The 5 Best Ceylon Cinnamon Supplements of 2026, Ranked on Their Labels
We put the four most-reviewed cinnamon supplements on Amazon next to Dosera's and read every label: species, bark or extract, chromium, a coumarin number, and the cost for 30 days. Dosera ranks first on the label. Every rival is cheaper, by $9.34 to $16.33 a month, and we say so.
Every score here is ours. We earn money when you buy through links on this page, and the scores stay the same either way. How we’re funded
- bottles ranked on their labels
- 5
- labels that print a coumarin number
- 1 of 5
- cheapest 30 days (Carlyle)
- $5.00
- most expensive 30 days (Dosera)
- $21.33
The short answer
Dosera's Ceylon cinnamon ranks first on the label. Every other bottle here is cheaper.
Dosera is the only bottle that combines verified Ceylon bark at 1,000 mg, a 10:1 extract and chromium, and the only one that prints a coumarin number. NutriFlair comes second with true Ceylon bark at the same 1,200 mg for $10.50 a month. The four rivals cost $5.00 to $11.99 for 30 days against Dosera's $21.33.
- Won: Dosera, 84 of 100. Ceylon bark plus extract plus chromium, coumarin 0.1% or less printed, lab-tested every batch.
- Second: NutriFlair, 61. True Ceylon bark at 1,200 mg, half Dosera's monthly cost, but no extract, no coumarin number, and a Prop 65 lead warning on its listing.
- The caveat: if you only want 1,200 mg of Ceylon bark, Nutricost does that for $6.38 a month, $14.95 less than Dosera.
All 5, highest score first
- 1Dosera Ceylon Cinnamon 1,200 mgA- · 84
- 2NutriFlair Organic Ceylon Cinnamon 1200mgC+ · 61
- 3Nutricost Cinnamon (Ceylon) 1,200mgC · 59
- 4Carlyle Ceylon CinnamonC · 53
- 5Nature's Bounty Cinnamon 2000mg Plus ChromiumC · 52
See the Dosera bottle ($21.33 a bottle) »or compare all 5 side by side
Grade A- · 84 of 100
Dosera Ceylon Cinnamon 1,200 mg
★ 4.8 from 1,764 reviews on the maker's page
60 capsules · 30 days
- True Ceylon bark 1,000 mg plus 200 mg 10:1 extract
- Coumarin printed at 0.1% or less, 200 mcg chromium
- 2 capsules a day, lab-tested every batch
The $20.99 bottle on Amazon is 600 mg of Ceylon bark a capsule, 120 capsules, so 1,200 mg a day costs $10.50 a month. Dosera is $21.33 a month, $10.83 more, and adds a 10:1 extract, chromium and a printed coumarin number.
$21.33 a bottlefree US shipping
Check price →Sold direct by Dosera · 30-day money-back guarantee, nothing to send back · free US shipping
or see the table first ↓Why the label decides which cinnamon to buy
"My numbers were still high in the morning - 115-130," one WebMD reviewer wrote. Someone told you cinnamon helps. Then you read the warnings. "Unless you specifically look for ceylon you probably have cassia," one owner said. Another: "unreputable sellers will sometimes sell regular cinammon as Ceylon Cinnamon." So you search for the best Ceylon cinnamon supplement, and Amazon shows you twenty bottles that all say 1,200 mg.
The owners who have been through this say the same thing. "Cut a capsule open and see what is inside." "Make sure you read the ingredients list." "Please note that these are 600 mg capsules. Product label in amazon is misleading." They are not asking about marketing. They are asking what species is in the bottle, how many milligrams a capsule really holds, whether anyone measured the coumarin, and what a month costs.
Those are label questions, and labels can be checked. So that is what we did. We took the four cinnamon supplements with the most Amazon ratings, put Dosera's bottle next to them, and read every panel, every ingredients line and the twelve most helpful 1-star reviews on each. Here is what the labels say, side by side.
All 5 side by side
| Rank | Bottle | Score | Cinnamon per serving | Species on the label | Chromium and coumarin | Cost for 30 days |
|---|---|---|---|---|---|---|
| 1 | Dosera Ceylon Cinnamon 1,200 mg Dosera | A-84 | 1,000 mg Ceylon bark + 200 mg 10:1 extract, 2 capsules | Cinnamomum verum, printed | Chromium 200 mcg; coumarin 0.1% or less, printed | $21.33 |
| 2 |  NutriFlair Organic Ceylon Cinnamon 1200mgNutriFlair | C+61 | 1,200 mg Ceylon bark powder, 2 capsules | Cinnamomum verum, in the Amazon bullets | No chromium; coumarin tested, no number | $10.50 |
| 3 |  Nutricost Cinnamon (Ceylon) 1,200mgNutricost | C59 | 1,200 mg Ceylon bark powder, 2 capsules | "Cinnamon Verum" on Amazon; Latin name written inconsistently | No chromium; no coumarin statement | $6.38 |
| 4 |  Carlyle Ceylon CinnamonCarlyle | C53 | 400 mg of 10:1 extract, 2 capsules ("4,000 mg equivalent") | "Ceylon Cinnamon" on Amazon; C. verum in the NIH label database | No chromium; no coumarin statement; rice powder filler | $5.00 |
| 5 |  Nature's Bounty Cinnamon 2000mg Plus ChromiumNature's Bounty | C52 | 1,000 mg cassia bark + 250 mg 4:1 extract, 2 capsules (Amazon label) | Cinnamomum burmannii: cassia, not Ceylon | Chromium 400 mcg; no coumarin statement | $11.99 |
1Dosera Ceylon Cinnamon 1,200 mgA-
- Cinnamon per serving
- 1,000 mg Ceylon bark + 200 mg 10:1 extract, 2 capsules
- Species on the label
- Cinnamomum verum, printed
- Chromium and coumarin
- Chromium 200 mcg; coumarin 0.1% or less, printed
- Cost for 30 days
- $21.33
2NutriFlair Organic Ceylon Cinnamon 1200mgC+
- Cinnamon per serving
- 1,200 mg Ceylon bark powder, 2 capsules
- Species on the label
- Cinnamomum verum, in the Amazon bullets
- Chromium and coumarin
- No chromium; coumarin tested, no number
- Cost for 30 days
- $10.50
3Nutricost Cinnamon (Ceylon) 1,200mgC
- Cinnamon per serving
- 1,200 mg Ceylon bark powder, 2 capsules
- Species on the label
- "Cinnamon Verum" on Amazon; Latin name written inconsistently
- Chromium and coumarin
- No chromium; no coumarin statement
- Cost for 30 days
- $6.38
4Carlyle Ceylon CinnamonC
- Cinnamon per serving
- 400 mg of 10:1 extract, 2 capsules ("4,000 mg equivalent")
- Species on the label
- "Ceylon Cinnamon" on Amazon; C. verum in the NIH label database
- Chromium and coumarin
- No chromium; no coumarin statement; rice powder filler
- Cost for 30 days
- $5.00
5Nature's Bounty Cinnamon 2000mg Plus ChromiumC
- Cinnamon per serving
- 1,000 mg cassia bark + 250 mg 4:1 extract, 2 capsules (Amazon label)
- Species on the label
- Cinnamomum burmannii: cassia, not Ceylon
- Chromium and coumarin
- Chromium 400 mcg; no coumarin statement
- Cost for 30 days
- $11.99
How we scored the five bottles
We scored on six things a hostile reader can check on the label: whether it names true Ceylon, whether it gives bark and an extract, whether it adds chromium, whether it prints a coumarin number, what 30 days costs, and what the 1-star reviews say. The weights are printed on each card below. Cost carries 20 of the 100 points, and Dosera scores lowest on it. Species carries 25, because this is a Ceylon ranking and one of the five bottles is cassia.
Every rival fact was read off its Amazon listing, its maker's page or the NIH Dietary Supplement Label Database on October 20, 2026. Where the Amazon label and the maker's site disagree, as they do for Nature's Bounty, we used the Amazon label and said so. Dosera's facts come from its own product page. We did not treat the Amazon prices as fixed; they were list prices for a signed-out US visitor that day.
True Ceylon on the label25%
Whether the label names Cinnamomum verum (true Ceylon) and how clearly. A bottle that says only "cinnamon", or names a cassia species, scores low here.
Bark plus extract15%
Whether a serving gives whole bark powder at a studied amount and a concentrated extract on top. Bark alone or extract alone scores in the middle.
Chromium included10%
Whether the same capsules carry chromium, and how much. Two of the five do. We gave this the smallest weight because this page is about cinnamon.
Coumarin number printed15%
Whether the label or the maker's page prints a coumarin figure or limit. Saying it is tested, with no number, earns part marks. Saying nothing earns none.
Cost for 30 days20%
What 30 days costs at the label serving, using the Amazon list prices we saw on October 20, 2026. The cheapest bottle scores 100. Dosera scores lowest here.
Verified complaints15%
The share of 1-star ratings and what they say. We read the 12 most helpful 1-star reviews per rival. Dosera's rating is on the maker's page, not Amazon, so it does not get full marks.
- · We did not lab-test any bottle. Every species, mg and coumarin figure is the maker's own label claim.
- · We did not score capsules a day, because all five bottles are two capsules a day.
- · We did not score how well cinnamon works. That is on the Ceylon cinnamon benefits guide, claim by claim.
- · Dosera's 4.8 rating is on the maker's page, not Amazon, so we had no independent 1-star reviews to read and did not give it full marks on complaints.
- · Reviews can be bought, which is why the FTC banned fake reviews in 2024 [10]. We read 1-star reviews because nobody pays for those.
- · Amazon prices change daily. Re-check before you buy.
The ranking, 1 to 5
Dosera Ceylon Cinnamon 1,200 mg
Dosera · True Ceylon bark 1,000 mg + 10:1 extract 200 mg + chromium 200 mcg, 2 capsules
★ 4.8 from 1,764 reviews on the maker's page
The only bottle here with Ceylon bark, an extract and chromium together, and the only one that prints a coumarin number. It is also the most expensive of the five.
Each capsule holds 500 mg of true Ceylon bark powder and 100 mg of a 10:1 bark extract. Two a day give 1,000 mg of bark, 200 mg of extract and 200 mcg of chromium. The label names the species, Cinnamomum verum, and prints coumarin at 0.1% or less. At that ceiling two capsules hold at most 1.2 mg of coumarin. ConsumerLab says adults should not go over about 7 mg a day [7], and European food safety experts put the limit at 0.1 mg per kg of body weight, about 6.8 mg for a 150-pound adult [4].
It ranks first because no other bottle here combines all three things: verified Ceylon bark at 1,000 mg, a concentrated extract, and chromium. No rival prints a coumarin number at all. Dosera says every batch is lab-tested. The 1,200 mg of cinnamon material sits inside the 1 to 2 gram range most capsule studies used [1, 3], and the newest study, 210 adults on a true Ceylon extract for 4 months, saw fasting blood sugar fall from where it started [2].
Now the honest part. It is the most expensive of the five by a wide margin. At $21.33 a bottle it costs $21.33 for 30 days. Carlyle costs $5.00, Nutricost $6.38, NutriFlair $10.50 and Nature's Bounty $11.99. That is $9.34 to $16.33 more a month than any rival, and Nutricost gives the same 1,200 mg of Ceylon bark for $6.38. Its 4.8 rating from 1,764 reviews is on the maker's own page, not on Amazon, so we had no independent 1-star reviews to read. The 30-day money-back guarantee has nothing to send back.
Pros
- Cinnamomum verum printed on the label, not just "Ceylon" or "cinnamon"
- 1,000 mg of bark plus 200 mg of 10:1 extract in the same two capsules
- Coumarin printed at 0.1% or less, the only bottle of the five with a number
- 200 mcg chromium included, every amount listed, no blend
- Lab-tested every batch, 30-day money-back guarantee, free US shipping
Cons
- The most expensive bottle here: $9.34 to $16.33 more a month than every rival
- Nutricost gives the same 1,200 mg of Ceylon bark a day for $6.38 a month
- Its reviews are on the maker's page only, so there are no Amazon 1-star reviews to check
- Two capsules at two meals, every day. Owners who skipped days say the morning number crept back
$21.33 a bottlefree US shipping
Sold direct by Dosera · 30-day money-back guarantee, nothing to send back · free US shipping
NutriFlair Organic Ceylon Cinnamon 1200mg
NutriFlair · Organic Ceylon bark powder 600 mg per capsule, 2 a day for 1,200 mg
NutriFlair’s listing photo. Not sold here.
The most-reviewed Ceylon bottle on Amazon, true Ceylon bark at the same 1,200 mg as Dosera, for about half the monthly cost. Bark only, no number for coumarin.
Each capsule holds 600 mg of certified organic Ceylon cinnamon bark powder, and the Amazon bullets name the species, Cinnamomum verum. Two a day give 1,200 mg, the same amount of bark as Dosera, with no extract and no chromium. The capsule is organic pullulan. The listing says each batch is third-party tested, without naming the lab, and that testing includes an analysis of coumarin content. No coumarin figure or limit is printed anywhere. The Amazon listing carries a California Prop 65 lead warning. At $20.99 for 120 capsules, 30 days costs $10.50, which is $10.83 less than Dosera.
It has 23,413 Amazon ratings at 4.6 stars, with 2% one-star, about 187 reviews. The most common 1-star theme is that the capsules no longer smell or taste like cinnamon and may not be Ceylon, with some reviewers tying that to coumarin worries. One wrote: "The capsule color has gotten lighter & they no longer smell like cinnamon." NutriFlair is one of four supplements in ConsumerLab's 2025 cinnamon test. The named results are behind a paywall, so we do not know how it did [8].
Pros
- True Ceylon, species named, certified organic bark powder
- 1,200 mg a day, the same bark amount as Dosera, for $10.50 a month
- Says each batch is third-party tested and that coumarin is analysed
- The most-reviewed Ceylon cinnamon bottle on Amazon: 23,413 ratings
Cons
- Bark powder only, no extract and no chromium
- No coumarin number printed, only a line saying it is analysed
- Carries a California Prop 65 lead warning on its listing
- 1-star reviews repeatedly question the smell and whether it is still Ceylon
- The testing lab is not named
$20.99 on Amazon, $10.50 for 30 days at 1,200 mg
120 capsules · 60 days at 2 a day
Nutricost Cinnamon (Ceylon) 1,200mg
Nutricost · Organic Ceylon bark powder 600 mg per capsule, 2 a day for 1,200 mg
Nutricost’s listing photo. Not sold here.
The cheapest true Ceylon bark powder of the five, $6.38 a month for the same 1,200 mg as Dosera. No extract, no chromium, no coumarin number.
Each capsule holds 600 mg of organic Ceylon cinnamon bark powder. Two a day give 1,200 mg, and 150 capsules last 75 days. Amazon's ingredients line reads "Cinnamon Verum" and a retailer's copy of the panel reads "Cinnamomum ceylon", so both point to Ceylon but the Latin name is written two different ways. There is no extract, no chromium and no coumarin statement at all. The listing says it is third-party tested, without naming the lab. The brand's own 240-count listing carries a California Prop 65 lead warning. At $15.95 for 150 capsules, 30 days costs $6.38, which is $14.95 less than Dosera.
It has 2,636 Amazon ratings at 4.6 stars, with 1% one-star, about 27 reviews. That is the lowest one-star share among the rivals, so it scores well on complaints. The theme in the 1-star reviews is the same as NutriFlair's: no cinnamon smell, and doubt that it is Ceylon. One reviewer wrote: "when opening other companies bottles of cinnamon supplements I have always gotten a whiff of cinnamon smell. But this one, nothing". Another said the capsules were unequally filled and gritty.
Pros
- The cheapest true Ceylon bark here: $6.38 for 30 days at 1,200 mg
- Same 1,200 mg of bark a day as Dosera, organic, in a pullulan capsule
- Only 1% one-star ratings, the lowest share of the four rivals
- Says it is third-party tested in an NSF certified facility
Cons
- No coumarin number or statement anywhere
- Bark powder only, no extract and no chromium
- Carries a California Prop 65 lead warning on the brand's own 240-count listing
- The Latin name is written two different ways across its listings
- 1-star reviews say it has no cinnamon smell
$15.95 on Amazon, $6.38 for 30 days at 1,200 mg
150 capsules · 75 days at 2 a day
Carlyle Ceylon Cinnamon
Carlyle · 10:1 Ceylon extract 200 mg per capsule, 2 a day for 400 mg, sold as "4,000 mg equivalent"
Carlyle’s listing photo. Not sold here.
The cheapest bottle of the five at $5.00 a month, but the "4,000 mg" is 400 mg of extract plus rice powder. No bark, no chromium, no coumarin number.
This one needs explaining. The front of the bottle says 4,000 mg per serving. The supplement panel says that comes from 400 mg of a 10:1 extract, 200 mg per capsule, with no whole bark at all. A 10:1 extract means 10 grams of bark were concentrated into 1 gram of powder, so the maker multiplies by ten and prints the bigger number. The first "other ingredient" is rice powder, listed before the gelatin capsule, which means it is a filler that makes up the rest of the capsule. Amazon's ingredients line says only "Ceylon Cinnamon"; the NIH label database record for this product names Cinnamomum verum [12]. There is no chromium and no coumarin statement. The label says "Laboratory Tested" with no outside lab named. At $9.99 for 120 capsules, 30 days costs $5.00, which is $16.33 less than Dosera.
It has 3,077 Amazon ratings at 4.6 stars, with 2% one-star, about 47 reviews. Amazon's own summary notes "several customers noting a lack of cinnamon smell and taste." Reviewers also doubt that a capsule smaller than their old 500 mg pills holds 4,000 mg of anything. One wrote: "they list Rice powder as an ingredient, well I opened a cap and tasted it, barely any cinnamon taste". Carlyle is not in any ConsumerLab cinnamon test we found.
Pros
- The cheapest bottle here: $5.00 for 30 days
- A 10:1 extract, the only rival with a concentrated form
- Cinnamomum verum in the NIH label database record
Cons
- "4,000 mg" on the front is 400 mg of extract; there is no whole bark
- Rice powder is the first filler, listed before the capsule itself
- No coumarin statement and no chromium
- "Laboratory Tested" with no outside lab named
- 1-star reviews say it has no cinnamon smell or taste
$9.99 on Amazon, $5.00 for 30 days at the label dose
120 capsules · 60 days at 2 a day
Nature's Bounty Cinnamon 2000mg Plus Chromium
Nature's Bounty · Cassia (Cinnamomum burmannii) bark 500 mg + 4:1 extract 125 mg per capsule, 2 a day, chromium 400 mcg
Nature's Bounty’s listing photo. Not sold here.
A well-reviewed cassia bottle with bark, an extract and the most chromium here. But it is not Ceylon, and at 1,000 mg of cassia bark a day the coumarin question is live and the label gives no number.
This is the one bottle here that is not Ceylon. The ingredients name Cinnamomum burmannii, a cassia-type cinnamon, plus a "Cinnamomum spp." extract. The front says "Cinnamon", not "Ceylon". The Amazon label gives 1,000 mg of bark and 250 mg of a 4:1 extract per two capsules, which the maker counts as "2,000 mg" of cinnamon. The maker's own site shows a different split, 500 mg of bark and 375 mg of extract, so the two labels disagree, and we used the Amazon one. Each serving also carries 400 mcg of chromium picolinate, twice Dosera's amount, which is why it wins the chromium bar. There is no coumarin statement. At $11.99 for 60 capsules, 30 days costs $11.99, which is $9.34 less than Dosera.
Cassia is the type most of the older cinnamon studies used [1, 11], so this is not a bad bottle. The issue is daily intake. At 1,000 mg of cassia bark a day, ConsumerLab says adults should not go over about 7 mg of coumarin a day and that Ceylon contains far less [7]. Nature's Bounty prints no coumarin figure, so you cannot check. It has 14,770 Amazon ratings at 4.7 stars, with 1% one-star, about 81 reviews. The 1-star themes are the cassia question, capsule size, and the headline number. One reviewer wrote: "In bold letters readable in the photo it is stated as '2000mg' in tiny letters (not visible till you get the product) it says 'per serving'."
Pros
- Bark plus a 4:1 extract in the same capsule, the only rival with both
- 400 mcg chromium, the most of the five
- 4.7 stars from 14,770 Amazon ratings, 1% one-star
- $11.99 for 30 days, $9.34 less than Dosera
Cons
- Cassia (Cinnamomum burmannii), not Ceylon, at 1,000 mg of bark a day
- No coumarin statement, so the daily intake cannot be checked
- The Amazon label and the maker's site give different amounts of bark and extract
- "2000mg" on the front is an equivalence figure for two capsules, not a capsule
- Gelatin capsule, and 1-star reviews call it hard to swallow
$11.99 on Amazon, $11.99 for 30 days
60 capsules · 30 days at 2 a day
You chose a bottle. What happens next, week by week
- Day 1Open a capsule. Whichever bottle you bought, open one. Ceylon powder is light tan and smells sweet and mild. If it smells of nothing, or like dirt, that is what the 1-star reviews warned about.
- Days 1 to 7Nothing on the meter yet. This is normal. Take one capsule with breakfast and one with dinner, in the middle of the meal, and write down your fasting number each morning.
- Weeks 2 to 4The morning number may start to drift. In 10 studies with 543 people, fasting blood sugar fell about 25 mg/dL on average [1]. Not everyone sees that. If you bought Dosera, the 30-day money-back guarantee covers a bottle that did nothing.
- Weeks 6 to 8Compare your 4-week averages. Trends, not single days. Owners say skipped days show on the meter. If nothing has moved, ask your doctor about a next step rather than doubling the dose.
- Month 3The A1c recheck. Take your log to the doctor. The pooled studies point to a small A1c change at most [1, 11], so the morning number is the better thing to watch.
Buyer's guide: what to look for on a Ceylon cinnamon label
Look for
- Cinnamomum verum printed. That is the Latin name for true Ceylon. "Cinnamon" alone usually means cassia in the US, and "Ceylon" on the front is a claim, not proof.
- A coumarin number. A figure or a limit, on the label or the maker's page. Of the five bottles here, only Dosera prints one.
- Real milligrams per capsule. The mg in one capsule and the capsules in a serving, both clear. Then you can work out what a month really costs.
- A testing line you can read. "Lab-tested every batch" or "third-party tested" on the label. Better still if the lab is named. None of the five names one.
Red flags
- "Equivalent" milligrams. "4,000 mg equivalent" or "2,000 mg" in big print with the real amount in small print. Carlyle's 4,000 mg is 400 mg of extract plus rice powder.
- A cassia species on a bottle you thought was Ceylon. Cinnamomum burmannii, cassia or aromaticum are cassia types. At 1,000 mg of bark a day, the coumarin question is live and the label should answer it.
- A filler listed before the capsule. If rice powder or another filler sits first in "other ingredients", it is bulking out the capsule. Open one and smell it.
- Lead worries read off the wrong product. The FDA's lead alerts since 2024 concern ground cinnamon sold as a spice, not capsules, and name none of the brands on this page [9]. A Prop 65 line on a listing is a California disclosure, not an FDA alert. Still, pick a bottle that says it is tested.
What if it does nothing?
Some people will take any of these five bottles for a month and see no change on the meter. The studies say so. The 2012 Cochrane review of 10 studies with 577 people called the fasting blood sugar result inconclusive [11], and roughly a third of the forum voices we read said cinnamon "did nothing" for them. "I've been taking two 500 mg capsules each morning for a couple months now and am not seeing any benefit," one TuDiabetes member wrote. That is a real outcome and the page would be lying to hide it.
The good news is what moved the numbers most in the big US prevention study was not a capsule. In 3,234 adults with prediabetes, a program of eating changes and about 150 minutes of walking a week cut new type 2 diabetes by 58% [13]. Two capsules with meals is the easy part you can keep up while you work on the rest. If the bottle does nothing for you in 30 days, the honest move is to stop buying it, and with Dosera you get the money back.
Sold direct by Dosera · 30-day money-back guarantee, nothing to send back · free US shipping. A supplement is not a substitute for medicine. If you take medicine for blood sugar, talk to your doctor before you start any of these bottles.
Questions people ask
Which Ceylon cinnamon supplement is best?
On the label, Dosera's. It is the only one of the five that combines true Ceylon bark at 1,000 mg, a 10:1 extract and chromium, and the only one that prints a coumarin number, 0.1% or less. If you only want Ceylon bark powder and the lowest price, Nutricost gives 1,200 mg a day for $6.38 a month and NutriFlair for $10.50. Neither prints a coumarin number.
Is Ceylon cinnamon better than regular cinnamon?
Regular cinnamon in US kitchens is almost always cassia. Cassia held 2,650 to 7,017 mg of coumarin per kg in one test of 60 shop samples, and true Ceylon bark had only traces [5, 6]. Most older blood sugar studies used cassia, but a 2025 study of 210 adults used a true Ceylon extract and saw fasting blood sugar fall [2]. Ceylon is the one you can take every day without doing coumarin math.
How much coumarin is safe per day?
European food safety experts set 0.1 mg per kg of body weight a day, about 6.8 mg for a 150-pound adult [4]. ConsumerLab puts it at about 7 mg a day for adults, less for children [7]. Two Dosera capsules hold at most 1.2 mg at the printed 0.1% ceiling. None of the four rivals prints a coumarin number, so you cannot do that sum for them.
Is Nature's Bounty Cinnamon Plus Chromium Ceylon cinnamon?
No. Its ingredients name Cinnamomum burmannii, a cassia-type cinnamon, plus a "Cinnamomum spp." extract. The front says "Cinnamon", not "Ceylon". It gives 1,000 mg of cassia bark a day on the Amazon label and prints no coumarin figure. It does carry 400 mcg of chromium, the most of the five bottles.
What are the side effects of Ceylon cinnamon capsules?
Most people have none. The common ones in owner reviews are heartburn, cinnamon burps and an upset stomach when taken without food. Take the capsules in the middle of a meal and split them between breakfast and dinner. Some people are allergic to cinnamon. If you take insulin or a pill like glipizide, cinnamon can add to the effect, so check your meter more often for the first 2 weeks and tell your doctor.
Can I just use cinnamon powder from the spice jar instead of capsules?
Only if the jar says Ceylon, and most do not. A level teaspoon is about 2.6 grams. If it is cassia, that teaspoon holds roughly 7 to 18 mg of coumarin, above the daily limit for a 150-pound adult [4, 5]. A sprinkle on oatmeal is fine. A daily teaspoon of cassia, every day for months, is not. Capsules also let you know the milligrams you took.
Our verdict
If your readings sit in the 200s or your A1c is above 8, cinnamon is not enough, whichever bottle you buy. See your doctor first. And if all you want is 1,200 mg of true Ceylon bark at the lowest price, buy Nutricost at $6.38 a month or NutriFlair at $10.50. They are real Ceylon powder and they cost a third to a half of what Dosera does.
Dosera is for the person who wants the label to answer every question before they open the bottle: the species printed, bark and a 10:1 extract together, chromium in the same capsules, and a coumarin number so the daily intake is a known sum, not a guess. No other bottle here does all four. You pay $9.34 to $16.33 more a month for that. The 30-day money-back guarantee, with nothing to send back, is what makes the price a fair test rather than a leap.
If the label answers the species, the milligrams and the coumarin, you are buying cinnamon. If it does not, you are buying a guess.
#1 of 5 · Dosera
Dosera Ceylon Cinnamon 1,200 mg: the bottle that prints the coumarin number
★ 4.8 from 1,764 reviews on the maker's page
- True Ceylon (Cinnamomum verum) bark 1,000 mg plus 200 mg 10:1 extract and 200 mcg chromium, 2 capsules a day
- Coumarin 0.1% or less printed on the label, lab-tested every batch
- $21.33 a bottle, 60 capsules, 30 days, free US shipping
- 30-day money-back guarantee, nothing to send back
$21.33 a bottlefree US shipping
Check price →Sold direct by Dosera · 30-day money-back guarantee, nothing to send back · free US shipping
Price note: when we last checked, Dosera’s own site showed $21.33 a bottlewith free US shipping. No code needed. If it has changed, the page shows today’s price.
References
Every label fact on this page was read off the maker’s own listing on October 20, 2026. Every study number links to the paper.
- 1.Allen et al., Annals of Family Medicine, 2013: 10 studies, 543 people; fasting blood sugar down 24.6 mg/dL, no clear A1c change
- 2.Ranasinghe et al., Diabetes & Metabolic Syndrome, 2025: 210 adults with type 2 diabetes; Ceylon extract lowered fasting blood sugar and A1c from baseline over 4 months
- 3.Romeo et al., Journal of the Endocrine Society, 2020: prediabetes, 500 mg three times a day for 12 weeks; fasting blood sugar 5 mg/dL better than placebo
- 4.Abraham et al., Molecular Nutrition & Food Research, 2010: coumarin safe daily limit of 0.1 mg per kg body weight; cassia is the main source
- 5.Blahová and Svobodová, The Scientific World Journal, 2012: 60 shop cinnamon samples held 2,650 to 7,017 mg coumarin per kg; the Sri Lankan sample had none
- 6.Wang et al., Journal of Agricultural and Food Chemistry, 2013: Cinnamomum verum bark had only traces of coumarin; all three cassia types had substantial amounts
- 7.ConsumerLab, Key Safety Tips for Cinnamon Users, October 30, 2025: adults should not exceed 7 mg of coumarin a day; Ceylon cinnamon contained much lower levels
- 8.ConsumerLab, Cinnamon Supplements and Spices Review, products tested in 2025, updated April 9, 2026
- 9.FDA, public health alert on ground cinnamon products with elevated lead, 2024 to 2026: spices only, no capsule or supplement listed
- 10.Federal Trade Commission, 2024: final rule banning fake reviews and testimonials
- 11.Leach and Kumar, Cochrane Database of Systematic Reviews, 2012: 10 studies, 577 people; no clear effect on A1c, fasting result inconclusive
- 12.NIH Office of Dietary Supplements, Dietary Supplement Label Database, record 331354: Carlyle Ceylon Cinnamon, Cinnamomum verum bark extract
- 13.Knowler et al., New England Journal of Medicine, 2002: 3,234 people with prediabetes; lifestyle program cut new type 2 diabetes by 58%
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. This page is general information, not medical advice. If you take medicine for blood sugar, are pregnant or breastfeeding, or have a health condition, talk to your doctor before you start a supplement. Brand names belong to their owners; we name them only to compare labels.
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Ceylon cinnamon benefits: 8 claims scored, plus the coumarin numbers
Lowers fasting blood sugar62