Cheers to ageing? Alcohol may be making you age faster, study finds

Heavy alcohol use may accelerate biological ageing and damage the body’s cells. [iStockphoto]

From high-altitude rooftop lounges to the grit of roadside base joints, Nairobi maintains a relentless, rhythmic pulse of alcohol indulgence. It is a place where the sun sets, but the ambition for one more round never fades, a nightly ritual for some and an occasional escape for others, where residents and revellers alike trade the day’s exhaustion for the sharp amber kick of a cold Tusker or the sting of a well-poured gin.

As the government moves to address what Interior Cabinet Secretary Kipchumba Murkomen recently termed a national crisis of addiction affecting an estimated 4.9 million Kenyans, the conversation is shifting from social behaviour to biological survival. New data reveals that alcohol is not merely a lifestyle choice; it is a potent accelerator of the ageing process. Think of it this way: in Kenya, you must be old enough to drink alcohol legally, and once you are, it can age you faster than normal.

Ground-breaking research from Oxford Population Health has finally answered a question that has long puzzled scientists: Does alcohol actually make people age faster, or are heavy drinkers simply living harder lives? The answer, published in the prestigious journal Molecular Psychiatry, is sobering. Using a sophisticated genetic tracking method on more than 245,000 people, scientists found that alcohol directly attacks the “biological clocks” inside our cells, stealing years of life from heavy drinkers.

To understand the discovery, one must look at telomeres. Imagine your DNA as a pair of shoelaces. At the end of each lace is a plastic tip that prevents the string from fraying. In the body, these tips are called telomeres. Every time cells divide, these tips become slightly shorter. When they become too short, the cell can no longer repair itself and eventually dies. This is the fundamental process of ageing.

The Oxford study revealed that alcohol acts like a pair of scissors, snipping away at these protective tips. For individuals consuming roughly ten large glasses of wine or several crates of beer over a month, the damage was equivalent to adding one to two extra years of ageing to their cells. For those struggling with alcohol addiction, the results were even more striking: their biological clock appeared to fast-forward by three to six years.

In the past, critics argued that drinkers aged faster because of poor diet, smoking or poverty. However, this study used a robust method known as Mendelian randomisation, a research approach that uses genetic variants as instrumental variables to determine whether a specific, modifiable exposure (such as diet or biomarkers) directly causes a health outcome rather than merely being associated with it.

Rather than relying on self-reported drinking habits, researchers examined genes assigned at birth that influence how much a person tends to drink and how their body processes alcohol. Because genes do not change based on income, lifestyle or environment, they provide a clearer picture of alcohol’s true biological impact.

“These findings support the suggestion that alcohol, particularly at excessive levels, directly affects telomere length,” said Dr Anya Topiwala, the study’s lead researcher. She noted that shortened telomeres are linked to serious late-life conditions, including Alzheimer’s disease, cancer and heart disease.

For the casual drinker, there is a silver lining, albeit a thin one. Researchers found that measurable damage became significant only after individuals crossed a certain threshold. For those consuming fewer than 17 units a week (roughly five to six beers), genetic damage was less apparent. However, the study emphasised that the more one drinks, the faster the fraying occurs. There is no magical health benefit in the bottle; rather, alcohol operates on a sliding scale of harm.

When the body breaks down ethanol, the alcohol found in drinks, it produces reactive species, essentially chemical waste that moves through cells, damaging DNA and depleting the body’s natural antioxidant defences.

Although the study was conducted using data from the UK Biobank, its implications for Kenya are significant. With Nairobi’s nightlife booming and “happy hour” culture becoming a corporate norm, thousands of professionals may be inadvertently shortening their lifespan. “The science is showing exactly how alcohol causes so much ill health,” said Dr Richard Piper, Chief Executive of Alcohol Change UK. “The dose matters; even reducing drinking could bring benefits.”

If you want to preserve your youth, it may be worth starting by looking at what is in your glass. Your DNA is keeping count.