Drinking clove water daily is generally safe for most adults, as long as you keep the amount modest. Clove is classified as “generally recognized as safe” (GRAS) by the U.S. Food and Drug Administration when used in food-level quantities, and the main bioactive compound in cloves, eugenol, has been studied enough to establish reasonable intake thresholds. The more interesting question is what daily clove water actually does in your body and where the line sits between a helpful habit and a potential problem.
What Is Actually in Clove Water
When you steep whole cloves or ground cloves in hot water, the key compound that dissolves into your cup is eugenol, a phenolic substance responsible for clove’s sharp, warm flavor. Eugenol accounts for the bulk of clove’s biological activity, and it brings along a handful of other polyphenols with antioxidant properties. The concentration you get in a cup of clove water is much lower than what you’d find in clove essential oil, which is an important distinction since most of the scary toxicity reports involve concentrated oil, not clove-infused water.
Your body handles eugenol efficiently. After you drink it, eugenol is rapidly absorbed, metabolized in the liver, and almost completely excreted in urine within 24 hours. Less than 0.1% leaves the body unchanged; roughly half of the metabolized eugenol ends up as glucuronide and sulphate conjugates, with the rest processed through several other pathways.1PubMed. The metabolism of eugenol in man This means eugenol does not accumulate in your tissues day after day the way some fat-soluble compounds can. Your body clears each day’s dose before the next one arrives, which is reassuring for a daily habit.
Blood Sugar Effects
One of the more credible benefits of regular clove water consumption involves blood sugar regulation. A pilot study gave a water-soluble polyphenol-rich clove extract to healthy and prediabetic volunteers for 30 days. By day 12, both groups showed meaningful drops in post-meal blood glucose, and by day 30, the prediabetic group also showed reduced fasting glucose levels.2PubMed Central. Water-soluble polyphenol-rich clove extract lowers pre- and post-prandial blood glucose levels in healthy and prediabetic volunteers: an open label pilot study The lab work behind that study found that clove polyphenols enhanced glucose uptake in muscle cells and slowed down two enzymes (alpha-amylase and alpha-glucosidase) that break down carbohydrates. Slowing those enzymes means sugars enter your bloodstream more gradually after a meal rather than spiking all at once.
Animal research supports this direction. In mice with diet-induced insulin resistance, clove extract improved glucose tolerance, boosted insulin secretion, and improved the function of the beta cells that produce insulin.3PubMed. Clove and Its Active Compound Attenuate Free Fatty Acid-Mediated Insulin Resistance in Skeletal Muscle Cells and in Mice These are animal results and should be taken with appropriate caution, but combined with the human pilot study, there is a reasonable signal here. If you are prediabetic and already managing your diet, daily clove water is unlikely to replace medication but could be a complementary habit worth discussing with your doctor. If your blood sugar is already well-controlled, the effect would probably be modest enough that you wouldn’t notice it.
Anti-Inflammatory and Antioxidant Properties
Clove water extract has shown clear anti-inflammatory activity in cell studies, reducing the production of key inflammatory markers like IL-6 and TNF-alpha in a dose-dependent way without damaging the cells.4Journal of Food Bioactives. Exploring the anti-inflammatory effect of clove water extract in lipopolysaccharide-stimulated RAW264.7 cells and mouse peritoneal macrophages The mechanism involves blocking two well-known inflammatory pathways, which is the same general approach that many anti-inflammatory drugs use, though at a much gentler intensity.
In one of the few controlled human trials on the subject, clove bud polyphenols were tested in a crossover study looking at alcohol-related inflammation and oxidative stress. Participants who received the clove supplement showed faster clearance of blood acetaldehyde (the toxic byproduct your body makes from alcohol), along with significant decreases in markers of oxidative stress, lipid damage, and systemic inflammation compared to placebo. The overall hangover severity dropped by about 55% in the clove group.5PubMed. Clove Bud Polyphenols Alleviate Alterations in Inflammation and Oxidative Stress Markers Associated with Binge Drinking: A Randomized Double-Blinded Placebo-Controlled Crossover Study That study was specifically designed around binge drinking, so the practical relevance to daily clove water is indirect, but it does confirm that clove polyphenols have measurable antioxidant and anti-inflammatory effects in living humans, not just in petri dishes.
Water extracts of clove have also demonstrated strong anti-glycation activity. Glycation is a process where sugars bind to proteins and lipids, producing compounds linked to aging and chronic diseases like atherosclerosis. In one study testing several common spice extracts, clove and cinnamon had the strongest anti-glycation and antioxidant effects, and the clove extract group showed the smallest weight gain and strongest antioxidant activity after being fed a high-cholesterol diet.6PubMed. Water extracts of cinnamon and clove exhibits potent inhibition of protein glycation and anti-atherosclerotic activity in vitro and in vivo hypolipidemic activity in zebrafish That research used zebrafish rather than humans, which limits how directly we can apply the results, but the anti-glycation finding is consistent with clove’s broader antioxidant profile.
Oral Health
If you’ve ever had a toothache and been told to chew on a clove, you’re already familiar with clove’s oldest traditional use. Eugenol is the reason the FDA has approved clove oil as a dental analgesic.7Nutrition Today. Clove: Overview of Potential Health Benefits Beyond pain relief, clove extracts show genuine antibacterial and antifungal activity against the bacteria responsible for dental plaque, effective against both gram-positive and gram-negative species as well as fungi.8Kirkuk Journal of Medical Sciences. In vitro Antimicrobial Activity of Salvadora persica (Miswak) and of Syzigium aromaticum (Clove) Extracts against Dental Plaque Pathogens
Swishing a mouthful of clove water before you swallow it could theoretically give you some of this antimicrobial benefit, though the contact time is brief and the concentration in water is far lower than in the concentrated extracts used in lab studies. Think of it as a mild supplemental rinse rather than a replacement for brushing or mouthwash. Still, if you are drinking clove water first thing in the morning, your mouth gets a brief bath in a mildly antibacterial solution, which is a minor perk on top of whatever systemic benefits you might be after.
Effects on Gut Bacteria
One reasonable worry about drinking something antimicrobial every day is whether it disrupts your gut flora. The evidence here is mixed but generally reassuring at food-level concentrations. In vitro testing of clove essential oil against both pathogenic and probiotic bacteria found that at low concentrations, clove inhibited harmful bacteria like E. coli and Salmonella without significantly affecting beneficial Lactobacillus strains. At higher concentrations (0.1%), clove did slow the growth of some probiotic species, but that inhibition faded within 5 to 10 hours of incubation.9Journal of Functional Foods. In vitro examination of antibacterial and immunomodulatory activities of cinnamon, white thyme, and clove essential oils
The concentration of eugenol in a cup of clove water is well below the 0.1% threshold where probiotic inhibition was observed, and even at that threshold, the bacteria recovered. So a daily cup is unlikely to wreck your microbiome. If anything, at low levels, clove appears to preferentially suppress pathogenic bacteria while leaving beneficial ones relatively intact, a selective antimicrobial effect that is more helpful than harmful.
Where the Safety Line Sits
The World Health Organization has set an Acceptable Daily Intake for eugenol at 2.5 mg per kilogram of body weight per day, based on animal toxicity data with a large safety margin built in.7Nutrition Today. Clove: Overview of Potential Health Benefits For a person weighing around 70 kg (about 154 pounds), that works out to 175 mg of eugenol per day. A single whole clove contains roughly 1 to 2 mg of eugenol, and steeping a few cloves in hot water will extract only a portion of that. So you’d need to steep a very large number of cloves, or use concentrated powder in unreasonable amounts, to approach the WHO limit from water alone.
A short-term human study directly tested daily oral eugenol at 150 mg per day for seven days and found no biochemical or cytogenetic evidence of toxicity.10PubMed. Effect of short-term dietary administration of eugenol in humans That is a dose many times higher than what a normal cup or two of clove water would deliver, and it still caused no problems. The European Food Safety Authority has also concluded that eugenol is unlikely to be genotoxic at normal exposure levels and does not appear to be carcinogenic or neurotoxic.
The real danger zone involves concentrated clove oil, not clove water. In rats, high doses of eugenol (20 mg/kg and above, administered directly) caused structural and functional damage to liver tissue, including disrupted enzyme activity and elevated markers of oxidative liver stress. Only the lowest dose tested, 10 mg/kg, was considered safe for long-term consumption.11PubMed. High doses of eugenol cause structural and functional damage to the rat liver Translating rat doses to humans is imprecise, but the message is clear: the liver is the organ most vulnerable to eugenol overload, and concentrated forms of clove (especially essential oil) pose the most risk. Drinking clove-infused water stays comfortably below these danger thresholds.
Who Should Be More Careful
While clove water is broadly safe for healthy adults, certain groups should exercise caution or avoid it entirely.
- Young children: Case reports describe serious adverse events in infants and toddlers after accidental ingestion of clove oil, including central nervous system depression, severe metabolic acidosis, and fulminant liver failure from as little as 10 mL of oil.12PubMed. Clove oil ingestion in an infant 13PubMed. Essential oil poisoning: N-acetylcysteine for eugenol-induced hepatic failure and analysis of a national database These cases involved concentrated clove oil, not dilute water, but they highlight that children are far more sensitive to eugenol than adults. Giving young children clove water is not recommended, especially since no safety data exists for that age group.
- Pregnant women: Eugenol has been shown to cause potent relaxation of uterine arteries, with the effect roughly three times stronger during pregnancy than in a non-pregnant state.14bioRxiv. Eugenol induces potent vasorelaxation in uterine arteries from pregnant goats – A promising natural therapeutic agent for hypertensive disorders of pregnancy While researchers are exploring this as a potential treatment for pregnancy-related hypertension, it also means that unmonitored daily clove consumption during pregnancy could have unintended vascular effects. Animal studies have also found that high doses of clove extract caused mild degenerative changes in uterine and fallopian tube tissue in rats.15Tropical Journal of Drug Research. Evaluation of Associated Changes on the Uterus and Fallopian Tube Histology in Response to Graded Doses of Syzygium aromaticum (Clove) in Wistar Rats Low and moderate doses maintained normal tissue architecture, but the finding underscores that pregnant women should err on the side of caution.
- People with eugenol allergy: Although rare, eugenol can trigger allergic contact reactions, including contact urticaria and allergic contact dermatitis. It reacts with proteins to form conjugates that can sensitize the immune system.16PubMed Central. An unexpected positive hypersensitive reaction to eugenol If you have had a reaction to eugenol-containing dental materials or fragrances, daily oral intake is a bad idea.
- People on blood thinners or diabetes medication: Eugenol has mild antiplatelet activity and, as discussed earlier, can lower blood sugar. If you are on warfarin, heparin, or oral diabetes drugs, daily clove water could amplify the effects of your medication. This doesn’t mean you can’t use it, but you should tell your prescriber about it.
Practical Tips for Making Clove Water
The simplest method is to take two to four whole cloves, lightly crush them to release more surface area, and steep them in a cup of hot (not boiling) water for 10 to 15 minutes. You can also use a quarter to half teaspoon of ground cloves, but ground clove tends to leave sediment at the bottom of the cup. Straining through a fine mesh helps. Some people add a squeeze of lemon or a small piece of ginger to round out the flavor, since straight clove water is intensely aromatic and can feel pungent on an empty stomach.
Drinking it first thing in the morning on an empty stomach is the most common traditional approach, and there is some logic to it: the blood sugar-moderating effects could theoretically prime your metabolism before breakfast. But there is no clinical evidence that timing matters enough to worry about. If the strong flavor bothers your stomach in the morning, drinking it with or after a meal is fine.
One cup per day is a reasonable starting point. Some people work up to two cups, one morning and one evening, without problems. Going beyond that has diminishing returns and begins to nudge you toward higher eugenol intake for no clear additional benefit. And critically, do not substitute clove essential oil drops for whole cloves. Essential oil is far more concentrated, and the toxic dose is surprisingly small. The case reports of serious poisoning all involve concentrated clove oil, not brewed clove water.
Thyroid Function
An animal study that doesn’t get much attention looked at clove oil’s effect on thyroid hormones. Rats with chemically induced hypothyroidism were given clove oil emulsion, and their T3 and T4 levels improved, approaching the levels seen in rats treated with standard thyroid medication.17Asian Journal of Pharmacy and Pharmacology. Pharmacological evaluation of clove oil emulsion on propylthiouracil induced hypothyroidism in wistar rats This is a single animal study using oil rather than water extract, so it would be irresponsible to suggest clove water can treat thyroid disorders. But the finding is worth noting because millions of people deal with subclinical hypothyroidism, and the possibility that a common kitchen spice has thyroid-stimulating properties deserves further investigation. If you have a thyroid condition and are considering daily clove water, mention it to your endocrinologist, not because it is dangerous but because it could interact with thyroid hormone replacement in ways nobody has studied yet in humans.
How Clove Water Compares to Clove Supplements and Oil
The supplement industry sells clove in many forms: capsules of ground clove, standardized eugenol extracts, clove essential oil for internal use (controversial), and powdered clove blends. If you are already drinking clove water daily, you might wonder whether a supplement would be more effective.
The honest answer is that clove water is the mildest and likely safest delivery method, precisely because it is so dilute. A standardized supplement capsule can deliver 100 to 250 mg of eugenol per dose, putting you close to the upper range tested in safety studies. Clove water, by contrast, delivers a gentle fraction of that. The trade-off is potency: if future research confirms that clove polyphenols meaningfully improve blood sugar control or reduce chronic inflammation, you might need the concentrated doses found in supplements to achieve those effects. But for now, the research showing benefits in humans used polyphenol-rich extracts at doses achievable through food-level consumption, not megadoses.
Clove essential oil for internal use is the riskiest option. Although clove oil is approved as a food flavoring at very low concentrations (under 1,500 parts per million), taking even a small amount of pure oil by mouth delivers a eugenol dose that dwarfs what you’d get from water or food.7Nutrition Today. Clove: Overview of Potential Health Benefits The hepatotoxicity cases in children and the liver damage seen in high-dose animal studies all involved oil-level concentrations. Sticking with brewed clove water keeps you well inside the safety margin while still giving you a meaningful dose of the polyphenols that researchers are most interested in.