaginase Erwinia Chrysanthemi (recombinant)-rywnRylaze
How Asparaginase Erwinia Chrysanthemi (recombinant)-rywn interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Asparaginase Erwinia Chrysanthemi (recombinant)-rywn interactionAspirin, Caffeine, Phenacetin, PropoxypheneMargesic Comp. 65
How Aspirin, Caffeine, Phenacetin, Propoxyphene interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Aspirin, Caffeine, Phenacetin, Propoxyphene interactionAtorvastatinAtorvaliq
How Atorvastatin interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Atorvastatin interactionAtorvastatin CalciumLipitor
How Atorvastatin Calcium interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Atorvastatin Calcium interactionAvacopanTavneos
How Avacopan interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Avacopan interactionAzamuneImmunoprin
How Azamune interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Azamune interactionAzathioprineAzamune, Imuran
How Azathioprine interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Azathioprine interactionBaricitinibOlumiant
How Baricitinib interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Baricitinib interactionBelinostatBeleodaq
How Belinostat interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Belinostat interactionBenzhydrocodone, AcetaminophenApadaz
How Benzhydrocodone, Acetaminophen interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Benzhydrocodone, Acetaminophen interactionBimekizumab-bkzxBimzelx
How Bimekizumab-bkzx interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Bimekizumab-bkzx interactionBinimetinibMektovi
How Binimetinib interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Binimetinib interactionBismuth Subsalicylate, Metronidazole, TetracyclineHelidac
How Bismuth Subsalicylate, Metronidazole, Tetracycline interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Bismuth Subsalicylate, Metronidazole, Tetracycline interactionBortezomibVelcade
How Bortezomib interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Bortezomib interactionBosentanTracleer
How Bosentan interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Bosentan interactionBosutinibBosulif
How Bosutinib interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Bosutinib interactionCanagliflozinInvokana
How Canagliflozin interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, cassia cinnamon may have additive effects with antidiabetes drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Canagliflozin interactionCanagliflozin, MetforminInvokamet
How Canagliflozin, Metformin interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, cassia cinnamon may have additive effects with antidiabetes drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Canagliflozin, Metformin interactionCanagliflozin, Metformin HydrochlorideInvokamet XR
How Canagliflozin, Metformin Hydrochloride interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, cassia cinnamon may have additive effects with antidiabetes drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Canagliflozin, Metformin Hydrochloride interactionCannabidiol (prescription Drug)Epidiolex
How Cannabidiol (prescription Drug) interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Cannabidiol (prescription Drug) interactionCapmatinib HydrochlorideTabrecta
How Capmatinib Hydrochloride interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Capmatinib Hydrochloride interactionCarbamazepineCarbatrol, Carnexiv, Equetro, Tegretol, Tegretol XR
How Carbamazepine interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Carbamazepine interactionCarbenicillin Indanyl SodiumGeocillin
How Carbenicillin Indanyl Sodium interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Carbenicillin Indanyl Sodium interactionCarbimazoleNeo-Mercazole
How Carbimazole interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Carbimazole interactionCarfilzomibKyprolis
How Carfilzomib interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Carfilzomib interactionCeritinibZykadia
How Ceritinib interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Ceritinib interactionCerivastatin SodiumBaycol
How Cerivastatin Sodium interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Cerivastatin Sodium interactionChlorothiazide, MethyldopaAldochlor, Aldoclor 150, Aldoclor 250
How Chlorothiazide, Methyldopa interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Chlorothiazide, Methyldopa interactionChlorpropamideChlorpropam, Diabinese
How Chlorpropamide interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs, Antidiabetes Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Chlorpropamide interactionChlortetracyclineAureomycin
How Chlortetracycline interacts with Cinnamon Bark — through 1 ingredient. Tap an ingredient for the detail:
Organic Cinnamon Bark Supercritical Co2 ExtractHepatotoxic Drugs Moderate
Interaction Summary
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
Read the full Organic Cinnamon Bark Supercritical Co2 Extract + Chlortetracycline interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Cinnamon Bark with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
Cinnamon
Antidiabetes Drugs
Theoretically, cassia cinnamon may have additive effects with antidiabetes drugs.
Cassia cinnamon may lower blood glucose levels, and have additive effects in patients treated with antidiabetic agents. Dose adjustments to diabetes medications might be necessary.
Hepatotoxic Drugs
Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.
There is some concern that ingesting large amounts of cassia cinnamon for an extended duration might cause hepatotoxicity in some people. Cassia cinnamon contains coumarin, which can cause hepatotoxicity in animal models. In humans, very high doses of coumarin from 50-7000 mg/day can result in hepatotoxicity that resolves when coumarin use is discontinued. Lower amounts might also cause liver problems in sensitive people, such as those with liver disease or those taking potentially hepatotoxic agents.
Brand information
Manufacturer and brand details for Cinnamon Bark, from the product label.
Gaia Herbs
See all Gaia Herbs products- Name
- Gaia Herbs, Inc.
- Street Address
- 101 Gaia Herbs Dr.
- City
- Brevard
- State
- NC
- ZipCode
- 28712
- Web Address
- GaiaHerbs.com
Cinnamon Bark by Gaia Herbs: Common Questions
Does Cinnamon Bark by Gaia Herbs interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Is cinnamon safe to use while I'm pregnant or breastfeeding?
Can cinnamon actually help with blood sugar or diabetes?
What's coumarin, and why is it a concern in this product?
Are there any side effects I should know about?
Will this product interact with my blood pressure or cholesterol medications?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Cinnamon Bark is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind Cinnamon Bark’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Cinnamon Bark's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 20 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Cassia Cinnamon 20 references
- Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182
- Khan A, Safdar M, Ali Khan M, et al. Cinnamon improves glucose and lipids of people with type 2 diabetes. Diabetes Care 2003;26:3215-8. PubMed
- De Benito V, Alzaga R. Occupational allergic contact dermatitis from cassia (Chinese cinnamon) as a flavouring agent in coffee. Contact Dermatitis 1999;40:165. PubMed
- Drake TE, Maibach HI. Allergic contact dermatitis and stomatitis caused by a cinnamic aldehyde-flavored toothpaste. Arch Dermatol 1976;112:202-3.
- Press release. Cinnamon capsules to reduce blood sugar are medicinal products! Efficacy has not been scientifically proven - some products contain high levels of coumarin. Federal Institute of Risk Assessment (BfM), Germany, November 11, 2006. Available a
- Felter SP, Vassallo JD, Carlton BD, Daston GP. A safety assessment of coumarin taking into account species-specificity of toxicokinetics. Food Chem Toxicol 2006;44:462-75. PubMed
- Crawford P. Effectiveness of cinnamon for lowering hemoglobin A1C in patients with type 2 diabetes: a randomized, controlled trial. J Am Board Fam Med 2009;22:507-12. PubMed
- Akilen, R., Tsiami, A., Devendra, D., and Robinson, N. Glycated haemoglobin and blood pressure-lowering effect of cinnamon in multi-ethnic Type 2 diabetic patients in the UK: a randomized, placebo-controlled, double-blind clinical trial. Diabet.Med. 2010; PubMed
- Lu T, Sheng H Wu J Cheng Y Zhu J Chen Y. Cinnamon extract improves fasting blood glucose and glycosylated hemoglobin level in Chinese patients with type 2 diabetes. Nutr Res. 2012;32(6):408-412. PubMed
- Choi, J., Lee, K. T., Ka, H., Jung, W. T., Jung, H. J., and Park, H. J. Constituents of the essential oil of the Cinnamomum cassia stem bark and the biological properties. Arch Pharm Res 2001;24(5):418-423.
- Altschuler JA, Casella SJ, MacKenzie TA, Curtis KM. The effect of cinnamon on A1C among adolescents with type 1 diabetes. Diabetes Care 2007;30(4):813-6. PubMed
- Stoecker BR, Zhan Z, Luo R, et al. Cinnamon extract lowers blood glucose in hyperglycemic subjects. FASEB J. 2010;22:722.1 (Abstract only). DOI
- Admani S, Hill H, Jacob SE. Cinnamon Sugar Scrub Dermatitis: "Natural" Is Not Always Best. Pediatr Dermatol. 2017;34(1):e42-e43. PubMed
- Isaac-Renton M, Li MK, Parsons LM. Cinnamon spice and everything not nice: many features of intraoral allergy to cinnamic aldehyde. Dermatitis. 2015;26(3):116-21. PubMed
- Vandersall A, Katta R. Eyelid dermatitis as a manifestation of systemic contact dermatitis to cinnamon. Dermatitis. 2015 Jul-Aug;26(4):189. PubMed
- Wickenberg J, Lindstedt S, Nilsson J, Hlebowicz J. Cassia cinnamon does not change the insulin sensitivity or the liver enzymes in subjects with impaired glucose tolerance. Nutr J 2014 Sep 24;13:96. PubMed
- Brancheau D, Patel B, Zughaib M. Do cinnamon supplements cause acute hepatitis? Am J Case Rep 2015;16:250-4. PubMed
- Shekarchizadeh-Esfahani P, Heydarpour F, Izadi F, Jalili C. The effect of cinnamon supplementation on liver enzymes in adults: A systematic review and meta-analysis of randomized controlled trials. Complement Ther Med 2021;58:102699. PubMed
- Bernaola J, Valverde-Monge M, Otal-Buesa M, Cullen D, Heras-Mendaza F. Cinnamon allergic contact cheilitis. Contact Dermatitis 2023;88(5):418-419. PubMed
- Patel K, Howard M, Tate B. Cheilitis caused by allergic contact dermatitis to cinnamon in chai tea: A case report. Contact Dermatitis 2023;88(3):239-240. PubMed
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC