Cinnamon

True Ceylon bark — the botany, the aroma, and the coumarin question

All articles checked for accuracy against the GB NHC Register and all sources have citations with verified links to their relevant studies.

Cinnamon on supermarket shelves is often two very different barks sold under one name. WellsparQ uses true Ceylon cinnamon and this article explains the botanical difference, the coumarin safety issue, and how the evidence stacks up.

This piece covers what Ceylon (true) and cassia cinnamon are, which compounds matter for safety and flavour, why WellsparQ specifies Ceylon, how we measure and declare it in products, and what the scientific evidence actually shows — described as research, not as product benefits.

Ingredient Snapshot

What it is

Dried inner bark spice used for its warm aroma and flavour.

Where from

True Ceylon cinnamon — Cinnamomum verum (Sri Lanka).

Known for

Contains cinnamaldehyde-rich essential oil and low levels of coumarin compared with cassia.

In WellsparQ

• KinetiHerb399 mg
• PhytoPulse300 mg
• BacoPanax Complex300 mg
• GutHerb Plus100 mg
• CapryGuard Complex15 mg
• Mannose Max10 mg

Cinnamon is one of the oldest traded spices in the world, and one of the most misunderstood — because "cinnamon" is really two different barks sold under one name. The distinction matters for flavour, and it matters for safety. WellsparQ uses true Ceylon cinnamon throughout, and this page explains why that choice is deliberate, what the research on cinnamon actually says, and where the regulatory line sits.

Two barks, one name

Cinnamon is the dried inner bark of trees in the genus Cinnamomum. The two you will meet in commerce are:

• Ceylon, or "true", cinnamon — Cinnamomum verum (synonym C. zeylanicum), native to Sri Lanka. Pale, brittle, made of thin, tightly rolled layers; delicate and sweet.
• Cassia cinnamon — chiefly Cinnamomum cassia (Chinese cinnamon) and related species. Darker, harder, a single thick layer; stronger and more pungent. Most of the "cinnamon" on the world market is cassia ^¹².

They look, taste and — crucially — compose differently. The single most important difference for a supplement is a compound called coumarin, covered below.

What's in the bark

The warm, familiar smell of cinnamon comes mainly from its essential oil, and the dominant compound in bark oil is cinnamaldehyde, which typically makes up a large share — often more than half, and in some analyses of Ceylon bark oil around 50–70% ^³. Eugenol and other aromatics make up much of the rest. Cinnamon also contains polyphenols and procyanidins, which is where much of the research interest has focused.

The coumarin question — why Ceylon

This is the genuine, reputable-evidence reason we specify Ceylon. Coumarin is a naturally occurring plant compound. In sensitive individuals, high intakes can cause liver effects, which are usually reversible ^¹. On that basis the European Food Safety Authority established a Tolerable Daily Intake (TDI) for coumarin of 0.1 mg per kg of body weight per day (first set in 2004, and maintained after re-evaluation in 2008) ^⁴. For a 60 kg adult, that works out at roughly 6 mg of coumarin a day.

Here is the crux: cassia cinnamon can contain substantial coumarin, while Ceylon cinnamon contains very little ^¹². Germany's Federal Institute for Risk Assessment (BfR) has assessed this directly and advises that cassia be consumed in moderation, and that people using large amounts of cinnamon — including in food supplements — favour Ceylon, which is low in coumarin and which the BfR considers safe in this respect ^¹. The BfR also notes that coumarin within the cinnamon "matrix" is absorbed by the body much like isolated coumarin, so the form in the spice is not somehow protected ^¹.

For a brand that puts cinnamon into daily supplements, that settles the sourcing question. Using true Ceylon bark keeps coumarin exposure low by design — the responsible choice when a compound is taken habitually, not just sprinkled on a bun.

How WellsparQ measures it

Every WellsparQ cinnamon is Ceylon cinnamon bark (Cinnamomum zeylanicum / verum), declared by weight, never unspecified "cinnamon" of unknown species.

Source: WellsparQ Supplements Database. Specifying the species is not a marketing flourish; it is the safety-relevant fact.

What the research shows — as evidence, not a promise

Cinnamon is best known in popular writing for blood-sugar research, so it is worth being precise about what the evidence supports. Trials and meta-analyses of cinnamon in glucose metabolism exist, but they are inconsistent and generally of limited quality. A Cochrane systematic review (Leach & Kumar, 2012) concluded there was insufficient evidence to support the use of cinnamon for type 1 or type 2 diabetes, finding it no more effective than placebo, other treatments or no treatment for lowering glucose or HbA1c, and noting that the underlying studies were often poorly conducted ^⁵. Some later meta-analyses have reported modest reductions in fasting glucose, but with high variability between studies ^⁶. Taken together, this is an open, unsettled research area — interesting, not conclusive.

Regulators have reached the matching conclusion. No cinnamon health claim is authorised under the retained EU health-claims framework — cinnamon/blood-glucose claims were not authorised by EFSA ^⁷. So we discuss the research here strictly as research, with its limitations, and we make no benefit claim in WellsparQ voice.

Safety and sensible use

Choosing Ceylon keeps coumarin low, but sensible limits still apply, and cinnamon is a potent spice. Concentrated cinnamon products are not suitable for everyone: anyone pregnant or breastfeeding, taking medication (including diabetes or blood-thinning medicines), or managing a liver condition should speak to a GP or pharmacist before use, and should keep to the stated dose. Cinnamon is a supporting ingredient in a considered blend — not a treatment.

Where it fits your day

Cinnamon is heritage and aroma, chosen with care: true Ceylon bark, named by species, weighed to the milligram, and kept honest about what the evidence does and does not show. Rooted in nature. Backed by research. Told straight.