Most people think cinnamon is just cinnamon—but there are two very different types: Ceylon cinnamon and Cassia cinnamon. They look similar, taste similar, and are often sold interchangeably, but they’re not the same for health.
If you use cinnamon regularly—especially in tea or supplements—this distinction matters because Cassia contains high levels of coumarin, a compound that can stress the liver in large doses. Ceylon cinnamon contains 250x less coumarin and is safer for daily use.
The Key Difference: Coumarin Levels
Coumarin is a naturally occurring compound. In small amounts it’s harmless, but in large amounts it can be toxic to the liver.
- Cassia cinnamon: 0.4–0.8% coumarin
- Ceylon cinnamon: ~0.004% coumarin
That’s a 250x difference. This is why Ceylon is the preferred cinnamon for daily use in tea or supplements.
Why It Matters for Daily Tea Drinkers
The European Food Safety Authority (EFSA) sets a tolerable daily intake for coumarin at 0.1 mg per kg body weight. For a 150‑lb adult, that’s about 7 mg per day. One teaspoon of Cassia cinnamon can exceed that limit, while Ceylon would require dozens of teaspoons to reach it.
Health Benefits of Cinnamon (Both Types)
Both Ceylon and Cassia offer benefits, including:
- Improved insulin sensitivity
- Reduced fasting blood glucose
- Anti‑inflammatory effects
- Antioxidant support
However, the safety profile of Ceylon makes it the better choice for consistent use.
How to Identify Ceylon vs Cassia
- Ceylon: Thin, papery layers; light brown; delicate flavor
- Cassia: Thick, hard bark; dark reddish‑brown; strong spicy flavor
If the label just says “cinnamon,” it’s almost always Cassia. Look for explicit labeling: “Ceylon” or “Cinnamomum verum.”
When Cassia Is Acceptable
Occasional use in baking or holiday recipes is fine. The risk comes from daily, long‑term use (like in tea or supplements).
Why GLTea‑1 Uses Ceylon Cinnamon
GLTea‑1 uses Ceylon cinnamon because it’s safe for daily consumption and delivers blood‑sugar support without the coumarin risk.
Bottom Line
If you’re using cinnamon regularly, always choose Ceylon. It delivers the same benefits with dramatically lower risk. Cassia is fine for occasional recipes, but not for daily therapeutic use.
Try Ceylon cinnamon in GLTea‑1 →
Evidence Snapshot
Multiple reviews confirm cinnamon’s effect on glucose metabolism. Ceylon’s advantage is safety: it allows daily use without exceeding coumarin limits. For anyone building a daily tea routine, this is the responsible choice.
Common Mistakes
- Assuming all cinnamon is the same
- Using Cassia daily in tea or supplements
- Ignoring coumarin limits
Practical Buying Tips
- Look for “Ceylon” on the label
- Prefer sticks over ground for freshness
- Store in an airtight container away from heat
FAQ
Is Ceylon cinnamon more expensive?
Yes, typically 2–3x more. The safety benefits for daily use justify the cost.
Can I mix both types?
If you use Cassia occasionally and Ceylon regularly, that’s fine. The key is to avoid daily high‑dose Cassia.
Evidence Snapshot
Multiple reviews confirm cinnamon’s effect on glucose metabolism. Ceylon’s advantage is safety: it allows daily use without exceeding coumarin limits. For anyone building a daily tea routine, this is the responsible choice.
Common Mistakes
- Assuming all cinnamon is the same
- Using Cassia daily in tea or supplements
- Ignoring coumarin limits
Practical Buying Tips
- Look for “Ceylon” on the label
- Prefer sticks over ground for freshness
- Store in an airtight container away from heat
FAQ
Is Ceylon cinnamon more expensive?
Yes, typically 2–3x more. The safety benefits for daily use justify the cost.
Can I mix both types?
If you use Cassia occasionally and Ceylon regularly, that’s fine. The key is to avoid daily high‑dose Cassia.
Evidence Snapshot
Multiple reviews confirm cinnamon’s effect on glucose metabolism. Ceylon’s advantage is safety: it allows daily use without exceeding coumarin limits. For anyone building a daily tea routine, this is the responsible choice.
Common Mistakes
- Assuming all cinnamon is the same
- Using Cassia daily in tea or supplements
- Ignoring coumarin limits
Practical Buying Tips
- Look for “Ceylon” on the label
- Prefer sticks over ground for freshness
- Store in an airtight container away from heat
FAQ
Is Ceylon cinnamon more expensive?
Yes, typically 2–3x more. The safety benefits for daily use justify the cost.
Can I mix both types?
If you use Cassia occasionally and Ceylon regularly, that’s fine. The key is to avoid daily high‑dose Cassia.
Evidence Snapshot
Multiple reviews confirm cinnamon’s effect on glucose metabolism. Ceylon’s advantage is safety: it allows daily use without exceeding coumarin limits. For anyone building a daily tea routine, this is the responsible choice.
Common Mistakes
- Assuming all cinnamon is the same
- Using Cassia daily in tea or supplements
- Ignoring coumarin limits
Practical Buying Tips
- Look for “Ceylon” on the label
- Prefer sticks over ground for freshness
- Store in an airtight container away from heat
FAQ
Is Ceylon cinnamon more expensive?
Yes, typically 2–3x more. The safety benefits for daily use justify the cost.
Can I mix both types?
If you use Cassia occasionally and Ceylon regularly, that’s fine. The key is to avoid daily high‑dose Cassia.
Evidence Snapshot
Multiple reviews confirm cinnamon’s effect on glucose metabolism. Ceylon’s advantage is safety: it allows daily use without exceeding coumarin limits. For anyone building a daily tea routine, this is the responsible choice.
Common Mistakes
- Assuming all cinnamon is the same
- Using Cassia daily in tea or supplements
- Ignoring coumarin limits
Practical Buying Tips
- Look for “Ceylon” on the label
- Prefer sticks over ground for freshness
- Store in an airtight container away from heat
FAQ
Is Ceylon cinnamon more expensive?
Yes, typically 2–3x more. The safety benefits for daily use justify the cost.
Can I mix both types?
If you use Cassia occasionally and Ceylon regularly, that’s fine. The key is to avoid daily high‑dose Cassia.
Evidence Snapshot
Multiple reviews confirm cinnamon’s effect on glucose metabolism. Ceylon’s advantage is safety: it allows daily use without exceeding coumarin limits. For anyone building a daily tea routine, this is the responsible choice.
Common Mistakes
- Assuming all cinnamon is the same
- Using Cassia daily in tea or supplements
- Ignoring coumarin limits
Practical Buying Tips
- Look for “Ceylon” on the label
- Prefer sticks over ground for freshness
- Store in an airtight container away from heat
FAQ
Is Ceylon cinnamon more expensive?
Yes, typically 2–3x more. The safety benefits for daily use justify the cost.
Can I mix both types?
If you use Cassia occasionally and Ceylon regularly, that’s fine. The key is to avoid daily high‑dose Cassia.
Evidence Snapshot
Multiple reviews confirm cinnamon’s effect on glucose metabolism. Ceylon’s advantage is safety: it allows daily use without exceeding coumarin limits. For anyone building a daily tea routine, this is the responsible choice.
Common Mistakes
- Assuming all cinnamon is the same
- Using Cassia daily in tea or supplements
- Ignoring coumarin limits
Practical Buying Tips
- Look for “Ceylon” on the label
- Prefer sticks over ground for freshness
- Store in an airtight container away from heat
FAQ
Is Ceylon cinnamon more expensive?
Yes, typically 2–3x more. The safety benefits for daily use justify the cost.
Can I mix both types?
If you use Cassia occasionally and Ceylon regularly, that’s fine. The key is to avoid daily high‑dose Cassia.
The Bottom Line on Cinnamon
Not all cinnamon is created equal — and for daily use, the difference genuinely matters. Cassia cinnamon is fine as an occasional spice, but when you are consuming it every day in a functional tea or supplement, Ceylon is the only responsible choice. Lower coumarin, superior insulin-sensitizing effects, and centuries of safe traditional use back it up.
In GLTea-1, we use Ceylon cinnamon specifically because we designed this tea for daily, consistent use. We are not interested in shortcuts that compromise long-term safety. Every cup should support your health — not quietly undermine it. That is the Sip Lab standard.
