Cinnamon is a widely available spice used daily across households, businesses, and industries around the world and serves many purposes apart from cooking. 

The spice is made using the inner barks of the Cinnamomum tree which are dried until they curl into rolls. Cinnamon found in this form is known as cinnamon sticks and quills which are also used to make cinnamon powder once ground. The cinnamon tree grows in well-drained moist soils and the plant reaches a maximum height of 15 meters. It has thick oval-shaped leaves with smooth margins. (1) 

In ancient Egypt, cinnamon was a highly sought-after spice used for embalming and religious practices. It was once more valuable than gold. The spice was also used for religious rites in medieval Europe. Moving on, it was also the most profitable merchandise for the Dutch East India Trade Company. 

When trade became an important source of revenue, spices were considered the most important merchandise, and cinnamon was the most important of it all. 3000 years old evidence of cinnamon trading was found during excavations in Tel Dor, located about 30 kilometers to the south of Haifa, in Israel, suggesting the possibility of the long-range spice trade from the Far East westward having taken place some 3,000 years ago

Despite the vast history and use of cinnamon, not every cinnamon in the market is the same; there are two main types of cinnamon namely Cassia Cinnamon and Ceylon Cinnamon. (2)

違いを知れば楽しみ方も変わる！2つのシナモン

古代から使われてきた歴史を持ち、貴重なスパイスとして扱われていた「シナモン」。現在もお菓子やドリンクなどに利用される親しみのあるスパイスです。

実は、シナモンの名称で流通しているものには主に2種類あります。それは「セイロンシナモン」と「カシア」です。共にクスノキ科ニッケイ属（Cinnamomum）に属し、いずれも紀元前から使われていたスパイスと言われています。今回はこの2つのシナモンについてお話ししたいと思います。

CEYLON CINNAMON

Ceylon Cinnamon aka True cinnamon is native to Sri Lanka and has always been a sought-after commodity in the world of trade and spices. It contains more than 80 chemical components. Cinnamaldehyde is the most essential component that can be found in its bark. Due to its high quality and unique chemical composition, Ceylon Cinnamon is relatively expensive. 

Ceylon cinnamon is lighter brown when compared to cassia cinnamon. The true cinnamon cultivation and processing in Sri Lanka is mainly carried out by smallholders. 

Commercial production of the variety begins 3-4 years after planting. When the time is right, the stems are removed and utilized to prepare cinnamon essential oil for distillation. Pieces of the bark are then removed and placed inside one another to form Ceylon cinnamon quills.

In Sri Lanka, peeling and processing of Ceylon Cinnamon are mainly done by hand using the traditional knowledge and tools, unique to the country.  (3) 

The terroir and the traditional method of peeling add to the unique flavor of Ceylon Cinnamon but the most important characteristic of Ceylon Cinnamon is the absence of high levels of Coumarin in Ceylon Cinnamon. 

While Coumarin provides anti-inflammatory, anticoagulant, antibacterial, antifungal, antiviral, anticancer, antihypertensive, antitubercular, anticonvulsant, anti-adipogenic, antihyperglycemic, antioxidant, and neuroprotective properties to cinnamon, consumption of high levels of Coumarin can lead to Clara cell toxicity and tumors in lungs and liver. 

However, between Ceylon and Cassia Cinnamon, Ceylon has the lowest amount of Coumarin amounting to only 0.004% or 250 times less. 

繊細さが特徴の「セイロンシナモン」

まず1つ目の、「セイロンシナモン（Cinnamomum verum）」。こちらはスリランカ原産で、セイロンはスリランカの旧称です。学名の「verum」はラテン語で「真実の」という意味であり、そのまま読めば「真のシナモン」ということになります。実際、シナモンと言えばスリランカで採られるセイロンシナモンを指す、と言われることも。

セイロンシナモンの見た目は明るい茶色をしており、スティック状の商品は、「外樹皮」または「コルク層」 と呼ばれる一番外側の樹皮を取り除き、「内樹皮」と呼ばれる薄い樹皮を何層にも重ねて丸めながら形を整え、乾燥させて作られます。手で崩せるほど柔らかく、きめ細かく繊細という特徴を持ちます。

その繊細さは香りにも表れており、温かみのあるほのかな甘い香りの中に柑橘系の香りがかすかに漂う品のある香りが特徴で、「森のような香り」と形容されることも。そのため調理の間に香りを失いやすいという性質も持ちます。

CASSIA CINNAMON

Cassia cinnamon is processed the same way as any other cinnamon. The variety is scientifically known as Cinnamon aromaticum or Cinnamon cassia. It is light reddish-brown and has a strong flavor. Cassia is also known as Chinese cinnamon. This is the type of cinnamon that is sold mostly in North America. The variety contains different subspecies such as C.cassia, C.burmani, C.loureirii, and C.tamale. (4) 

The cinnamon variety contains hydroxy chalcone and other similar chemicals that improve insulin sensitivity. It also contains chemicals that activate blood proteins and increase blood sugar uptake. As a result, the consumption of cassia cinnamon might aid the control of diabetes. Although it contains such values, cinnamon fanatics consider cassia cinnamon as a variety of lower quality. It is also cheaper when compared to the prices of other cinnamon varieties. 

見た目も香りも強い「カシア」

一方、2つ目のシナモン「カシア」。こちらは「シナニッケイ（Cinnamomum cassia）」というセイロンシナモンの近縁種であり、「チャイニーズシナモン」と呼ばれることも。中国、インド、ベトナム、インドネシアなどアジアの幅広い地域で生産されており、セイロンシナモンよりも比較的安価であるとされています。ちなみに、アメリカやイギリス、インドでシナモンの名称で流通している商品のほとんどはカシアであると言われています。

セイロンシナモンと近縁種とはいえ、見た目や香りにははっきりとした違いがあります。色は明るい赤茶色、外樹皮は残したまま使われ、スティック状のものはそのまま細く丸めて乾燥させて作られるため、肉厚で木のような質感を持ち、手では崩せないほどの固さです。香りも見た目同様に強く、濃厚な甘さとスパイシーさを特徴としています。

THE DIFFERENCE

Ceylon cinnamon is indigenous to Sri Lanka yet it is now grown in Seychelles, Madagascar, and Northwestern India but 80% of the global demand for Ceylon Cinnamon is fulfilled by Sri Lankan exporters. 

Cassia cinnamon usually occurs wild in the mountains of Southern China. With the increasing demand for an affordable variety of cinnamon, Chinese farmers now cultivate spice in Guangxi and Guangdong provinces. 

Once these two varieties enter the market, they can be identified based on the shape and pattern of the quills. The quills of Ceylon cinnamon are made using the dried inner bark of the stems which are rolled into quills that are less than 0.08 mm of thickness. It has a single spiral curl and it is filled with single short pieces of bark. 

Cassia cinnamon is rolled to the center to make scrolls that have a thickness of 1.5mm. When dried, it forms a double curl and a small bit of a straight bark. Its other long edge spirals towards the opposite direction. 

Ceylon cinnamon is considered to be the most delicate among the major species of cinnamon. Its flavor is more subdued, less bitter, and has a sweet finish. It has a sweet aromatic smell. Whereas, cassia shares a strong, spicy-sweet flavor, and aroma. Its flavor is extremely bitter when compared to true cinnamon. It produces a burning aftertaste once consumed. 

The essential oil produced using the bark of Ceylon cinnamon contains trans-cinnamaldehyde, eugenol, and linalool as its main components. All these components account for 80% of its composition.  The dried stem of the cassia bark contains cinnamaldehyde, cinnamic acid, cinnamyl oil, and coumarin as its components. (5) True cinnamon contains an ultra-low level of coumarin. Coumarin is an aromatic chemical compound that is known to possess hepatotoxic and carcinogenic properties. This is an advantage to the spice variety as such properties can cause illnesses in human beings. (6)

Tau is a substance that builds up in the brain. This can lead to Alzheimer’s disease. Both Ceylon cinnamon and cassia cinnamon contain bioactive compounds that block the formation of this substance in the brain. This is an advantage shared by both varieties. However, cassia cinnamon consumption can sometimes end up with bad news. Consuming large amounts of the variety is considered to be unsafe due to its high composition of coumarin. Topical application of cassia on the skin might also lead to allergic skin reactions. Therefore, both these types of cinnamon are healthy, but Ceylon cinnamon can be considered as a healthier choice. 

The difference between Ceylon and Cassia Cinnamon can be summarised as below;