Cloves have long been celebrated for their healing properties. From soothing inflammation to easing digestion, this fragrant spice holds a strong reputation in natural medicine. Packed with antioxidants and antimicrobial compounds like eugenol, cloves can offer real benefits when used properly.
But despite their natural origin, cloves aren’t risk-free. In some situations, using them—especially in large amounts or as concentrated oil—can worsen certain health conditions or interact with medications.
If cloves are a regular part of your wellness routine, or if you’re thinking about trying them, it’s essential to understand when they might do more harm than good. Below are the key health conditions where caution is advised.
Bleeding Disorders and Blood-Thinning Medications
One of the most active compounds in cloves is eugenol, a substance known to slow blood clotting. While this may contribute to anti-inflammatory effects, it also means cloves can increase the risk of bleeding. This is particularly important for people with clotting disorders or those taking anticoagulant medications like warfarin, aspirin, or clopidogrel. Even consuming cloves through supplements or tea may amplify the effect.
If you’re preparing for surgery or have any condition that affects your blood’s ability to clot, discuss clove use with your doctor before adding it to your regimen.
Liver Disease or Elevated Liver Enzymes
In culinary amounts, cloves are generally safe. But in higher concentrations—such as clove oil or extract—eugenol may strain the liver. Studies have linked large doses of eugenol to potential liver toxicity, especially when used frequently or without supervision.
If you have a history of liver disease or abnormal liver function, it’s best to avoid concentrated clove products and stick to modest amounts found in food or tea.
Hypoglycemia and Blood Sugar Concerns
Cloves are often praised for their ability to help manage blood sugar levels, particularly in those with type 2 diabetes. However, for individuals prone to hypoglycemia, this effect can be problematic. Consuming cloves while already managing low blood sugar could lead to dizziness, shakiness, or fatigue.
If you’re managing your blood sugar closely, monitor how your body responds when using cloves regularly, and consult a healthcare provider for personalized guidance.
Digestive Sensitivities and Stomach Ulcers
While cloves support digestion in small quantities, their concentrated oils and strong flavor can be irritating for people with sensitive stomachs. Individuals with acid reflux, ulcers, or inflammatory bowel conditions may find that cloves increase discomfort, heartburn, or bloating.
If you’ve experienced digestive flare-ups after consuming spicy or pungent foods, start with very small amounts of cloves or avoid them altogether until speaking with a healthcare professional.
Allergies and Skin Reactions
Topical use of clove oil can be risky for those with sensitive skin. When applied undiluted, clove oil has been known to cause irritation, redness, or burning sensations. In rare cases, allergic reactions may occur—particularly around the mouth or lips when cloves are used in oral care.
Before using clove oil on your skin, always dilute it properly with a carrier oil and test a small area first. If you experience itching, swelling, or any other reaction, stop use immediately and consult a doctor.
Pregnancy and Breastfeeding
The safety of cloves—especially in oil or supplement form—during pregnancy or breastfeeding hasn’t been clearly established. Because eugenol can influence hormone activity and blood clotting, most natural health experts recommend limiting clove use during this time to culinary purposes only.
Pregnant or nursing individuals should avoid clove oil altogether unless advised otherwise by a qualified medical provider.
A Thoughtful Approach to Clove Use
Natural doesn’t always mean harmless. Cloves are undeniably powerful, and while they offer a wide range of benefits, they can also carry risks depending on your health status and how you use them.
If you take prescription medications or live with a chronic condition—especially related to bleeding, liver health, or blood sugar—it’s important to check with your doctor before using cloves as a regular remedy. Even seemingly minor ingredients can have significant effects when used long-term or in high doses.
Use cloves with care and respect their potency. When integrated mindfully into your diet or wellness routine, they can offer support without creating harm.
Disclaimer: This article is intended for informational purposes only and does not serve as medical advice. Always consult with your healthcare provider before starting or discontinuing any herbal supplement, especially if you have an existing medical condition or take medication.