Coffee remains one of Britain’s best-loved beverages, with an estimated 95 million cups poured across the country every day.
For millions of people, it is more than just a drink: it is a morning ritual, a focus aid, an energy lift and, often, a quick answer to a poor night’s sleep.
Yet researchers are increasingly convinced that coffee’s effects go well beyond simply helping us feel awake. Evidence has linked the brew to potential benefits for the brain, liver and bones, with some studies suggesting that as many as five cups a day may be the sweet spot.
Part of coffee’s appeal lies in its powerful combination of caffeine, which can increase alertness and support physical performance, and anti-inflammatory polyphenols that scientists believe may help reduce the risk of dementia, heart disease, frailty and early death.
Intriguingly, however, experts now say the health impact of coffee may not be the same for everyone — and could change depending on a person’s age.
Older adults, for example, may gain more noticeable cardiovascular benefits, possibly because helpful compounds that support blood vessel health build up over time.
Women around the age of menopause, on the other hand, may be more sensitive to coffee’s potential to trigger anxiety or jitteriness.
Here, specialists explain how much coffee may be best to drink at each stage of life.
Studies have linked regular coffee consumption to a lower risk of dementia, heart disease, frailty and premature death
At least two cups a day in your 30s… even if it’s decaf
Your thirties may feel a little early to be worrying about chronic diseases.
But experts increasingly believe this is the decade when many of the conditions that emerge later in life first take root.
One study tracking more than 350,000 UK adults aged over 37 found that those who drank five or more cups of coffee a day had a significantly lower risk of liver cancer than non-coffee drinkers.
They were also around a third less likely to develop cirrhosis, a serious condition in which the liver becomes permanently scarred and damaged.
The benefits were even seen among people who drank decaffeinated coffee.
Scientists believe coffee’s protective power comes from compounds known as polyphenols, which help reduce inflammation and oxidative stress throughout the body.
These powerful antioxidants may also help protect the brain from dementia – decades before symptoms appear.
People who drink two to three cups of coffee a day over the course of their working life have a lower risk of dementia and perform better on cognitive tests than those who avoid coffee altogether, research suggests.
One study tracking more than 130,000 people over 40 years found those who routinely drank two to three cups of coffee had a 20 per cent lower risk of dementia.
Alex Manos, health and performance director at Exhale Coffee, said: ‘Polyphenols protect your brain by passing through the blood-brain barrier to reduce neuroinflammation, stimulate the growth of new neurons, and optimise blood flow.’
He cautioned that coffee should be viewed as a long-term investment rather than a quick fix.
‘Lifestyle practices should be viewed as long-term interventions,’ he said. ‘The biological imbalances that lead to dementia can start more than two decades before a diagnosis.’
Three small cups in your 40s…if you’re a woman
It’ll come as welcome news for peri-menopausal women who can’t function without their morning coffee – caffeine has been linked to healthy ageing, specifically in women.
And coffee’s protective effect appears to peak when the person drinking it is around 48-years-old, according to research.
Experts at Harvard University analysed data from more than 47,000 women aged 45 to 60 and found those who drank three small cups a day were 13 per cent more likely to see mental and physical benefits in their 70s and beyond.
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Each additional cup was linked to a two per cent higher chance of being free from major chronic diseases and in good mental and cognitive health.
‘Those who drank moderate amounts of caffeinated coffee [at that age] were more likely to age in good health over the next 30 years,’ Dr Sara Mahdavi, the study’s lead author, explained.
While the researchers stopped short of suggesting that all women should start drinking coffee, Dr Mahdavi said: ‘For women who already consume caffeinated coffee and tolerate it well, the findings are reassuring.
‘The results suggest that small, consistent habits can shape long-term health.’
The fluctuation in female sex hormones seen at this stage of life can influence how quickly caffeine is broken down, experts believe, which explains why the effect is seen mainly in women.
For some, however, hormonal changes during the perimenopause – which for most women occurs between the ages of 45 and 55 – can increase sensitivity to caffeine, making symptoms such as anxiety, palpitations and sleep disturbances worse.
Up to five cups a day could help protect your heart and liver after 50
Turning 50 often comes with a stark reminder that the risk of heart disease and stroke begins to climb.
For decades experts have warned that too much caffeine could put additional strain on an ageing heart.
But newer evidence paints a far more reassuring picture.
Earlier this year, the American Heart Association concluded that most healthy adults can safely consume five cups of coffee a day in midlife, without increasing their risk of cardiovascular disease.
That does not mean everyone over 50 should immediately start drinking five cups a day.
Dr Neil Clarke, an expert at the Institute for Scientific Information on Coffee, stressed that caffeine tolerance remains highly individual and can change with age.
‘Some older adults may benefit from adjusting intake according to their caffeine sensitivity, sleep quality, and any medical conditions or medications,’ he said.
Three to five cups daily could beat frailty in old age
Staying strong and independent becomes increasingly important as we get older.
Frailty is one of the leading causes of death in elderly populations in the UK as it dramatically increases the risk of potentially lethal injuries.
The good news is that coffee could help slow physical decline.
A recent study – published in the European Journal of Nutrition – found that regularly drinking four to six cups of coffee a day in your 60s could reduce the risk of frailty.
The team, who tracked more than 1,100 adults aged 55 and over for seven years, found moderate to high coffee consumption was associated with improvements in strength, walking speed, physical activity levels and healthy weight management.
There is also growing evidence that caffeine can help older adults remain physically active.
Not only does it activate wakeful signals in the brain, it can also help preserve muscle mass.
‘Caffeine may improve exercise performance, reduce perceived effort, and increase training capacity, helping older adults remain physically active,’ Dr Clarke says.
Those who drink at least two cups of coffee from the age of 40 onwards have also been shown to have more muscle mass than non-drinkers in later life.
Scientists believe there are a number of plausible mechanisms behind the finding.
One theory is that coffee boosts autophagy, the process by which cells break down and repair, which is vital for maintaining muscle. Its anti-inflammatory properties may also help protect against age-related muscle loss.
However studies have found this effect to be stronger in men, compared to women.
