6 Side Effects of Too Much Cinnamon (2024)

Cinnamon is a widely popular spice. However, if consumed in excess, it may cause side effects due to its coumarin content. In some cases, it can cause liver damage or trigger an allergic reaction.

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

It’s widely popular and has been linked with health benefits like improved blood sugar control and lowering of some risk factors for heart disease

The two main types of cinnamon are:

  • Cassia: Also called “regular” cinnamon, this is the most commonly used type.
  • Ceylon: Known as “true” cinnamon, Ceylon has a lighter and less bitter taste.

Cassia cinnamon is more commonly found in supermarkets, given that it’s much cheaper than Ceylon cinnamon.

While Cassia cinnamon is safe to eat in small to moderate amounts, eating too much may cause health problems because it contains high amounts of a compound called coumarin.

Research has found that eating too much coumarin may harm your liver. Research suggests the limit should be about 0.1 milligrams (mg) per 1 kilogram (kg) or 2.2 pounds (lb) of body weight.

Furthermore, eating too much Cassia cinnamon has been linked to many other side effects.

Here are six possible side effects of eating too much Cassia cinnamon.

Cassia (or regular) cinnamon is a rich source of coumarin. However, research suggests that eating too much coumarin may cause liver toxicity and damage.

Some people have experienced mouth sores from eating products that contain cinnamon flavoring agents. This is called cinnamon stomatitis.

Cinnamon contains cinnamaldehyde, a compound that may trigger an allergic reaction when consumed in large amounts.

Having chronic high blood sugar is a health problem. If left untreated, it may contribute to diabetes, heart disease, and many other health problems.

Cinnamon is well-known for its ability to lower blood sugar. Research has found that the spice can mimic the effects of insulin, a hormone that helps remove sugar from the blood, which can help lower insulin resistance.

However, while eating a bit of cinnamon may help lower your blood sugar, eating too much may cause it to fall too low.

While there’s no research evidence to suggest that this has occurred to anyone who has consumed cinnamon, in theory, it is possible to develop hypoglycemia. This can lead to tiredness, dizziness, and possibly fainting.

People who are most at risk of experiencing low blood sugar are those taking medications for diabetes. This is because cinnamon may enhance the effects of these medications and cause your blood sugar to fall too low.

Eating too much ground cinnamon in a single sitting may cause breathing problems if you accidentally inhale some of it, especially in children.

Since the “cinnamon challenge” has become wildly popular, many have attempted to eat large amounts of dry cinnamon.

This challenge involves eating a tablespoon of dry, ground cinnamon in under a minute without drinking water. While it may sound harmless, the challenge can be very dangerous.

Eating dry cinnamon can irritate your throat and lungs, as well as make you gag or choke. This is because the spice has a fine texture that can make it easy to inhale.

It can also permanently affect the function of your lungs. This is because the lungs cannot break down the fibers in the spice. It may accumulate in the lungs and cause lung inflammation, known as aspiration pneumonia.

If aspiration pneumonia is left untreated, the lungs may become permanently scarred and possibly collapse.

People with asthma or other medical conditions that affect breathing need to be especially careful of accidentally inhaling cinnamon.

Cinnamon is safe to eat in small to moderate amounts with most medications.

However, taking too much may be an issue if you’re taking medication for diabetes, heart disease, or liver disease. This is because cinnamon may interact with those medications, either enhancing their effects or intensifying their side effects.

For example, if you’re taking medications that may affect your liver, such as acetaminophen (Tylenol) or statins, excessive intake of the coumarin in cinnamon may increase the chance of liver damage.

Also, the spice may enhance the effects of diabetes medications and cause your blood sugar to fall too low. It’s important you speak with your doctor if you take these drugs, and cinnamon is a frequent part of your diet.

Cinnamon is generally safe to use in small amounts as a spice.

This mostly applies to Cassia cinnamon because it’s a rich source of coumarin. Conversely, Ceylon cinnamon contains only trace amounts of coumarin.

The coumarin content of ground Cassia cinnamon may range between 0.1–3.5 milligrams (mg) per gram (g) of cinnamon, depending on the consistency of the sample.

According to a guideline set by the European Food Safety Authority (EFSA), the tolerable daily intake of coumarin is about 1.5 mg for an adult weighing 60 kg or 132 pounds (lb). A 2021 study also recommends not going over 0.1 mg/1 kg or 2.2 lb of body weight

In the United States, the US Department of Agriculture suggests that half a teaspoon of cinnamon a day or less is generally safe and may even be beneficial to health.

What does cinnamon do to the body?

As long as you consume it in moderation, cinnamon may help keep you healthy by helping:

  • reduce inflammation
  • protect against heart disease
  • improve insulin sensitivity
  • lower blood sugar
  • lower cholesterol
  • protect against infections

Learn more: 10 evidence-based health benefits of cinnamon.

What are the side effects of cinnamon in pregnancy?

There isn’t much known about the effect on a fetus from consuming cinnamon during pregnancy or nursing. Consuming small amounts probably won’t cause any harm, however. Stick to the recommended 0.1 mg of coumarin per 1 kg or 2.2 lb of body weight or about half a teaspoon a day.

Can you overdose on cinnamon?

There’s no research to suggest you can overdose on cinnamon. The concern with eating too much cinnamon relates to its coumarin content, which in excessive amounts, could increase your chance of liver damage.

Sticking to no more than half a teaspoon daily is also a good idea because different types and brands of cinnamon might have different quantities of coumarin in them.

Cinnamon is a delicious spice linked to many health benefits.

In most cases, eating small amounts of cinnamon won’t cause any harm.

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

While eating too much cinnamon may have some drawbacks, it’s a healthy spice that’s safe to eat in small to moderate amounts. Eating less than the tolerable daily intake is more than enough to provide you with its health benefits.

6 Side Effects of Too Much Cinnamon (2024)

FAQs

What will too much cinnamon do to your body? ›

The concern with eating too much cinnamon relates to its coumarin content, which in excessive amounts, could increase your chance of liver damage. Sticking to no more than half a teaspoon daily is also a good idea because different types and brands of cinnamon might have different quantities of coumarin in them.

How much cinnamon is safe in a day? ›

Because cinnamon is unproven as a treatment, there isn't a set dose. Some experts suggest 1/2 to 1 teaspoon (2-4 grams) of powder a day. Some studies have used between 1 gram and 6 grams of cinnamon. High doses might be toxic.

Is cinnamon safe for your liver? ›

While a very small amount of cinnamon from time-to- time is safe, a teaspoon a day of cassia cinnamon (the most common form) can be dangerous to the liver. This is because cassia cinnamon naturally contains a significant amount of coumarin, a liver toxin and potential carcinogen.

What drugs does cinnamon interact with? ›

Most frequently checked interactions
  • Aspir 81 (aspirin)
  • Aspirin Low Strength (aspirin)
  • Benadryl (diphenhydramine)
  • Calcium 600 D (calcium / vitamin d)
  • CoQ10 (ubiquinone)
  • Crestor (rosuvastatin)
  • Cymbalta (duloxetine)
  • Fish Oil (omega-3 polyunsaturated fatty acids)

Does cinnamon burn belly fat? ›

Cinnamon can boost metabolism, since the body uses more energy to process the spice than it does for other foods. Cinnamon may have an insulin-like action in the body, which is seen in the way sugar is broken down in the body. Cinnamon can also improve body metabolism, targeting the fat deposited in the abdominal area.

Does cinnamon raise blood pressure? ›

Cinnamon

A review of 9 studies including 641 participants showed that taking cinnamon reduced systolic and diastolic blood pressure by an average of 6.2 mm Hg and 3.9 mm Hg, respectively. This effect was stronger when people took cinnamon consistently over 12 weeks. Cinnamon is easy to incorporate into meals.

When not to eat cinnamon? ›

While occasional use in foods is safe for most individuals, consuming large amounts of Cassia cinnamon or taking supplements with this ingredient might be dangerous, especially for children and smaller adults, as well as for individuals who already have liver disease or gastroparesis.

Is liver damage from cinnamon reversible? ›

Coumarin is a flavouring substance which is contained in relatively high concentrations in cinnamon varieties collectively known as "Cassia cinnamon". In especially sensitive persons, even comparatively small quantities of coumarin can cause liver damage, although the effect is usually reversible.

Is it better to take cinnamon in the morning or at night? ›

The advantages of drinking cinnamon tea before bed include supporting a weight loss program and easing sore muscles. Additionally, it promotes digestion of the food consumed during the day, speeds up metabolism, and helps with weight loss. And it continues to function as you restfully sleep the next day.

Who Cannot take cinnamon? ›

According to a report in the June 2015 issue of Pharmacognosy Research, people who take warfarin and other blood-thinning medications should exercise caution when consuming cinnamon, as high levels of coumarin in cinnamon interfere with blood clotting in these individuals.

What organ is cinnamon good for? ›

Cinnamon supplements may benefit overall heart health by improving blood pressure and circulation, and reducing blood lipid levels, like LDL cholesterol. Having high blood pressure and high blood fat levels can increase your risk for heart disease, so taking cinnamon supplements may help reduce cardiovascular risk.

What does cinnamon do for kidneys? ›

The bioactive compounds within cinnamon, such as cinnamaldehyde, cinnamic acid, and cinnamate, can mitigate oxidative stress, inflammation, hyperglycemia, gut dysbiosis, and dyslipidemia, which are common complications in patients with CKD.

Which type of cinnamon is healthiest? ›

All types of cinnamon contain a compound known as coumarin, which is known to be harmful in large amounts. Ceylon cinnamon has much less coumarin than cassia cinnamon. If you are concerned about coumarin, Ceylon cinnamon is a safer option for your spice rack.

Is cinnamon as good as metformin? ›

Our findings suggest that in women with PCOS, cinnamon supplementation causes similar reductions in insulin resistance and testosterone level to that of metformin.

Is McCormick cinnamon cassia or ceylon? ›

McCormick, a more than 125-year-old company, is a trusted name in the food industry that you can count on to deliver a marriage of quality and affordability. Their ground cinnamon is classified as cinnamon cassia, so the flavor profile is much stronger and sweeter than Ceylon cinnamon.

What are the health risks of the cinnamon Challenge? ›

The challenge is difficult and carries substantial health risks because the cinnamon coats and dries the mouth and throat, resulting in coughing, gagging, vomiting, and inhalation of cinnamon, which can in turn lead to throat irritation, breathing difficulties, and risk of pneumonia or a collapsed lung.

What happens when cinnamon gets in your lungs? ›

However, attempts to swallow a large quantity of dry cinnamon carry a real risk of aspiration. At least 30 participants nationwide have required medical attention. Cinnamon inhalation can cause pulmonary inflammation, predisposing airways to epithelial lesions and scarring.

What are the benefits of cinnamon in a woman's body? ›

  • Regulates period cycle. Cinnamon has been found to regulate menstrual cycles by balancing hormones and increasing blood flow to the uterus. ...
  • Improves fertility. ...
  • Reduces PCOS symptoms. ...
  • Helps with weight loss. ...
  • Helps regulate blood sugar levels. ...
  • Boosts immunity. ...
  • Aids digestion. ...
  • Promotes heart health.
Oct 17, 2023

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