Researchers found boozing and smoking are directly linked to visible signs of physical ageing such as wrinkles and baldness, and looking older than one’s years.
Light to moderate drinking was not associated with biological ageing, according to the findings published online by the Journal of Epidemiology and Community Health.
But nor was it linked to the slowing of the visible ageing process, said the researchers, as there was no difference in the prevalence of the signs of ageing between light to moderate drinkers and non-drinkers.
The findings were based on information from more than 11,500 adults, whose heart health and signs of ageing were tracked for an average of 11.5 years as part of the Copenhagen City Heart Study.
The study, which began in 1976, has been monitoring a random sample of Danish people over the age of 20 living in the Copenhagen area in 1981-3, 1991-4, and in 2001-3.
Before each of the clinic visits, the participants were questioned about their lifestyle and general health and asked to state how much they drank and smoked.
And they were checked for four signs of ageing that have previously been linked to a heightened risk of cardiovascular ill health or death – earlobe creases, greyish coloured rings around the eye corneas, yellow-orange marks on the eyelids and male pattern baldness.
The average age of the participants was 51, but ranged from 21 to 86 among the women, and from 21 to 93 among the men.
Average alcohol consumption was 2.6 drinks a week for women and 11.4 for men. Just over half the women (57 per cent) and around two-thirds of the men (67 per cent) were current smokers.
Arcus coneae was the most common sign of ageing among both sexes, with a prevalence of 60 per cent among men over 70 and among women over 80.
The least common sign was xanthelasmata, with a prevalence of five per cent among men and women over 50.
A receding hairline was common among men, with 80 per cent of those over the age of 40 affected.
Analysis of drinking and smoking patterns revealed a consistently heightened risk of looking older than one’s true age and developing arcus corneae, earlobe creases, and xanthelasmata among those who smoked and drank heavily.
For example, compared with a weekly alcohol intake of up to seven drinks, a tally of 28 or more was associated with a 33 per cent heightened risk of arcus coneae among the women, and a 35 per cent heightened risk among men who knocked back 35 or more drinks every week.
Similarly, compared with not smoking, smoking one pack of 20 cigarettes daily for between 15 and 30 years was associated with a 41 per cent heightened risk among women and a 12 per cent heightened risk among men.
Male pattern baldness was not consistently associated with heavy drinking or smoking – possibly because it is strongly influenced by genes and circulating levels of male hormones, suggest the researchers.
Study author Dr Janne Tolstrup, of the University of Southern Denmark, said the research was observational so no firm conclusions can be drawn about cause and effect.
But she added: “This is the first prospective study to show that alcohol and smoking are associated with the development of visible age-related signs and thus generally looking older than one’s actual age.
“This may reflect that heavy drinking and smoking increases general ageing of the body.”