If you've ever taken the time to look for natural methods of supporting normal blood sugar levels, you'll have come across cinnamon more than once. However, not all types of cinnamon are identical even when they have different names, and this difference is important if you're interested in using Ceylon cinnamon for aiding diabetes. The soft, papery quills grown in the southern coastal area of Sri Lanka differ chemically from the thick, reddish-brown cassia bark which is available in the majority of supermarket spice jars, and it is precisely because of this distinction that researchers keep returning to it.
The article examines what has actually been researched, explains the differences between Ceylon cinnamon and cassia in terms that are relevant for everyday use, describes how Ceylon cinnamon is grown and graded in Sri Lanka, and tells you how to buy and use it if you wish to include it in your routine. Of course, this does not take the place of medical advice — it should instead provide you with a clearer and more reliable understanding than much of what you find when doing a quick search.
Why the difference between Ceylon cinnamon and cassia cinnamon matters for people with diabetes
The majority of the 'cinnamon' sold all over the world, particularly in North America, is cassia, a less expensive bark obtained from a tree that is different but related to the cinnamon tree and which is mainly native to China and Indonesia. Ceylon cinnamon, known as Cinnamomum verum, is originally from Sri Lanka and has for centuries been cultivated along the southwestern coast of the island. In appearance, the quills of Ceylon cinnamon are thin, light tan in colour and consist of a number of fine layers rolled together, almost as if they were a cigar. In contrast, cassia sticks are simple, thick curls of dark bark.
The reason why cinnamon is of health concern is that it contains coumarin, a substance that occurs naturally and can place a strain on the liver when taken in high amounts over a long period. Cassia cinnamon may have coumarin levels ranging from 1 to 5 per cent, whereas Ceylon cinnamon usually has levels well below 0.1 per cent—often quoted as about 0.004 per cent—representing a difference of more than a hundred times. This is the reason why most of the research focusing on the use of cinnamon on a daily basis to help with blood sugar levels uses Ceylon cinnamon rather than cassia: it is the type that you can safely consume every day without having to worry about coumarin accumulating in your body.
That is also why people search specifically for "Ceylon cinnamon and diabetes" rather than simply "cinnamon and diabetes"; the active ingredients—cinnamaldehyde, procyanidins, and the related polyphenols—are found in both kinds, but only one of them is appropriate for continuous daily use.
What the Research Actually Says
The straightforward reply is that cinnamon does help, though it can't take the place of treatment. In the past twenty years a number of clinical studies have examined the effect of cinnamon on fasting blood glucose in people who have type 2 diabetes, the outcome varying from small to fairly considerable depending on the dose, the length of time and the kind of cinnamon used.
A recent and thorough study was carried out in Sri Lanka. Researchers from the Clinical Trials Unit at the University of Kelaniya, in collaboration with RemediumOne and Dr Dimuthu Muthukuda, a consultant endocrinologist at Sri Jayewardenepura General Hospital, conducted the study using a standardised Ceylon cinnamon extract. The results showed that Ceylon cinnamon significantly reduced blood sugar in patients with type 2 diabetes over 12 weeks compared with a group that did not take it. Those who took the extract daily had lower fasting blood sugar over the 12-week period, and the extract appeared to reduce LDL cholesterol, although that effect was not statistically significant during the trial. No adverse effects were noted, and the trial was considered larger and better designed than previous studies in this area.
Similar findings have been reported in other published research. Some research suggests that consuming Ceylon cinnamon regularly —typically between half a teaspoon and just over a teaspoon each day—might slightly improve insulin sensitivity and reduce the rate at which sugar moves from the gut into the bloodstream after a meal, thereby lessening the rise in blood sugar after eating. This is why people ask whether Ceylon cinnamon benefits diabetes: it does not lower blood sugar directly as medications do, but instead affects digestion and the body's insulin response to a small degree.
The research does not back the idea of using cinnamon as a cure or as a replacement for prescribed diabetes medication. The effect sizes found in the various studies differ greatly, since some of the trials show only a small or no benefit, and cinnamon can interact with drugs such as metformin or insulin — combinations that might cause blood sugar levels to fall below the desired range. So people who are on diabetes medication should consult their doctor before taking cinnamon in any significant amount, especially if it is in extract or capsule form rather than as a spice used in cooking.
Practical Ways to Add It to Your Diet
For the vast majority of people who use Ceylon cinnamon as a food rather than a supplement, the matter is simple. It is quite reasonable to make a cinnamon stick by steeping it in hot water or tea, to mix in half a teaspoon with oatmeal, or to lightly dust it over roasted vegetables or coffee, all of which offer regular but small amounts without requiring any serious thought. Ground Ceylon cinnamon also works well in baking since it is milder and sweeter than cassia and therefore recipes often require a bit more to achieve the same level of flavour.
If you intend to use it as part of a blood sugar routine rather than merely for flavour, then consistency is more important than the amount. It's better to take a small amount each day and include it in the meals you're already eating than to have occasional large doses. Since Ceylon cinnamon has such a low coumarin content, you can use it on a daily basis to a greater extent than you can with cassia — but 'low coumarin' does not mean that you can use it without limits, and anyone who is pregnant, on blood thinners, or managing a liver condition should consult a doctor before making it a daily habit.
Choosing the Best Ceylon Cinnamon for Diabetes-Friendly Use
A shelf containing bags marked 'Ceylon cinnamon' does not necessarily have 100 percent Cinnamomum verum, since true cinnamon is more expensive to grow and process than cassia and blending or mislabeling therefore occurs more frequently than many buyers know, particularly in the case of pre-ground powder where the visual differences vanish.
A few things separate genuine, higher-grade Ceylon cinnamon from the rest:
– Origin and traceability. True Ceylon cinnamon is almost entirely grown in the southwestern coastal region of Sri Lanka – for example, in the districts of Galle, Matara and certain areas of Kalutara – a region which is generally known as the Cinnamon Coast. The fact that the source identifies where the cinnamon is grown is a positive sign.
- Grading. The official grading system used in Sri Lanka classifies quills according to their diameter into four types: Alba, Continental, Mexican, and Hamburg, where the Alba grade, which is less than 6mm in diameter, is considered the best and thinnest. Reliable exporters will specify the grade you receive rather than simply calling it 'premium'.
- As for texture and colour, the whole Ceylon quills are light tan and consist of a number of thin, overlapping layers, while the cassia sticks are a single thick curl and considerably darker.
- Certifications. It is reasonable to request from a supplier certification that a product is organic, test results showing the coumarin levels, and documents proving compliance with export regulations, especially when buying in bulk or as a business buyer.
If someone is buying the product specifically with a view to supporting their blood sugar levels, they will usually feel more confident using whole quills or freshly ground powder from a supplier who is able to confirm the growing region and the grade than they will by taking one from an unlabelled jar in the ordinary spice section.
From Tree to Bark: How It's Grown and Processed in Sri Lanka
In Sri Lanka, cinnamon is still harvested almost entirely by hand, a practice families have passed down from generation to generation. The young shoots, which are generally two or three years old, are cut, and the outer bark is scraped off, after which a 'peeler' — a position that usually demands many years of training — carefully removes the thin bark. Workers then nest smaller strips with a special curved leaf theme. The smaller strips are placed inside the larger ones and left to dry, during which time the bark curls into the well-known rolled quill shape as it loses moisture over several days.
It's hard work, and this is one of the main reasons genuine Ceylon cinnamon costs more than mass-produced cassia. After drying, the quills are sorted by diameter into various grades, checked for consistency, and then packed for export. At Zesty Taprobane, we work directly with growers in this coastal area and conduct grading and quality inspections before the spices are packed for export; for this reason, we can provide specific information about origin and grade rather than relying on general marketing statements. The current range of spices, including the different cinnamon grades, is available on our products page.
Storing Ceylon Cinnamon to Keep It Effective
The beneficial compounds in cinnamon together with its taste break down when exposed to light, heat, and air; whole quills are considerably more satisfactory over a period of time than pre-ground powder because grinding exposes a much larger surface area to oxidation. Cinnamon sticks, if bought regularly, can remain effective for a year or longer when kept in a sealed container and stored away from direct sunlight and stove heat, whereas ground cinnamon should be used within a few months.
To get fresher flavour and likely retain more of the active compounds researchers have been studying, grind small batches as needed using a spice grinder or a mortar and pestle.
The Bottom Line
Ceylon cinnamon is not a wonder spice, and it's an overstatement to say it can replace insulin or metformin. However, the research—including a well-designed clinical trial carried out in Sri Lanka and published in PLoS ONE—does indicate a genuine but small effect on fasting blood sugar when the spice is used regularly and comes from the right source. Since it contains considerably less coumarin than cassia, it can be a sensible, low-risk addition to a diet for people concerned about diabetes—provided it is used as a supplement to medical treatment, not a replacement.
If you are buying in large quantities for a health food business, a café, or a supplement range and would like cinnamon that has a verified origin and grading, our team will be able to guide you through the options available on the wholesale inquiry page.
Frequently Asked Questions
Is Ceylon cinnamon really beneficial for diabetes?
Research suggests it can offer a small advantage in fasting blood sugar and insulin sensitivity with regular use, as shown in a recent clinical trial in Sri Lanka published in PLoS ONE. Nevertheless, it is not a treatment by itself—it works most effectively in combination with the medications that your doctor has already prescribed, not in place of them.
How much Ceylon cinnamon should I take each day?
The majority of the research which demonstrated benefits involved the use of between half a teaspoon and just over a teaspoon of Ceylon cinnamon powder each day; there's no point in taking more than this amount, and people who are on diabetes medication should first ask their doctor since cinnamon may enhance the effect of some drugs on lowering blood sugar.
How can I work out whether the cinnamon in question is genuine Ceylon cinnamon or cassia?
If you can see the stalks, Ceylon quills are thin, light tan, and made of several rolled layers, whereas cassia is a single thick, dark curl. With ground cinnamon, you have to trust the supplier's claims about where it comes from, so your best option is to buy from someone who can confirm the growing area and grade.
Can I obtain Ceylon cinnamon in bulk for my business?
Certainly. We do business with cafés, health food stores, and supplement companies for bulk orders with confirmed origins and grading. If you'd like to get in touch, please use our wholesale inquiry page, and our team will go over volumes, grades, and lead times with you.
Does Ceylon cinnamon interact with medication for diabetes?
It can. Cinnamon might strengthen the blood-sugar-lowering effect of drugs such as metformin or insulin, which in rare instances could cause levels to drop below the desired amount. This isn't a sufficient reason to avoid cinnamon completely, but it is a valid reason to tell your doctor if you use it in any significant daily quantity.
What is the difference between Alba and the other grades of cinnamon?
Alba is the best and most slender grade, made from quills under 6mm in diameter; the grades that follow are Continental, Mexican, and then Hamburg as the diameter gets larger. Alba generally has a milder, sweeter taste and is therefore often used in high-end culinary contexts, even though the lower grades are just as suitable for everyday cooking or making tea.
What is the correct way to store Ceylon cinnamon so it stays fresh?
Whole quills last for a year or more when stored in a sealed container and kept away from both heat and light. If you use cinnamon often, it is better to grind small quantities as needed rather than buy large amounts of pre-ground powder, since this gives better flavour and likely provides more of the compounds researchers have studied.
Are you able to ship Ceylon cinnamon to international destinations?
We export to customers and businesses worldwide. Should you have any questions concerning shipping to your country, the minimum order quantities, or the documentation needed for import, our team will be able to assist you—all you have to do is get in touch via the contact page.