If you’ve ever grabbed a jar of cinnamon from the grocery store, chances are it was Cassia, not Ceylon. The two spices look similar and share the same warm flavor profile, but they come from different trees and behave very differently once you start using them regularly.
That distinction matters more than most people realize.
One of these two types contains a compound that can strain your liver at high doses over time. The other is naturally low in it. Knowing which is which can change how you shop for cinnamon supplements.
What Is Cassia Cinnamon?
Cassia is the cinnamon most commonly sold in US supermarkets. It comes from the Cinnamomum cassia tree, native to China and parts of Southeast Asia.
It has a darker reddish-brown color, a thicker and harder bark, and a stronger, more pungent flavor than Ceylon. It’s also significantly cheaper to produce, which is why it dominates the retail spice aisle.
The tradeoff is its coumarin content. Cassia bark naturally contains much higher levels of coumarin, a compound the National Center for Complementary and Integrative Health (NCCIH) notes can be toxic to the liver when consumed in large amounts or over a long period.
What Is Ceylon Cinnamon?
Ceylon cinnamon comes from Cinnamomum verum, sometimes called “true cinnamon,” grown primarily in Sri Lanka. It has a lighter tan color, a softer bark that crumbles more easily, and a milder, slightly sweeter flavor.
The key advantage of Ceylon is its low coumarin content, roughly 250 times lower than Cassia, gram for gram. This makes it the safer option for anyone taking cinnamon regularly, whether as a spice or in supplement form.
Key Differences at a Glance
| Factor | Ceylon Cinnamon | Cassia Cinnamon |
|---|---|---|
| Botanical source | Cinnamomum verum | Cinnamomum cassia |
| Coumarin content | Low | High |
| Flavor | Mild, subtly sweet | Strong, pungent |
| Bark texture | Soft, multi-layered, crumbles easily | Thick, hard, single curl |
| Price | Higher | Lower |
| Availability | Specialty stores, supplements | Common grocery stores |
| Best for daily/long-term use | Yes | Not recommended in high doses |
Why Coumarin Content Matters
Coumarin is a naturally occurring compound found in both types of cinnamon, but at very different concentrations. The European Food Safety Authority (EFSA), via Austria’s AGES food safety agency, has set a tolerable daily intake (TDI) of 0.1 mg of coumarin per kilogram of body weight per day, meaning a 60 kg adult can safely consume around 6 mg of coumarin daily.
Because Cassia can contain significantly more coumarin per gram, regularly consuming large amounts, such as multiple teaspoons a day or high-dose Cassia extract, can approach or exceed this daily limit, raising more safety concerns than the same amount of Ceylon would.
This is one reason supplement brands that use Ceylon cinnamon often highlight it directly on the label. It signals a formulation designed for consistent, longer-term use rather than occasional cooking.
Which One Should You Choose for a Supplement?
If you’re taking cinnamon for its potential effects on blood sugar or metabolic health and plan to use it consistently, Ceylon is generally the better choice. Its low coumarin content makes it more suitable for daily supplementation without the same accumulation concerns tied to Cassia.
Cassia isn’t inherently unsafe in small, occasional amounts, such as sprinkling it on oatmeal a few times a week. The concern arises specifically with concentrated extracts or high daily doses taken over months or years.
If you already have liver concerns or take medications metabolized by the liver, this distinction is worth discussing with your healthcare provider before starting any cinnamon supplement.
FAQs
Is Ceylon cinnamon better than Cassia?
For regular or long-term use, Ceylon is considered the safer option because of its much lower coumarin content. Cassia isn’t inherently harmful in small amounts but carries more risk when used in concentrated supplement form over time.
Can I use Cassia cinnamon every day?
Occasional use in cooking is generally fine for most healthy adults. Daily high-dose use, especially concentrated extracts, is where coumarin exposure becomes a more relevant concern.
How can I tell Ceylon and Cassia apart?
Ceylon has a lighter, tan color and a soft bark made of multiple thin layers that crumble easily. Cassia is darker, reddish-brown, and forms a single thick, hard curl.
Does Ceylon cinnamon taste different from Cassia?
Yes. Ceylon has a milder, slightly sweet and citrusy flavor, while Cassia is stronger, spicier, and more pungent.
Is Ceylon cinnamon more expensive?
Generally, yes. Ceylon is harder to harvest and process, and it’s grown almost exclusively in Sri Lanka, which makes it pricier than mass-produced Cassia.
Should I talk to a doctor before taking a cinnamon supplement?
If you have liver conditions, take medications metabolized by the liver, or are managing diabetes with medication, it’s a good idea to check with your healthcare provider before starting any cinnamon supplement, including Ceylon.
If you’re ready to choose a supplement, see our picks for the best Ceylon cinnamon supplements, all selected for low coumarin content and third-party testing.