If you usually drink coffee in the afternoon or evening, you might want to reconsider—some of coffee’s health benefits seem to appear only when it’s consumed in the morning.
Researchers at Tulane University (USA) tracked the coffee-drinking habits of 40,725 adults over 10 years.
Morning Coffee Linked to Lower Death Risk
Their analysis found that people who drank coffee in the morning had a 16% lower risk of death from any cause and a 31% lower risk of death from heart disease compared to those who did not drink coffee.
However, the statistics showed no risk reduction for people who drank coffee throughout the day.
This is the first study to investigate the relationship between the timing of coffee consumption and its effects on health. The findings suggest that not only whether you drink coffee—and how much—but also when you drink it matters.
This was an observational study, designed to identify associations rather than direct cause-and-effect. The researchers adjusted for key factors that affect heart health and mortality—such as age, gender, physical activity, and sleep habits—but other influences, like genetic factors, may not have been fully accounted for.
How Much You Drink Matters Too
Among morning coffee drinkers, the health benefits were similar whether they consumed a moderate amount (2–3 cups/day) or more than 3 cups/day. Those who drank less than 2 cups/day experienced smaller effects.
Because caffeine is a stimulant, drinking coffee in the afternoon or evening can disrupt the body’s natural rhythms and hormones such as melatonin, which helps regulate sleep. This can lead to changes in cardiovascular risk factors such as inflammation and blood pressure.
A Broader Context
Previous studies have already linked coffee consumption to several health benefits, including lower risk of high blood pressure and stroke, longer life expectancy, and reduced recurrence of certain cancers.
In fact, coffee contains hundreds of different compounds, and scientists are still exploring how these substances affect the human body.
While further research is needed—including clinical trials and studies across different populations—the current evidence suggests that morning coffee may offer the greatest health benefits. Until more is known, you may want to limit coffee intake later in the day.