March 17, 2026: Drinking coffee in the morning can reduce the risk of heart disease.

Research suggests that people who consumed the beverage in the morning were less at risk of dying from cardiovascular disease and had a lower mortality risk than all-day coffee drinkers.However, there was no difference between participants who drank coffee throughout the day and those who had none at all.

Lu Qi, lead author of the study at Tulane University in Louisiana, said: “Our findings indicate that it’s not just whether you drink coffee or how much you drink, but the time of day when you drink coffee that’s important.

“We don’t typically give advice about timing in our dietary guidance, but perhaps we should be thinking about this in the future.”

Qi added: “A possible explanation is that consuming coffee in the afternoon or evening may disrupt circadian rhythm and levels of hormones such as melatonin. This, in turn, leads to changes in cardiovascular risk factors such as inflammation and blood pressure.

“Further studies are needed to validate our findings in other populations.”

Morning Coffee Linked to Lower Cardiovascular Mortality

Researchers discovered that participants who consumed coffee mainly during the morning hours had a lower risk of cardiovascular mortality compared to individuals who drank coffee throughout the day.

Interestingly, the study also revealed that people who drank coffee all day did not experience a reduced risk compared to those who did not drink coffee at all. This suggests that the potential health benefits of coffee may depend not only on the amount consumed but also on the timing of consumption.

The results highlight a new dimension of dietary research that has rarely been considered before—chrononutrition, or the impact of meal timing on health.

Why Timing May Play a Role in Heart Health

According to Lu Qi, the lead author of the study and a researcher at Tulane University, the time of day when coffee is consumed may influence important biological processes in the body.

Qi explained that the research indicates timing could play a crucial role in determining whether coffee offers protective health benefits.

“Our findings indicate that it’s not just whether you drink coffee or how much you drink, but the time of day when you drink coffee that’s important,” Qi said.

Traditionally, nutritional guidelines have focused on what people eat and drink, rather than when they consume it. However, this research suggests that dietary recommendations may eventually include advice about the timing of certain foods and beverages.

Coffee and Circadian Rhythms

One possible explanation for the findings relates to the body’s circadian rhythm, which regulates the sleep-wake cycle and many important biological functions.

Consuming caffeine later in the day may disrupt the body’s natural rhythm by interfering with hormones like melatonin, which plays a key role in regulating sleep. When melatonin levels are disrupted, it can lead to changes in blood pressure, inflammation, and other cardiovascular risk factors.

Qi noted that drinking coffee later in the day could potentially interfere with these natural processes, which might reduce the positive effects that coffee is known to have when consumed earlier.

“A possible explanation is that consuming coffee in the afternoon or evening may disrupt circadian rhythm and levels of hormones such as melatonin,” Qi said.

Coffee Has Long Been Linked to Health Benefits

Coffee is one of the most widely consumed beverages in the world, and previous research has often suggested that moderate coffee consumption can have several health benefits.

Studies have linked coffee to reduced risks of conditions such as type 2 diabetes, certain liver diseases, and even some neurological conditions. The beverage contains antioxidants and bioactive compounds that may help protect the body against inflammation and oxidative stress.

However, scientists have continued to debate the optimal amount of coffee consumption and whether factors like caffeine sensitivity or lifestyle habits influence its health effects.

The new findings add another important layer to that discussion by highlighting the potential impact of timing.

Why Morning Coffee Might Be Ideal

For many people, drinking coffee in the morning is already part of their daily routine. The new research suggests that this habit could actually align well with the body’s natural biological rhythms.

Morning coffee may help enhance alertness and mental focus without interfering with nighttime sleep patterns. By contrast, caffeine consumed later in the day may remain in the body for several hours, potentially disrupting sleep quality.

Poor sleep has been linked to a range of health problems, including high blood pressure, heart disease, and metabolic disorders, which could help explain why timing caffeine intake might influence long-term health outcomes.

Researchers Call for More Studies

Although the study’s findings are promising, researchers emphasize that additional studies are needed to confirm the results across different populations and lifestyles.

Qi noted that future research should explore how factors such as genetics, lifestyle, and existing health conditions might influence the relationship between coffee timing and cardiovascular health.

“Further studies are needed to validate our findings in other populations,” Qi said.

Scientists hope that continued research will help determine whether adjusting the timing of coffee consumption could become a simple lifestyle strategy for improving heart health.

What This Means for Coffee Lovers

For coffee enthusiasts, the findings may offer reassurance that their morning cup could potentially provide more than just an energy boost. While moderation remains important, drinking coffee earlier in the day may help maximize its potential benefits while minimizing disruptions to sleep and hormonal balance.

As research into dietary timing continues to evolve, experts believe that chrononutrition could become a key focus in future health guidelines.

Until then, starting the day with a morning coffee might not only be a comforting routine—it could also support long-term heart health.

FAQs

Does drinking coffee in the morning reduce heart disease risk?

Research suggests that people who drink coffee primarily in the morning may have a lower risk of dying from cardiovascular disease compared to those who drink coffee throughout the day.

Why does coffee timing matter?

Drinking coffee later in the day may disrupt circadian rhythms and melatonin levels, which can influence blood pressure, inflammation, and other heart-related risk factors.

Is coffee unhealthy if consumed later in the day?

The study found that all-day coffee drinkers did not experience the same health benefits as morning drinkers, but more research is needed to fully understand the impact.

How much coffee is considered healthy?

Moderate coffee consumption—generally two to four cups per day—is often considered safe for most adults, though individual tolerance can vary.

Are more studies needed on coffee timing?

Yes. Researchers say further studies are necessary to confirm the findings and determine how coffee timing affects different populations.