Written by Ryan Raman, MS, RD — medically reviewed through Atli Arnarson BSc, phd — to update on September 26, 2019

Cinnamon is a spice made from the inner bark of the Cinnamomum tree.

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It’s widely popular and also has been attached with wellness benefits like enhanced blood sugar control and also lowering of part risk factors for heart condition (1, 2).

The 2 main species of cinnamon are:

Cassia: likewise called “regular” cinnamon, this is the most typically used type.Ceylon: well-known as “true” cinnamon, Ceylon has a lighter and also less bitter taste.

Cassia cinnamon is an ext commonly uncovered in supermarkets, offered that it’s much cheaper 보다 Ceylon cinnamon.

While Cassia cinnamon is for sure to eat in little to middle amounts, eat too lot may cause health problems since it consists of high quantities of a compound referred to as coumarin.

Research has discovered that eating too lot coumarin may damage your liver and also increase the threat of cancer (3, 4, 5).

Furthermore, eating too lot Cassia cinnamon has been linked to numerous other side effects.

Here are 6 possible side results of eat too lot Cassia cinnamon.


1. May cause Liver Damage

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Cassia (or regular) cinnamon is a rich source of coumarin.

The coumarin contents of ground Cassia cinnamon may range from 7 to 18 milligrams per teaspoon (2.6 grams), when Ceylon cinnamon only contains trace amounts of coumarin (6).

The tolerable everyday intake the coumarin is approximately 0.05 mg/pound (0.1 mg/kg) of human body weight, or 5 mg per day for a 130-pound (59-kg) person. This method that simply 1 teaspoon of Cassia cinnamon could put you over the day-to-day limit (3).

Unfortunately, numerous studies have discovered that eating too lot coumarin may cause liver toxicity and damage (4, 5).

For example, a 73-year-old woman developed a sudden liver infection leading to liver damages after taking cinnamon additional for just 1 main (7). However, this case connected supplements that listed a higher dose 보다 you would obtain from diet alone.

Summary continuous cinnamon consists of high amounts of coumarin. Researches have presented that eat too much coumarin may increase the danger of liver toxicity and also damage.
2. May boost the danger of Cancer

Animal research studies have presented that eating too much coumarin, which is numerous in Cassia cinnamon, may rise the danger of certain cancers (3).

For example, research studies in rodents have found that eating too lot coumarin can reason cancerous tumors to build in the lungs, liver, and also kidneys (8, 9, 10).

The means in i beg your pardon coumarin may cause tumors is unclear.

However, part scientists think that coumarin reasons DNA damage over time, boosting the risk of cancer (11).

Most research study on the cancerous effects of coumarin has been perform on animals. Much more human-based study is necessary to view if the exact same link between cancer and coumarin applies to humans.

Summary animal studies have found that coumarin may increase the threat of certain cancers. However, an ext research is necessary to identify whether this additionally applies come humans.
3. May cause Mouth Sores

Some people have skilled mouth sores indigenous eating commodities that save cinnamon flavoring agents (12, 13, 14).

Cinnamon includes cinnamaldehyde, a compound that may trigger an allergy reaction as soon as consumed in big amounts. Little amounts that the spice nothing seem to reason this reaction, together saliva prevents chemicals from continuing to be in call with the mouth for too long.

In addition to mouth sores, other symptoms of a cinnamaldehyde allergy include:

tongue or gum swelling a burn or itching emotion white spot in the mouth

While this symptoms aren’t necessarily serious, they can cause discomfort (14).

However, it’s essential to keep in mind that cinnamaldehyde will certainly only reason mouth sores if you’re allergic to it. You can acquire tested for this form of allergy with a skin patch test (15).

Also, mouth sores seem to mostly affect those who use too lot cinnamon oil and also cinnamon-flavored chewing gums, as these products can contain more cinnamaldehyde.

Summary Some civilization are allergy to a compound in cinnamon referred to as cinnamaldehyde, i m sorry can reason mouth sores. However, this appears to mostly impact people who usage too much cinnamon oil or chewing gum, as these assets contain much more cinnamaldehyde.
4. May cause Low Blood Sugar

Having chronic high blood street is a wellness problem. If left untreated, the may bring about diabetes, heart disease, and many various other health difficulties (16).

Cinnamon is renowned for its capability to reduced blood sugar. Research studies have uncovered that the spice have the right to mimic the effects of insulin, a hormone the helps eliminate sugar indigenous the blood (17, 18, 19).

While eat a little of cinnamon may assist lower her blood sugar, eat too lot may cause it to fall too low. This is referred to as hypoglycemia. It deserve to lead to tiredness, dizziness, and also possibly fainting (20).

People that are many at hazard of experiencing low blood sugar are those taking medications for diabetes. This is due to the fact that cinnamon may improve the effects of these medications and cause her blood sugar to loss too low.

Summary While eating cinnamon may assist lower her blood sugar, eat too lot may cause it to fall too low, specifically if you on medication because that diabetes. Common symptoms of short blood sugar room tiredness, dizziness, and also fainting.

Eating too lot ground cinnamon in a single sitting may cause breathing problems.

This is since the spice has actually a fine structure that have the right to make it straightforward to inhale. Coincidentally inhaling it deserve to cause:

coughinggagging difficulty when do the efforts to record your breath

Also, the cinnamaldehyde in cinnamon is a neck irritant. That may reason further breathing difficulties (21).

People with asthma or various other medical problems that affect breathing have to be especially mindful of by chance inhaling cinnamon, together they are much more likely to experience trouble breathing.

Summary eating too much ground cinnamon in a single sitting may reason breathing problems. The fine texture of the spice provides it easy to inhale and irritate the throat, i m sorry may reason coughing, gagging, and trouble recording your breath.

Cinnamon is safe to eat in tiny to moderate amounts with many medications.

However, taking too much may be an problem if you’re taking medication for diabetes, love disease, or liver disease. This is due to the fact that cinnamon may connect with those medications, either enhancing their results or intensifying their side effects.

For example, Cassia cinnamon contains high amounts of coumarin, i m sorry can reason liver toxicity and also damage if consumed in high amounts (3, 4, 5).

If you’re taking drugs that may impact your liver, such together paracetamol, acetaminophen, and statins, extreme intake that cinnamon may rise the chance of liver damage (7).

Also, cinnamon may help lower her blood sugar, therefore if she taking drugs for diabetes, the summer sprouts may boost their effects and also cause her blood sugar to loss too low.

Summary If consumed in big amounts, cinnamon may communicate with medications for diabetes, heart disease, and liver disease. It might either enhance their effects or boost their next effects.

Since the “cinnamon challenge” has end up being wildly popular, numerous have attempted to eat large amounts of dry cinnamon.

This difficulty involves eating a tablespoon of dry, ground cinnamon in under a minute there is no drinking water (22).

While it may sound harmless, the an obstacle can be an extremely dangerous.

Eating dry cinnamon have the right to irritate your throat and lungs, and also make friend gag or choke. It can also permanently damages your lungs.

This is because the lungs cannot malfunction the fibers in the spice. It might accumulate in the lungs and also cause lung inflammation recognized as aspiration pneumonia (23, 24).

If aspiration pneumonia is left untreated, the lungs may end up being permanently scarred and possibly fallen (24).

Summary when eating large amounts of dry cinnamon could seem harmless, it deserve to be very dangerous. If cinnamon reaches your lungs, it can not be damaged down and also may cause an infection and also permanent lung damage.

Cinnamon is typically safe to use in tiny amounts together a spice. It’s attached to countless impressive health and wellness benefits.

However, eating too lot may cause potentially dangerous next effects.

This mostly uses to Cassia cinnamon because it’s a rich source of coumarin. Whereas Ceylon cinnamon consists of only trace amounts of coumarin.

The tolerable everyday intake for coumarin is 0.05 mg per lb (0.1 mg per kg) of body weight. This is just how much coumarin you can eat in a day without the threat of side results (3).

This converts up come 8 mg of coumarin per day for an adult weighing 178 pounds (81 kilograms). For reference, the amount of coumarin in 1 tespoon (2.5 grams) of floor Cassia cinnamon ranges from 7 to 18 mg (6). Store in mind that youngsters may tolerate also less.

Although Ceylon cinnamon has only trace amounts of coumarin, excessive intake must be avoided. Cinnamon consists of numerous other plant compounds the may have actually adverse impacts when spend in high amounts. Usage all cinnamon sparingly as a spice.

Summary Adults have to avoid eating much more than 1 teaspoon of Cassia cinnamon per day. Children may tolerate even less.

Cinnamon is a delicious spice, attached to plenty of health benefits.

While eating small to moderate amounts is safe, eat too lot may reason side effects. This mostly uses to Cassia or “regular” cinnamon due to the fact that it has high amounts of coumarin, which has been linked to problems like liver damage and cancer.

On the other hand, Ceylon or “true” cinnamon only consists of trace amounts of coumarin.

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While eat too lot cinnamon may have actually some drawbacks, it’s a healthy spice that’s for sure to eat in little to center amounts. Eating less than the tolerable day-to-day intake is much more than enough to carry out you with its health and wellness benefits.