It numbs a toothache. It started wars. And one version of it can land you in hospital. Here is what clove really does — in plain language.
There is a small jar at the back of your cupboard that you open twice a year, usually in December.
That jar contains one of the most chemically potent things in your kitchen.
Clove has been used in dentistry for over a century. It has been prized in four healing traditions. It is also sold online with claims that fall apart the moment you check them — and it comes in a form that poison control centres get calls about.
All of that is true at once. Here is how to tell the parts apart.
First, what clove actually is
It is a flower bud. Picked before it opens, dried until it hardens into a little brown nail — which is where the name comes from, clavus, Latin for nail.
Crush one and almost everything you smell is a single molecule: eugenol. It makes up 70 to 90 per cent of clove oil. That is a staggering concentration for a natural material, and it explains both why clove works and why it deserves respect.
The one thing clove is genuinely good at
Numbing.
Eugenol dulls sensory nerve endings on contact. Your dentist already knows this — eugenol has been used in temporary fillings and dry-socket dressings for generations. In one clinical trial, clove gel performed comparably to benzocaine, the standard topical anaesthetic, at reducing pain before an injection.
So the folk remedy has real footing. With one catch.
Numbing is not healing. Clove oil cannot repair a cavity, drain an abscess or clear an infection. Used to delay a dental appointment, it turns a small problem into an expensive one. And applied straight from the bottle, it burns gum tissue.
From the Viva shop
NOW Clove Oil (118 ml), $30.89. Pure clove bud oil with that warm, resinous depth. Use it the way an aromatherapist would: a few drops in a diffuser, or well diluted in a carrier oil. Never neat. Never swallowed.
What the evidence actually says
Most confusion about clove comes from one gap: the difference between a result in a petri dish and a result in a person. Here is the whole picture in one place.
| Claim | Verdict |
|---|---|
| Temporary relief of dental pain | Supported — clinical evidence in people |
| High antioxidant content | Supported — among the highest of any culinary spice |
| Easing nausea and heavy digestion | Traditional — long use, limited modern trials |
| Blood sugar support | Early — one small 2019 pilot study, promising, not proof |
| Kills bacteria and fungi | Lab only — not shown to treat infection in people |
| Cures infections | Not supported |
| Cleanses parasites | Not supported |
| Prevents cancer | Not supported |
| Boosts immunity | Not supported |
None of that makes clove disappointing. A spice with two proven strengths and a handful of promising leads is far more useful than one that supposedly does everything.
Four traditions, four different ideas
What is striking is not that several cultures used clove. It is how differently they reached for it.
- China — Ding Xiang. Warming and pungent. Used for nausea, hiccups and cold, sluggish digestion.
- Ayurveda — lavanga. Directed at digestive fire, the mouth, the throat and the chest.
- Indonesia — clove's birthplace. Aromatic oils, warming massage blends, and the jamu tonic culture still practised in Java today.
- Europe — arrived last, used it most clinically. Apothecary shelves, then dentistry, where eugenol quietly remains.
Centuries of consistent use are a strong hint. They are not a clinical result. Tradition tells us where to look — it does not tell us what we will find.
From the Viva shop
Bell Indigestion Tea (30 bags), $14.79. If the digestive thread is what interests you, this is the sensible way in: a herbal infusion for post-dinner heaviness, at tea strength rather than pharmacy strength. A cup after dinner is a ritual. A dropper of essential oil is not.
The safety rule almost nobody mentions
This is the part worth reading twice.
Whole cloves and clove essential oil are not the same product.
A few buds simmered into rice, mulled into wine or steeped as a mild tea: small amounts, centuries of everyday use, no real concern for most healthy adults.
Concentrated clove oil is a different substance. The NIH's LiverTox database flags eugenol for potential liver toxicity. MedlinePlus keeps a poisoning entry for clove oil specifically. Swallowed — especially by children, where small volumes have caused serious harm — it can cause liver injury, drowsiness and clotting problems. Undiluted on skin or gums, it burns.
There are interactions, too. Eugenol may thin the blood, which matters if you take warfarin or clopidogrel, or have surgery coming up. Given the blood sugar research, concentrated clove alongside diabetes medication is a conversation with your prescriber, not an experiment.
Natural does not mean gentle. Foxglove is natural. What decides risk is concentration, dose, and the body it enters.
From the Viva shop
Wedderspoon Raw Manuka Honey, KFactor 16 (250 g), $35.69. The luxurious, low-risk version of a clove ritual: three whole buds steeped in hot water, a spoonful of raw Manuka stirred through, drunk slowly. Caramel, wet earth, a low burn at the back of the throat. No arithmetic on a dropper.
How to use clove well
- In food — freely. Whole buds in braises, rice, poached fruit, chai. Buy whole and grind as needed; ground clove fades fast.
- As tea — gently. Two or three buds per cup, ten minutes, honey optional.
- As essential oil — carefully. Diffused, or diluted to about one per cent in a carrier oil. Patch test first. Never neat, never internal.
- For a toothache — briefly. As a stopgap on the way to the dentist, not instead of one.
- Not at all — if you are pregnant or breastfeeding, giving it to a young child, taking blood thinners or diabetes medication, or heading into surgery. Ask your clinician first.
The bottom line
Clove earned its reputation. It numbs, it warms, it preserves, and it carries one of the densest antioxidant profiles in the spice drawer.
What it has not earned is the marketing wrapped around it.
Holding both of those at once is the whole skill. That is not cynicism — it is the difference between using a botanical well and being sold one.
Quick answers
Does clove really help a toothache?
Yes, temporarily. Eugenol numbs nerve endings on contact and performed comparably to benzocaine in a clinical trial. It relieves the pain — it does not treat the cause.
Can I put clove oil straight on my gums?
No. Undiluted clove oil burns gum tissue. If you use it at all, dilute it well and keep it brief, as a bridge to a dental appointment.
What is eugenol?
The compound behind 70–90% of clove oil. It gives clove its scent and its numbing, antimicrobial and antioxidant activity, and it is used in dental cements.
Whole cloves versus clove oil — what is the real difference?
Concentration. Cloves in food or tea are gentle. Clove essential oil is a concentrated extract — swallowing it can cause serious poisoning, including liver injury.
Does clove interact with medication?
It may. Eugenol can affect blood clotting, which matters with blood thinners and before surgery, and clove extract has been studied for effects on blood sugar. Check with your healthcare provider first.
Shop the story
- NOW Clove Oil (118 ml) — $30.89. For diffusing and properly diluted topical use.
- Wedderspoon Raw Manuka Honey, KFactor 16 (250 g) — $35.69. For the nightly clove infusion.
- Bell Indigestion Tea (30 bags) — $14.79. For post-dinner heaviness.
- Desert Essence Tea Tree Oil (30 ml) — $17.79. Another potent botanical worth the same respect: dilute, patch test, never swallow.
For information only, not medical advice. Speak with a qualified healthcare provider before using concentrated clove products — particularly if you are pregnant, breastfeeding, giving them to a child, taking blood thinners or diabetes medication, or preparing for surgery. Clove oil is not a substitute for dental care.
