Adding milk to coffee is a daily ritual for many. But behind this comforting combo lies a fascinating mix of science, health, and personal preference. From possible digestive issues to surprising health benefits, this pairing has sparked plenty of debate.

Coffee with Milk: A Cozy Combo or a Digestive Challenge?

That splash of milk in your coffee might make it smoother, but it can also complicate digestion. According to naturopath Virginie Fleur, “coffee with milk can be difficult to digest because the tannins in coffee coagulate the casein in milk,” which may lead to bloating or discomfort.

Not everyone feels these effects. Some people drink coffee with milk every day without any issues, while others report nausea, bloating, or stomach upset. One possible reason? As we age, our body produces less lactase—the enzyme needed to digest lactose—making milk harder to tolerate. Plus, milk can increase coffee’s acidity, potentially worsening heartburn, especially in those with acid reflux.

Unexpected Upsides: Not All News is Bad

Despite the digestive debates, there’s good news for fans of this duo. A recent study from the University of Copenhagen found that combining coffee’s polyphenols with the amino acids in milk actually increases antioxidant activity. This synergy may help reduce inflammation in the body—a promising benefit for anyone looking to support long-term health.