Cinnamon Essential Oil Benefits, Uses & Safety

QUICK SUMMARY

Cinnamon essential oil is one of the strongest antibacterial and antifungal oils there is, and it supports healthy blood sugar, digestion, and the immune system. Cinnamon lowers blood sugar in people: a 2025 meta-analysis of 28 trials and 3,054 adults with type 2 diabetes found it cut fasting glucose by about 15 mg/dL. (1)

Use it in a diffuser, in household cleaners, and in tested food and body recipes. It is a hot oil, so never use it undiluted, and keep cinnamon bark oil at 0.1 percent or less in everyday lotions and body oils.

Cinnamon essential oil benefits the body in so many ways that you may be surprised that this warm, spicy, fragrant oil is also a powerful remedy. And like all powerful remedies, it needs to be respected so it doesn’t sensitize or irritate your skin.

From antimicrobial cleaning blends and oral care to blood sugar, gut health, and cancer research, here is what cinnamon oil can do and how we use it at home.

Top 5 Cinnamon Essential Oil Benefits

Cinnamon bark oil is rich in cinnamaldehyde and cinnamon leaf oil in eugenol, and we’ll note where one is preferred over the other.

1. Powerful Antibacterial Activity

Cinnamon essential oil is famous for its antibacterial power, and researchers keep confirming it. A 2024 study found that cinnamon oil and cinnamaldehyde stopped Pseudomonas and four other common bacteria in the lab, and in tiny worms infected with Pseudomonas aeruginosa both treatments reduced the bacteria and helped the worms live longer. (2) A 2024 review of the research describes the same strong antibacterial action across hundreds of laboratory studies. (3)

It works in the mouth, too. In a 2023 study, a mouth rinse made with cinnamon oil and grapefruit seed extract reduced cavity-causing bacteria in people, and encapsulating the oils made the effect stronger and longer lasting. (4)

Application: Use cinnamon oil in household cleaners, room sprays, diffuser blends, and oral-care recipes that give exact amounts. Cinnamon bark essential oil is a key ingredient in our immune boosting recipe.

2. Healthy Blood Sugar

The human research on cinnamon and blood sugar is strong. A 2025 meta-analysis of 28 randomized trials in 3,054 adults with type 2 diabetes found that cinnamon lowered fasting blood sugar by about 15 mg/dL, after-meal blood sugar by about 39 mg/dL, and A1C by about half a point. (1) A 2024 analysis of 24 trials agreed, adding a drop in insulin resistance. (5)

You do not need large doses to see it. In a 2024 trial, 18 adults with prediabetes took 4 grams of cinnamon a day, about a teaspoon and a half, for four weeks while wearing glucose monitors, and their 24-hour blood sugar was significantly lower than on placebo. (6)

Those trials used ground cinnamon and cinnamon capsules. The essential oil concentrates cinnamaldehyde, the compound that laboratory and animal research credits with improving insulin signaling and glucose uptake. (3) As we wrote in The Essential Oils Apothecary, “Be sure to monitor your blood sugar carefully when using cinnamon in any form, and consult with your doctor before adjusting medication. Your body might just respond a little too well to cinnamon’s strengths.”

Application: Enjoy cinnamon as a whole spice in meals, and use cinnamon bark oil in our blood sugar balancing body oil. Our essential oils for diabetes guide explains how we approach metabolic support as part of a broader lifestyle.

3. Antifungal Strength

Cinnamon oil is one of the best-studied oils against Candida, and it has a human trial behind it. In a 2021 randomized trial, 36 people with oral thrush used either a mouthwash and spray made with cinnamon essential oil or the standard antifungal nystatin for 15 days. Both treatments reduced signs and symptoms, cinnamon cut Candida on the oral lining by 61 percent, and people said it tasted pleasant. (7)

The laboratory work keeps growing. A 2024 study found that cinnamon bark oil helped a standard antifungal drug work again against Candida auris, a drug-resistant yeast, and a second 2024 study found that a cinnamon oil nanoemulsion curbed vaginal Candida in mice. (8, 9)

Application: For household cleaning, add it to a tested formula such as our Heavy Duty Cleaner. For the mouth, see our homemade mouthwash and toothpaste recipes.

4. Digestive and Gut Health Support

Traditional medicinal uses of cinnamon include supporting the digestive system, and whole cinnamon spice remains the easiest place to begin.

The oil’s two main compounds are now being studied for the gut itself. A 2025 systematic review of animal studies found that cinnamaldehyde and eugenol calm inflammatory signals in the intestine, protect the gut lining, and shift the gut microbiome in a healthy direction. (10) Human trials are still to come.

Application: Use whole cinnamon spice generously in meals, and use the oil in tested recipes that disperse a drop or two through the whole batch.

5. Cancer Research

Last, but certainly not least, is cinnamon essential oil’s role in cancer research. A 2024 review gathered the cell and animal studies on cinnamaldehyde and found that it pushes cancer cells to self-destruct, slows their growth and spread, and starves tumors of new blood vessels. (11)

None of these studies evaluated human cancer patients, so we cannot extrapolate a dose for people. If you are in cancer treatment, work with an integrative oncologist before using concentrated oils by mouth.

How to Use Cinnamon Essential Oil

Cinnamon essential oil can be used through inhalation, topical application, and internal use, and the route sets the amount.

Inhalation

Cinnamon oil adds a warm, energizing note to diffuser blends. Because it is intense, use one drop as part of a larger blend rather than diffusing it alone, and diffuse in a ventilated room.

Our favorite cinnamon diffuser recipe is the Cut-Your-Cravings Diffuser Blend from The Essential Oils Apothecary: 1 drop cinnamon bark, 2 drops black pepper, and 2 drops peppermint. Diffuse it when cravings hit and take slow, deep breaths.

Topical Application

Cinnamon bark oil is one of the oils most likely to irritate skin, so it needs far more dilution than most oils. According to the Tisserand Institute, cinnamon bark oil should be used at no more than 0.1 percent in body oils and lotions, which is about one drop in two ounces of carrier. (12) Cinnamon leaf oil is gentler but still hot.

For targeted remedies, follow the recipe exactly, like our blood sugar body oil, and dilute properly with a good carrier oil.

Culinary and Internal Use

Yes, cinnamon bark oil can be used in food when the recipe is properly formulated. Mix the oil into a fat, syrup, or other ingredient that disperses it through the whole batch, and keep the drops tied to the full recipe.

See how we use cinnamon bark essential oil with peppermint essential oil in our fat-burning matcha latte recipe as an example to follow.

Safety Tip: Never swallow cinnamon oil neat or float a drop in water, because oil and water do not mix and it can burn your mouth and throat. For medicinal use, dilute two or three drops in an edible carrier oil in a capsule. If you take warfarin or another blood thinner, or diabetes medication, talk with your doctor first.

Where Does Cinnamon Essential Oil Come From?

While we know there are many benefits to cinnamon spice, the oil is a different and far more concentrated product.

The flavorful sticks we know are derived from the inner bark of a Cinnamomum tree, of which there are many different varieties. Cassia essential oil comes from Cinnamomum cassia and has its own profile. This article focuses on true cinnamon, Cinnamomum verum, also known as Cinnamomum zeylanicum.

Both the inner bark and the leaves can be harvested for steam distillation, and the label tells you which one you have:

• Cinnamon bark essential oil: Steam-distilled from the bark and dominated by cinnamaldehyde. It is the more powerful oil and the one most likely to irritate skin.
• Cinnamon leaf essential oil: Steam-distilled from the leaves and rich in eugenol, with much less cinnamaldehyde. It smells more like clove and is gentler, but it is still a hot oil.

Put simply, check the label before you use the oil. “Cinnamon” is not specific enough. You need the botanical name and plant part.

The History of Cinnamon Essential Oil Uses

One of the oldest and most beloved spices, cinnamon was prized in ancient times as a costly and decadent substance. It was traded across long distances, used in foods and perfumes, and valued in medicinal preparations.

Cinnamon is also one of the healing oils of the Bible, and God named it in the recipe for the holy anointing oil:

“Take the finest spices: of liquid myrrh 500 shekels, and of sweet-smelling cinnamon half as much, that is, 250, and 250 of aromatic cane.” (Exodus 30:23)

Further east, cinnamon was used in Ayurvedic and other traditional systems of medicine as a warming herb for digestion, circulation, and breathing. Over time, culinary use became standard in the Western world, and distillation gave us a far more concentrated product than a cinnamon stick or a spoonful of ground spice.

Cinnamon Essential Oil Safety

Cinnamon oil is one of the essential oils most likely to cause skin reactions when used incorrectly, which is why the dilution limits above are so low. (12)

The mouth is sensitive to it too. A 2026 study from Greece described 74 people who developed red or white sores inside the cheeks and along the tongue from cinnamon-flavored chewing gum or candy, and every case cleared within a week of stopping. (13)

Keep these practical safeguards in mind:

• Check the plant part. Bark and leaf oils have different chemistry and different maximum topical levels.
• Never use cinnamon oil neat. Do not apply it directly to skin, gums, teeth, lips, or the inside of the mouth.
• Avoid sensitive areas. Keep cinnamon oil away from eyes, nose, genitals, broken skin, and mucous membranes.
• Use ventilation. Cinnamon can irritate the airways when over-diffused.
• Keep it away from little ones. Store bottles securely and do not use strong cinnamon preparations near babies or young children’s faces.
• Pregnancy. Enjoy cinnamon in food and diffuser blends, and skip concentrated internal use.
• Stop at the first reaction. Burning, redness, swelling, itching, blistering, or coughing are signs to stop.

If undiluted cinnamon oil touches the skin, do not rinse with water first, because oil and water do not mix. Blot the area, apply a generous amount of carrier oil, and wipe it off. Get medical help for blistering, eye contact, swallowing, or trouble breathing.

Cinnamon Essential Oil FAQs

What is cinnamon essential oil good for?

Cinnamon essential oil is best known for killing bacteria and fungi, including Candida. It also supports healthy blood sugar and digestion, and its main compound, cinnamaldehyde, is being studied in cancer research.

What is the difference between cinnamon bark and cinnamon leaf oil?

Cinnamon bark oil is rich in cinnamaldehyde and has the warm, intense cinnamon aroma. Cinnamon leaf oil is rich in eugenol and smells more like clove. Both are hot oils, but bark oil needs the strictest dilution.

Can I put cinnamon essential oil directly on my skin?

No. Always dilute it, and keep cinnamon bark oil to about 0.1 percent (one drop in two ounces of carrier) in everyday body products.

Can I ingest cinnamon essential oil?

Yes, cinnamon bark oil can be used in properly formulated food recipes and, for medicinal use, diluted in a capsule. Never take it neat or in plain water. Learn more about how to ingest essential oils here.

Does cinnamon essential oil help blood sugar?

Cinnamon lowers fasting blood sugar, A1C, and insulin resistance in people with type 2 diabetes, according to 2024 and 2025 meta-analyses of the spice and capsules. If you take diabetes medication, monitor your blood sugar closely with your doctor.

Keep reading: Clove Essential Oil Benefits, Uses and Safety · 12 Best Essential Oils for Respiratory Support · 6 Healthiest Herbs and Spices & Why You Need Them