The daily habit of sipping coffee to stay alert can offer many health benefits, but its effectiveness depends on when it is consumed and how it is brewed.
Drinking time impacts circadian rhythm
Rehabilitation doctor Wang Si-heng (Taiwan, China) cited a study published by the European Society of Cardiology in 2025. This research tracked over 40,000 adults for nearly a decade from the US National Health and Nutrition Examination Survey, combined with an analysis of 7-day dietary logs from 1,463 individuals, to assess the link between coffee consumption time and mortality rates.
Data showed that the group who only drank coffee in the morning reduced their all-cause mortality risk by 16% and cardiovascular disease mortality risk by 31% compared to non-coffee drinkers. Conversely, the habit of drinking coffee sporadically at various times throughout the day did not yield significant changes in these rates.
Explaining this, experts suggest that caffeine consumed after noon or in the early evening inhibits melatonin secretion, disrupting the natural sleep-wake cycle. Prolonged circadian rhythm disruption causes inflammatory responses and triggers blood pressure issues.
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Drinking coffee in the morning and brewing it with a paper filter helps protect cardiovascular health, reduces mortality risk, and prevents high blood pressure or bad cholesterol. Photo: Bao Bao |
Paper filters retain beneficial compounds, block bad cholesterol
Beyond timing, the brewing method also determines the safety of this beverage for the circulatory system. Nutritional medicine doctor Liu Bo-ren (Taiwan, China) cited research in the European Journal of Preventive Cardiology, which tracked the habits of 500,000 Norwegian citizens. It found that the group who regularly drank paper-filtered coffee had significantly healthier cardiovascular systems than those who abstained entirely.
The paper filter acts as a barrier, retaining most lipid compounds (coffee oils) – the culprits that stimulate an increase in bad cholesterol in the blood. As a result, the coffee retains a high proportion of chlorogenic acid and antioxidants beneficial for blood vessels.
Based on these findings, doctor Liu Bo-ren encourages consumers to prioritize manual brewing methods using paper filters or home drip coffee makers.
However, he suggests that coffee lovers do not necessarily need to completely avoid lattes. Although not passed through a paper filter, the espresso extraction process for lattes is very fast, so the amount of coffee oil released is only moderate. Enjoying it in moderation daily remains a healthy habit, relieving stress while being safe for health.
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