This study breaks down a recent analysis of drinking patterns showing that people who regularly combined coffee, tea, and water had the best long-term health outcomes, including a lower risk of all-cause mortality. Rather than an extreme “only water” or “all coffee” approach, the most favourable pattern was 7–8 cups spread across the day from a mix of plain water plus moderate amounts of coffee and tea.
Researchers emphasise that the study is observational, meaning it reveals correlations rather than direct cause-and-effect. Still, the findings align with multiple previous cohorts linking moderate coffee and tea intake with lower risks of cardiovascular disease, type 2 diabetes, and premature death.
Why coffee and tea might support a longer life
Coffee and tea are both rich in plant compounds polyphenols, flavonoids, and other antioxidants that interact with the cardiovascular system, metabolism, and inflammation pathways.
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Anti-inflammatory and antioxidant effects
Chlorogenic acids in coffee and catechins in tea help neutralise free radicals and reduce low-grade inflammation, both of which are central to ageing, atherosclerosis, and many chronic diseases. -
Improved vascular and metabolic health
Regular coffee and tea consumption has been associated with better endothelial function, improved insulin sensitivity, and lower risks of stroke, heart disease, and type 2 diabetes in several large population studies. One Japanese cohort even found additive benefits when green tea and coffee were consumed together in people with diabetes. -
Caffeine (and beyond) for brain and mood
Moderate caffeine can enhance alertness, mood, and reaction time, and some data suggest associations with lower risks of neurodegenerative diseases when coffee or tea are consumed habitually. Decaffeinated versions often still show benefit, pointing again to polyphenols rather than caffeine alone.
Where water fits into the longevity equation
The longevity “cocktail” in the study wasn’t just coffee and tea it also relied on adequate plain water for total intake of about 7–8 cups daily.
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Proper hydration supports blood volume, blood pressure control, kidney health, and temperature regulation, all essential as the body ages.
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Rotating water with coffee and tea helps avoid relying solely on caffeinated drinks for fluid needs, which may otherwise disturb sleep or raise anxiety in sensitive people.
In other words, water provides the baseline for physiological balance, while coffee and tea add active compounds that may fine-tune vascular and metabolic health.
How much is “just right”?
The sweet spot in the data sits at:
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Around 7–8 total cups per day of beverages, combining water, coffee, and tea.
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Moderate coffee and tea intake, rather than extremes often in the range of 1–3 cups of coffee and/or 1–4 cups of tea, depending on individual tolerance and the specific study population.
Higher doses of coffee or tea did not always produce extra benefit and may increase risks like palpitations, reflux, poor sleep, or anxiety for some people. The Vogue article and underlying research stress balance the pattern of spreading these drinks through the day, not chugging them all at once or using them to replace water entirely.
Building a longevity-friendly drink routine
Translating the research into something practical means designing a daily rhythm that supports energy and health without overstimulating your nervous system.
Example structure:
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Morning
1 cup of coffee (or matcha) after water and breakfast, not on an empty stomach, to support alertness and metabolic function. -
Midday
1–2 cups of tea green, black, or herbal blends paired with lunch or early afternoon tasks, leaning on polyphenols rather than more espresso shots. -
All day
Sip water regularly so that you hit a total of roughly 7–8 cups from all drinks combined by early evening. -
Evening
Switch to decaf or herbal teas to protect sleep, since poor sleep counteracts many of the benefits these drinks are associated with.
Layer this with the usual foundations of longevity nutrient-dense food, movement, not smoking, and stress management and your mug becomes part of a bigger, more intentional routine rather than a lone miracle fix.
The take-home: you don’t need to abandon your daily coffee or tea ritual; you might simply need to balance and hydrate around it. A thoughtfully rotated mix of water, coffee, and tea appears to sit in that sweet, practical spot where pleasure, habit, and science quietly overlap.