A Spice-Rack Trend Reaches the Coffee Mug
Dropping a whole clove into your morning coffee has become a wellness trend, helped along by viral videos. One widely viewed video recommends one to three crushed cloves per cup, and the idea has older roots in spiced coffee traditions in places like Turkey and Yemen. The question is whether the health claims hold up.
What the Research Actually Covers
The research behind the buzz is thin, and the studies tested something different from a clove steeped in a mug. A 2022 study of 70 adults with prediabetes found lower blood sugar and inflammation markers over 12 weeks, but it used 250 mg of clove extract with no diet change. A 2015 ICU trial found a lower incidence of ventilator-associated pneumonia in a clove oil mouthwash group (9.5%) than in a chlorhexidine control group (19%), but that was a topical use, not a drink.
Eugenol
The main active compound in clove is eugenol. Lab and animal work looks promising, including against H. pylori, a bacterium linked to stomach ulcers. How much eugenol survives liver metabolism and reaches the body in active form is disputed, and one source's claim that less than 1% survives lacks direct citation.
The Verdict So Far
One summary of the evidence states there is no convincing human clinical evidence yet that adding one to three cloves to daily coffee improves digestion, controls blood sugar or prevents disease. The FDA considers clove safe at food-use levels, so a clove in coffee is generally low-risk for healthy adults. People on blood thinners or diabetes medication should check with a doctor first, since cloves contain compounds that can affect clotting and blood sugar.
How to Try It for Flavor
As a flavor experiment, a clove is easy to try. Clove has a strong, warm, slightly numbing character, so start with one whole clove, either dropped into the cup or added to the grounds before brewing, and taste before adding more. A darker roast stands up to the spice better than a delicate light roast, and a pinch of cinnamon or a strip of orange peel pairs well.
What to Take From It
Treat the clove as a seasoning, not a supplement. If you like the taste, there is no strong reason to avoid it. If you are hoping for blood sugar or digestive benefits, the evidence so far rests on extracts, mouthwash and lab work, not on whole cloves in a cup of coffee. Good coffee, a decent grind and fresh beans will do more for your morning than any trend.
