Do you know that a single clove, barely an inch long, holds more antioxidant power than half a cup of blueberries? This tiny, fragrant spice, often relegated to pumpkin pies and mulled wine, is a nutritional powerhouse that has been cherished for centuries. It is not just for its distinctive flavor but for its profound medicinal properties.
From supporting oral health to potentially fighting cancer, cloves are more than just a holiday spice for your apple cider. In this article, we’ll explore the impressive 16 health benefits of cloves, their nutritional profile, and potential side effects. In addition, we will also share practical ways to incorporate them into your daily routine.
What Are Cloves?
Cloves are the aromatic flower buds of the evergreen tree Syzygium aromaticum, native to the Maluku Islands in Indonesia. These distinctive nail-shaped buds are harvested before they bloom and then dried until they turn a deep brown color.
When you bite into a clove, you’ll immediately notice its strong, pungent flavor – intensely aromatic with hints of sweetness, astringency, and a numbing quality that lingers on the palate. This complex profile makes cloves a staple in both sweet and savory dishes across many cuisines.
What Makes Cloves So Powerful?
Before we dive into the benefits, it helps to understand why cloves work so well. The secret is a compound called eugenol, which makes up 72–90% of clove essential oil. Eugenol is a natural phenylpropanoid with antioxidant, anti-inflammatory, antimicrobial, and even analgesic (pain-relieving) properties.
Here’s a quick look at the key bioactive compounds in cloves:
| Compound | Primary Benefit |
|---|---|
| Eugenol | Antioxidant, anti-inflammatory, pain relief |
| Acetyl eugenol | Antithrombotic (blood clot prevention) |
| Gallic acid | Antioxidant, anticancer properties |
| Quercetin | Anti-inflammatory, immune support |
| Kaempferol | Antioxidant, anti-cancer |
| Vitamin C | Immune function, collagen synthesis |
| Manganese | Bone health, enzyme function |
Cloves also deliver a meaningful nutritional punch. Just 1 teaspoon (2g) of ground cloves provides:
- 6 calories
- 1g fiber
- 55% of your daily manganese needs
- 3% of your daily vitamin C
- 2% of your daily vitamin K
16 Amazing Health Benefits of Cloves
1. Loaded With Antioxidants
Cloves rank among the highest antioxidant-containing foods on the planet. According to research published in the Journal of Food Science, cloves have an ORAC (Oxygen Radical Absorbance Capacity) value of over 290,000 µmol TE/100g — that’s roughly 30 times higher than blueberries.
Antioxidants neutralize free radicals — unstable molecules that damage cells and contribute to aging, cancer, and chronic disease. Eugenol is the star player here, but cloves also contain vitamin C, quercetin, and kaempferol, all of which add to their antioxidant firepower.
💬 “Eugenol has been shown to be more effective than vitamin E — one of the most well-known antioxidants — at stopping oxidative damage in certain studies.”
Bottom line: Adding cloves to your diet is one of the easiest ways to boost your antioxidant intake without supplements.
2. Powerful Anti-Inflammatory Effects
Chronic inflammation is at the root of most modern diseases — from heart disease and diabetes to arthritis and Alzheimer’s. Cloves contain several compounds that actively fight inflammation at the cellular level.
Eugenol has been shown to inhibit the production of pro-inflammatory cytokines and block the COX-2 enzyme (the same enzyme targeted by ibuprofen and other NSAIDs). This makes cloves a natural, food-based anti-inflammatory option.
A 2020 study found that eugenol significantly reduced inflammatory markers in animal models, suggesting strong potential for human applications.
Who benefits most?
- People with arthritis or joint pain
- Those with inflammatory bowel conditions
- Anyone dealing with chronic low-grade inflammation
3. Cloves Support Dental Health Naturally
This is probably the most well-known traditional use of cloves — and science backs it up. Clove oil has been used in dentistry for centuries as a natural analgesic and antiseptic.
Eugenol is actually an approved ingredient in many dental products, including temporary fillings and root canal sealers. Its ability to:
- Numb pain (local anesthetic effect)
- Kill oral bacteria (Streptococcus mutans, a primary cause of cavities)
- Reduce gum inflammation
A study confirmed that clove-based gel was as effective as benzocaine (a common topical anesthetic) for reducing needle insertion pain.
⚠️ Note: Clove oil is very potent. Always dilute it before applying to gums — undiluted clove oil can cause irritation or chemical burns.
4. May Help Regulate Blood Sugar
For people managing blood sugar levels, cloves are worth paying attention to. Research suggests that cloves can mimic insulin and improve how cells take up glucose from the bloodstream.
A study published in the Journal of Medicinal Food found that clove extract significantly reduced blood glucose levels in diabetic mice by improving insulin sensitivity. The active compound responsible appears to be nigericin, which has been shown to promote glucose uptake in muscle cells.
Key findings from research:
- Cloves may reduce fasting blood glucose
- They appear to improve insulin sensitivity
- They may lower HbA1c (a long-term blood sugar marker) over time
💡 Tip: Adding ½ teaspoon of ground cloves to oatmeal, smoothies, or tea is an easy, low-risk way to incorporate this benefit into your routine.
5. Strong Antimicrobial Properties
Cloves are one of the most potent natural antimicrobials known to food science. Research has shown that clove essential oil is effective against a wide range of harmful microorganisms, including:
- Escherichia coli (E. coli)
- Staphylococcus aureus (Staph)
- Candida albicans (a common fungal infection)
- Listeria monocytogenes
A 2017 study found that clove oil inhibited the growth of multiple drug-resistant bacteria, making it a promising candidate for natural preservatives and infection-fighting applications.
This is also why cloves have historically been used to preserve food — long before refrigerators existed.
6. May Have Anti-Cancer Properties
This is an exciting area of emerging research. Several studies have found that compounds in cloves — particularly eugenol and oleanolic acid — may have anti-tumor effects.
A 2019 study in the Asian Pacific Journal of Cancer Prevention found that clove extract induced apoptosis (programmed cell death) in breast cancer cells without harming healthy cells. Other studies have shown similar effects on:
- Cervical cancer cells
- Colon cancer cells
- Esophageal cancer cells
⚠️ Important caveat: This research is mostly in lab settings (in vitro) or animal models. Cloves are NOT a cancer treatment. But they may play a supportive role in a cancer-preventive lifestyle.
7. Supports Respiratory Health
Cloves have long been used in Ayurvedic and traditional Chinese medicine to treat respiratory conditions — and there’s good reason for it. Their expectorant properties help loosen mucus in the airways, making it easier to cough up and clear congestion.
Eugenol also acts as a bronchodilator in some studies, meaning it may help open up the airways. This could be beneficial for people with asthma or chronic bronchitis.
Traditional uses that still hold up:
- Clove tea for sore throats
- Clove steam inhalation for sinus congestion
- Clove-infused honey for coughs
8. May Protect Brain Health
Emerging research suggests that eugenol and other clove compounds may offer neuroprotective benefits — meaning they could help protect the brain from damage and degeneration.
A study in Food and Chemical Toxicology found that eugenol reduced oxidative stress in brain tissue and protected neurons from damage. Other research has linked clove extract to:
- Improved memory and learning in animal models
- Reduced markers of Alzheimer ‘s-related damage
- Protection against neurotoxins
While human clinical trials are still limited, the early evidence is encouraging for anyone interested in brain longevity.
9. Promotes Strong Bones
Manganese might not be the most glamorous mineral, but it’s essential for bone formation and density. And cloves happen to be one of the richest dietary sources of manganese available.
Just 1 teaspoon of ground cloves delivers over 55% of your daily recommended manganese intake. Manganese plays a key role in:
- Activating enzymes needed for bone formation
- Supporting collagen production in bones
- Regulating calcium absorption
Animal studies have also shown that eugenol may help prevent bone loss associated with osteoporosis, though human studies are still needed.
10. May Improve Liver Health
The liver is your body’s main detox organ, and cloves appear to be genuinely good for it. Research has shown that eugenol can help protect the liver from oxidative stress and inflammation — two major drivers of liver disease.
A study published in the Journal of Medicinal Food found that clove extract significantly reduced liver damage markers in mice fed a high-fat diet. Another study showed eugenol reduced signs of non-alcoholic fatty liver disease (NAFLD).
However, it’s worth noting that high doses of eugenol can actually be toxic to the liver — so this is a case where the dose truly makes the difference. Culinary amounts of cloves are safe and beneficial; concentrated clove oil supplements should be used with caution.
11. Supports Gut Health
Cloves have a long history as a digestive aid, and modern science supports many of these traditional uses. They appear to:
- Reduce gas and bloating by relaxing smooth muscle in the GI tract
- Fight H. pylori, the bacteria responsible for most stomach ulcers
- Stimulate digestive enzyme production, improving nutrient absorption
- Act as a mild laxative in larger amounts
A 2020 study found that clove extract significantly inhibited H. pylori growth — a promising finding given that this bacterium affects roughly 44% of the global population and is a leading cause of gastric ulcers.
12. Natural Pain Relief
Cloves have been used as a natural analgesic for thousands of years — and eugenol is why. It works by blocking specific pain receptors (TRPV1 channels) and reducing the transmission of pain signals.
Beyond dental pain (covered earlier), cloves have shown promise for:
- Headaches — topical clove oil on the temples
- Arthritis pain — due to anti-inflammatory effects
- Muscle soreness — clove-infused massage oils
- Menstrual cramps — some evidence supports clove as a natural antispasmodic
13. May Help Lower Cholesterol
Heart disease remains the #1 killer worldwide, and cholesterol management is a key part of prevention. Some research suggests cloves may have a positive effect on lipid profiles.
Animal studies have shown that clove extract can:
- Lower LDL (“bad”) cholesterol
- Raise HDL (“good”) cholesterol
- Reduce triglycerides
The mechanism appears to involve eugenol’s antioxidant effects, preventing LDL oxidation — a key step in the development of arterial plaque. Human trials are still limited, but the early results are promising.
14. Cloves as a Natural Antifungal
Fungal infections — from athlete’s foot to oral thrush to systemic candida overgrowth — affect millions of people. Clove oil has demonstrated strong antifungal activity in multiple studies.
Research published in the Brazilian Journal of Microbiology found that clove essential oil was effective against 17 different strains of Candida, including some that were resistant to conventional antifungal drugs.
Common antifungal applications:
| Condition | Application Method |
|---|---|
| Oral thrush | Diluted clove oil mouth rinse |
| Athlete’s foot | Diluted clove oil topical application |
| Nail fungus | Clove oil in carrier oil, applied twice daily |
| Skin fungal infections | Clove-infused cream or oil |
15. May Improve Sleep Quality
This one surprises most people. Cloves contain eugenol and acetyl eugenol, both of which have mild sedative properties in research settings. They appear to work by modulating GABA receptors in the brain — the same pathway targeted by many sleep medications (though much more gently).
Traditional medicine systems in India and Southeast Asia have long recommended clove tea before bed for better sleep. While large clinical trials are lacking, the mechanistic evidence and centuries of traditional use make this a low-risk, potentially rewarding experiment.
Simple clove sleep tea recipe:
- Simmer 2-3 whole cloves in 1 cup of water for 10 minutes
- Add a small amount of honey and a pinch of cinnamon
- Drink 30 minutes before bed
16. Natural Insect Repellent
Okay, this one is less about internal health — but it’s genuinely useful and often overlooked. Clove essential oil is one of the most effective natural insect repellents available, particularly against mosquitoes.
A 2011 study in the Journal of the American Mosquito Control Association found that a 100% clove oil preparation provided 100% protection against mosquito bites for up to 4 hours — comparable to DEET in some conditions.
Beyond mosquitoes, clove oil has shown effectiveness against:
- Dust mites
- Flies
- Ants
- Moths
This makes it a great non-toxic alternative for households with children or pets.
Potential Side Effects and Precautions
While generally safe when consumed in culinary amounts, cloves have important considerations, especially in concentrated forms like essential oil or in large doses.
Common Side Effects (usually from excessive use):
- Digestive Upset: Large amounts of ground cloves can cause stomach upset, nausea, or diarrhea.
- Allergic Reactions: Though rare, some individuals may be allergic to cloves and experience symptoms such as a rash, itching, swelling, or difficulty breathing.
- Oral Irritation: Undiluted clove oil can cause burning, irritation, or numbness in the mouth and gums.
Specific Precautions:
- Bleeding Disorders: Eugenol in cloves can slow blood clotting. If you have a bleeding disorder or are taking anticoagulant medications (blood thinners like warfarin), avoid large amounts of cloves and consult your doctor before using clove supplements or essential oil.
- Surgery: Due to its effect on blood clotting, discontinue clove consumption (especially in medicinal doses) at least two weeks before any scheduled surgery.
- Children: Clove essential oil is generally not recommended for children, especially infants, due to its potency and potential for toxicity if ingested. Even small amounts can cause serious side effects like liver damage or seizures in young children.
- Pregnancy and Breastfeeding: While culinary amounts of cloves are likely safe, there is insufficient evidence on the safety of medicinal doses or clove essential oil during pregnancy and breastfeeding. It’s best to err on the side of caution and consult a healthcare professional.
- Liver Disease: Individuals with liver disease should be cautious with high doses of cloves or clove oil, as eugenol can potentially harm the liver in very large quantities.
- Drug Interactions:
- Anticoagulants (Blood Thinners): Cloves can increase the risk of bleeding.
- Medications for Diabetes: Cloves may lower blood sugar, potentially leading to hypoglycemia if combined with diabetes medications. Monitor blood sugar closely.
Always consult with a healthcare professional before using cloves in medicinal quantities or as a supplement, especially if you have underlying health conditions or are taking medications.
How to Use Cloves: Culinary, Medicinal, and Aromatic Applications
Let’s explore the practical applications of whole cloves, ground cloves, and clove essential oil.
Clove Water: A Simple Daily Tonic
Clove water has gained popularity as a simple way to harness this spice’s benefits. To prepare:
- Add 3-5 whole cloves to 8 ounces of filtered water
- Allow to steep overnight (8-12 hours) at room temperature
- Strain and drink first thing in the morning
The resulting infusion delivers water-soluble compounds from cloves in a gentle concentration. Many people report improved digestion, reduced bloating, and more stable energy levels when consuming clove water regularly.
Culinary Uses of Cloves
Incorporating cloves into your diet represents perhaps the safest and most enjoyable way to benefit from this spice:
- Add whole cloves to rice dishes, stews, and curries
- Include ground cloves in baked goods, especially those featuring apples, pears, or pumpkin
- Use cloves in homemade chai tea blends
- Include cloves when making mulled wine or cider
- Add a tiny pinch to coffee grounds before brewing for enhanced flavor
- Incorporate into spice rubs for meats, particularly ham and lamb
- Use in marinades for both meat and vegetables
The culinary versatility of cloves spans sweet and savory applications across numerous global cuisines, making regular consumption practical and enjoyable.
Clove Tea: Therapeutic Beverage
For a more concentrated form than clove water:
- Crush 5-7 whole cloves slightly to release oils
- Add 8 ounces of boiling water
- Cover and steep for 5-10 minutes
- Strain and sweeten if desired (honey complements cloves well)
This preparation is particularly useful for digestive discomfort, sore throats, or when fighting off a cold.
Essential Oil Applications
Clove essential oil offers the most potent form of cloves’ beneficial compounds, but requires careful use:
- Topical pain relief: Dilute 2-3 drops in 1 tablespoon of carrier oil and apply to affected areas
- Diffusion: 3-5 drops in a diffuser can purify air and potentially reduce airborne pathogens
- Dental applications: A single drop on a cotton ball placed near (not directly on) a painful tooth
- Antimicrobial cleaning: Add to homemade cleaning solutions for enhanced disinfection
IMPORTANT: Never ingest clove essential oil without professional guidance. Always dilute before topical use and perform a patch test first.
Supplements and Extracts
Commercial clove supplements are available as capsules, tinctures, and standardized extracts. These forms allow for precise dosing but should be approached with caution:
- Start with low doses and increase gradually
- Purchase from reputable manufacturers with third-party testing
- Consider professional guidance, especially if taking medications
- Discontinue use if any adverse reactions occur
Typical supplement dosages range from 500mg to 2000mg of clove powder daily, divided into 2-3 doses.
General Safety Guidelines
- Moderation is Key: When using whole or ground cloves in cooking, typical amounts are perfectly safe.
- Dilute Essential Oil: Always dilute clove essential oil heavily with a carrier oil (like coconut, olive, or almond oil) before topical application. A common dilution is 1-2 drops of essential oil per teaspoon or tablespoon of carrier oil, depending on the application.
- Never Ingest Undiluted Clove Oil: Clove essential oil is not meant for internal consumption without expert medical supervision.
- Patch Test: Before applying diluted clove oil to a larger area of skin, perform a patch test on a small, inconspicuous area to check for sensitivity.
- Consult a Healthcare Professional: If you have any underlying health conditions, are pregnant, breastfeeding, or taking medications, talk to your doctor or a qualified aromatherapist before using cloves for medicinal purposes or using clove essential oil.
By being mindful of these precautions, you can safely enjoy the incredible benefits and flavors that cloves have to offer.
FAQs
1. Are cloves and garlic related?
No, despite some similar properties, they belong to different plant families. Cloves are flower buds from the Myrtaceae family, while garlic belongs to the Amaryllidaceae family.
2. Can I give cloves to my pet?
No, clove oil is toxic to cats and potentially harmful to dogs. Even small amounts can cause problems for small pets.
3. How long do cloves last?
Whole cloves can maintain their potency for 2-3 years when stored in a cool, dry place in an airtight container. Ground cloves begin losing potency after about 6 months.
4. Can cloves help with weight loss?
Some preliminary research suggests cloves might support metabolism and fat reduction, but they are not a standalone weight loss solution.
5. What does clove taste like?
Cloves have a strong, warm, aromatic, and slightly bitter flavor with intense sweetness. They have a numbing effect on the tongue due to the eugenol content.
6. Is it safe to use clove oil directly on skin?
No, clove essential oil should always be diluted before applying to the skin. Undiluted clove oil can cause irritation, burning, or even tissue damage.
7. Can I grow my own clove tree?
Clove trees require a tropical climate and take years to mature. They grow best in zones 10-12 and need consistent warmth and humidity.
8. Are clove cigarettes safer than tobacco cigarettes?
No, clove cigarettes (kreteks) contain tobacco plus cloves and have been shown to deliver more nicotine, tar, and carbon monoxide than conventional cigarettes. They’re not a safer alternative.
