A new study published in the European Heart Journal suggests that the timing of coffee consumption matters: people who drink their coffee primarily in the morning have a significantly lower risk of death from cardiovascular disease and all causes compared to those who drink it throughout the day or not at all.
Led by Lu Qi, MD, PhD, at Tulane University, the research analyzed data from over 40,000 adults in the National Health and Nutrition Examination Survey (NHANES) and 1,463 participants in the Women’s and Men’s Lifestyle Validation Study. Participants were categorized into non-coffee drinkers, “morning-type” drinkers (almost all coffee before noon), and “all-day-type” drinkers (coffee spread throughout the day).
Over nearly a decade of follow-up, morning coffee drinkers showed:
- 16% lower risk of all-cause mortality
- 31% lower risk of cardiovascular disease-related death
All-day coffee drinkers showed no significant mortality benefit compared to non-drinkers. Moderate to heavy morning consumption (2+ cups) was associated with the strongest risk reductions.
Researchers speculate that morning coffee aligns with the body’s natural circadian rhythm, supporting alertness and metabolism without disrupting sleep or melatonin production. Late-day caffeine, by contrast, may interfere with sleep quality and hormonal balance, potentially offsetting health benefits.
“Drinking coffee in the morning shows a better beneficial relation than all-day drinking with cardiovascular and all-cause mortality,” Qi told Healthline.
However, experts caution that the observational study cannot prove cause and effect. Limitations include self-reported data, predominantly white participants with higher income, and no clear mechanism explaining the timing effect. Cardiologist Thomas Lüscher, who wrote an accompanying editorial, noted that while the findings are intriguing, more rigorous trials are needed before changing recommendations.
For now, if you drink coffee regularly, limiting it to the morning hours may offer the best balance of benefits without sleep disruption. Coffee continues to be linked to reduced risks of type 2 diabetes, heart disease, and certain cancers when consumed in moderation.