Cloves (Syzygium aromaticum)

Common name: Cloves
Scientific name: Syzygium aromaticum
Family: Myrtaceae (Myrtle family)
Part used: Flower buds
Herbal properties: Antibacterial, antioxidative, antiseptic, aromatic, analgesic (pain-relieving), antispasmodic

Phytonutrients in Cloves

Cloves are packed with powerful bioactive compounds:

• Eugenol: A monoterpenoid that makes up about 89% of clove essential oil. It has anti-inflammatory, antibacterial, antioxidant, and anticancer properties. Interestingly, the name “eugenol” comes from the clove tree’s old scientific name, Eugenia caryophyllata.
• Carvacrol and Thymol: Phenolic compounds with strong antibacterial effects.
• Phenolic acids: Such as gallic, caffeic, ferulic, ellagic, and salicylic acids, acting primarily as antioxidants.
• Flavonoids: Kaempferol and quercetin, natural antioxidants with anti-inflammatory, antibacterial, and anticancer properties.

Health Benefits of Cloves

Cloves, and clove essential oil, are highly effective against a wide range of bacteria, viruses, and fungi:

• Combat anaerobic oral bacteria that contribute to gingivitis.
• Fight bacteria causing foodborne illnesses, including Staphylococcus aureus and Escherichia coli.
• Active against viruses like Herpes simplex.
• Effective against many types of fungi.

Additional Benefits

1. Rich in Polyphenols
Cloves are one of the richest dietary sources of polyphenols, containing approximately 15,000 mg per 100 g. Polyphenols help prevent chronic diseases, reduce inflammation, and combat oxidative stress.

2. Pain Relief and Antispasmodic Effects
Eugenol blocks pain perception and relieves muscle spasms, making cloves an effective natural remedy for toothaches, joint pain, and cramps since at least the 13th century.

3. Bone Health and Osteoporosis Prevention
Eugenol has been shown to improve bone density, enhance calcium and phosphorus metabolism, and support bone health. This is especially beneficial for women over 50, who are more prone to age-related bone loss.

4. Liver Protection
While high doses of eugenol can be toxic to the liver, controlled amounts may help reverse liver damage caused by cirrhosis (shown in animal studies).

5. Anti-Platelet Effects
Eugenol may prevent blood clot formation, which can benefit people with high cardiovascular risk. However, caution is advised for individuals undergoing surgery or taking blood-thinning medications.

6. Antioxidant Action
Cloves are rich in antioxidants, helping to reduce inflammation and protect cells from free radical damage.

7. Cancer Prevention
Their antioxidative properties may lower the risk of cancer and inhibit tumor growth. Laboratory studies suggest potential effects against breast, cervical, esophageal, and prostate cancers.

8. Blood Sugar Regulation
Animal studies suggest that cloves can help regulate blood sugar levels, which may aid in diabetes management or reduce the risk of developing diabetes.

How to Consume Cloves

There are two main ways to use cloves for health:

1. Clove Essential Oil
This is highly concentrated, so dosing must be precise to avoid liver damage from eugenol. Always follow safety guidelines and avoid overdosing.

2. Clove Tea (Safer and suitable for daily consumption)

Instructions:

1. Take a tablespoon of whole cloves and grind them lightly (small pieces, not fine powder).
2. Add the ground cloves to a cup of boiling water.
3. Steep for 10–20 minutes.
4. Strain and remove the cloves before drinking.
5. Optional: Add honey for sweetness.

Contraindications

• People with hypersensitivity to the Myrtaceae family (guava, eucalyptus, myrtle, feijoa, etc.) or cloves should avoid them.
• Avoid cloves 1–2 weeks before and after surgery due to blood-thinning properties.

Toxicity and Safe Dosage

• Cloves are generally recognized as safe (GRAS) by the FDA.
• WHO recommends limiting eugenol intake to 2.5 mg per kg of body weight per day.
• High doses of eugenol can cause liver damage and even be fatal, especially in children.

Example: Calculating Safe Clove Oil Dose

1. Multiply your body weight (kg) by 2.5 to get your maximum daily eugenol dose in mg.
   • Example: 80 kg × 2.5 = 200 mg of eugenol/day
2. One drop of clove essential oil contains approximately 44.5 mg of eugenol (assuming 1 ml = 1000 mg, 20 drops/ml, and eugenol = 89%).
3. Divide your daily limit by 44.5 mg to determine the safe number of drops:
   • Example: 200 ÷ 44.5 ≈ 4 drops/day for an 80 kg adult

Note: The eugenol content in fresh or dried cloves is variable (9,000–15,000 mg per 100 g).

Summary:
Cloves are a powerful spice with antibacterial, antioxidant, anti-inflammatory, and pain-relieving properties. When used responsibly, they can support oral health, bone health, liver function, blood sugar control, and reduce inflammation while offering potential cancer-preventive benefits.