Drinking Coffee at the Wrong Time May Harm Your Heart, Experts Warn

Coffee is one of the world’s most popular drinks, and many studies suggest moderate coffee consumption may offer health benefits. However, experts now say that when you drink coffee could be just as important as how much you drink — especially when it comes to heart health.

Recent research has found that people who mainly drink coffee in the morning appear to have lower risks of heart-related death compared to those who drink coffee throughout the entire day. Scientists believe late-day coffee consumption may interfere with the body’s natural rhythms and negatively affect cardiovascular health.

One large study involving more than 40,000 adults found that morning coffee drinkers were 16% less likely to die from any cause and 31% less likely to die from cardiovascular disease compared to non-coffee drinkers. Surprisingly, those benefits were not seen in people who drank coffee all day long.

Researchers believe one reason may involve sleep disruption. Drinking coffee late in the afternoon or evening can suppress melatonin — the hormone that helps regulate sleep. Poor sleep quality has long been linked to high blood pressure, inflammation, and increased heart disease risk.

Experts also explain that caffeine remains in the body for many hours after consumption. For some people, drinking coffee too late may trigger:

• Increased heart rate
• Higher blood pressure
• Anxiety or restlessness
• Sleep problems
• Greater cardiovascular strain

Doctors say most healthy adults can safely consume moderate amounts of coffee — generally around 3 to 4 cups per day or up to 400 mg of caffeine daily. However, individuals with high blood pressure, heart conditions, anxiety disorders, or caffeine sensitivity may need to limit intake further.

Specialists also warn that unhealthy coffee habits can reduce potential benefits. Adding excessive sugar, whipped cream, flavored syrups, or high-fat creamers may increase calorie intake and negatively affect heart health over time.

Some studies further suggest that unfiltered coffee — such as boiled coffee or certain espresso preparations — may raise LDL (“bad”) cholesterol levels because of naturally occurring compounds called diterpenes.

Health experts recommend:

• Drinking coffee earlier in the day
• Avoiding caffeine close to bedtime
• Limiting excessive caffeine intake
• Choosing healthier brewing methods
• Paying attention to individual caffeine sensitivity

Researchers emphasize that coffee itself is not necessarily harmful. In fact, moderate morning coffee consumption may even support heart health. But timing appears to play a major role in whether coffee helps or harms the body.