Cloves have long held a special place in kitchens and traditional remedies around the world. Their warm, aromatic flavor enhances everything from mulled drinks and baked goods to savory stews and teas. Beyond taste, cloves are often praised for their antioxidant properties and potential digestive benefits, leading many people to use them regularly in teas, tonics, or supplements.
But as with many natural ingredients, more is not always better.
While cloves are generally safe in culinary amounts, certain health conditions can make frequent or concentrated use less suitable. Understanding when to enjoy cloves freely—and when to be more cautious—can help you protect your health while still appreciating this powerful spice.
This article explores the science behind cloves, who should use them carefully, and how to enjoy them safely as part of a balanced routine.
Why Cloves Deserve a Second Look
The primary active compound in cloves is eugenol, a naturally occurring chemical responsible for their distinctive aroma and many of their biological effects. Eugenol has been studied for its antioxidant, antimicrobial, and anti-inflammatory properties, which explains why cloves have been used in traditional medicine for centuries.
In small culinary amounts—such as one or two whole cloves used occasionally in cooking—cloves are considered safe by major health authorities, including the U.S. Food and Drug Administration (FDA).
However, problems may arise when cloves are consumed in large quantities, frequently, or in concentrated forms such as:
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Clove oil
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Strong clove teas made with many cloves
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Herbal supplements containing clove extract
In these forms, eugenol can have stronger physiological effects, which may not be suitable for everyone.
Health Situations Where Extra Caution Is Warranted
1. Managing Blood Sugar Levels
Cloves may influence blood glucose regulation. Some studies suggest they can help improve insulin sensitivity or stabilize blood sugar levels when used moderately.
However, this effect can become a concern for people who:
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Have diabetes
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Use insulin or oral blood sugar–lowering medications
When cloves are consumed regularly or in concentrated forms, they may enhance the effects of diabetes medications, increasing the risk of hypoglycemia (low blood sugar).
Possible symptoms include:
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Dizziness or lightheadedness
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Shakiness
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Sweating
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Confusion or fatigue
If you manage blood sugar levels, it’s best to:
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Stick to small culinary amounts
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Avoid daily clove teas or supplements without guidance
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Monitor how your body responds
2. Bleeding Disorders or Blood-Thinning Medications
Eugenol has mild anticoagulant (blood-thinning) properties. While this may sound beneficial, it can be problematic for people who already take medications that affect blood clotting.
This includes individuals using:
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Warfarin
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Aspirin (regular or high-dose use)
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Direct oral anticoagulants (DOACs)
Consuming large amounts of cloves or clove oil alongside these medications may increase the risk of:
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Easy bruising
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Nosebleeds
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Prolonged bleeding from cuts
Medical sources such as Healthline, Mayo Clinic resources, and LiverTox have noted this interaction as a potential concern.
Important note:
If you have scheduled surgery or dental procedures, many experts recommend avoiding concentrated clove products for at least two weeks beforehand to reduce bleeding risks.
3. Liver or Kidney Sensitivities
In rare cases, excessive intake of clove oil or eugenol has been associated with liver toxicity, especially in children or adults consuming high doses over time. Case reports documented by the National Institutes of Health (LiverTox) indicate that large amounts can elevate liver enzymes or strain liver function.
People who may need extra caution include those with:
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Pre-existing liver disease
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Chronic kidney conditions
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A history of liver enzyme abnormalities
Using cloves occasionally as a spice is unlikely to cause harm, but supplements and essential oils should be avoided or discussed with a healthcare provider if you fall into this category.
4. Pregnancy and Breastfeeding
During pregnancy and breastfeeding, safety margins matter more because evidence is limited for many herbal products.
While cloves used in cooking are generally considered safe, there is insufficient data to confirm the safety of:
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Clove oil
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Concentrated clove extracts
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Strong medicinal teas
Some compounds in cloves may theoretically stimulate uterine activity, so most medical organizations recommend erring on the side of caution.
Best practice:
Stick to food-level use only, and avoid medicinal forms unless specifically advised by a qualified professional.
5. Allergies and Sensitivities
Although uncommon, clove allergies do exist. Reactions may include:
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Skin irritation or rashes
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Mouth or throat discomfort
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Respiratory symptoms in sensitive individuals
If you have known sensitivities to spices or essential oils, start with very small amounts and discontinue use if any reaction occurs.
How to Enjoy Cloves Safely
The good news is that most people can enjoy cloves without problems when they’re used thoughtfully. The key is moderation and form.
Practical Tips:
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Use cloves primarily as a culinary spice, not a daily remedy
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Limit clove tea to occasional use (1–2 cloves per cup)
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Avoid clove oil for internal use unless directed by a professional
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Read supplement labels carefully
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Do not combine clove supplements with interacting medications
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Start small and observe how addiction body responds
Whole cloves used occasionally in cooking are generally safer than oils or extracts for everyday use.
A Balanced Perspective
Cloves are neither a miracle cure nor a dangerous spice—they are a potent natural ingredient that deserves respect. Research consistently shows that:
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Culinary amounts are safe for most people
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Concentrated forms require more caution
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Individual health conditions matter
By staying informed and choosing moderation, you can enjoy the warmth and flavor of cloves while protecting your long-term well-being.
Frequently Asked Questions
Are cloves safe to use every day?
For most people, small amounts used in cooking are safe. Daily use of supplements or strong teas is not recommended without professional guidance.
Can cloves interact with medications?
Yes. Interactions are most notable with blood thinners and diabetes medications.
Is clove tea safe if I’m healthy?
Occasional clove tea made with 1–2 cloves is generally fine. Variety and moderation are key.
Final Note
This article is intended for informational purposes only and does not replace medical advice. Always consult a qualified healthcare professional before making changes to your diet or supplement routine, especially if you have existing health conditions or take medications.