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New research challenges long-held beliefs about alcohol and young adults
A growing body of scientific evidence is overturning common assumptions about alcohol consumption among young people, revealing unique risks to the developing brain and questioning the notion of a "healthier" European drinking culture.
The developing brain and alcohol
Contrary to previous beliefs, the human brain continues to develop well into a person's mid-20s. This prolonged maturation process makes young adults particularly vulnerable to the effects of alcohol, according to recent studies.
Lindsay Squeglia, a neuropsychologist at the Medical University of South Carolina, explains that the brain undergoes significant changes during adolescence, including a decline in grey matter and an increase in white matter. "These are like the brain's super-highways," she says, "allowing for faster information processing."
"A lot of people describe the adolescent brain as having a fully developed gas pedal without brakes."
Lindsay Squeglia, Medical University of South Carolina
Alcohol can disrupt this delicate balance, potentially impairing long-term cognitive development. Longitudinal studies show that early drinking is associated with a more rapid decline in grey matter and stunted growth of white matter.
Unique risks for young drinkers
Several factors make alcohol more dangerous for younger people, even after they reach the legal drinking age. Ruud Roodbeen, a post-doctoral researcher at Maastricht University, highlights that young adults often have smaller body sizes and different proportions compared to older adults.
"Drinking one glass of alcohol therefore results in a higher blood alcohol content for young people than for adults," Roodbeen says. Additionally, a higher head-to-body ratio means that a larger proportion of consumed alcohol reaches the brain, increasing the risk of alcohol poisoning.
Early alcohol consumption also heightens the risk of developing alcohol abuse later in life, particularly for those with a family history of alcoholism. The influence of genes associated with alcohol abuse appears to be strongest during this critical period of brain development.
Debunking the European drinking myth
The idea that continental Europeans have a healthier relationship with alcohol is not supported by scientific evidence. Research suggests that permissive attitudes toward youth drinking do not lead to more responsible consumption later in life.
"The research has shown that the more permissive a parent is with alcohol use, the more likely a kid is to have problems with alcohol later in life," Squeglia states. This contradicts the belief that allowing young people to drink at home with meals teaches responsible alcohol use.
A study by Alexander Ahammer at Johannes Kepler University Linz in Austria found that countries with lower minimum drinking ages do not have healthier drinking cultures. In Austria, where the legal drinking age is 16, binge drinking increases by 25% more than in the US, where the minimum age is 21.
Policy and public perception
Experts agree that the scientific evidence points to delaying alcohol consumption as long as possible. However, raising the legal drinking age to 25 or older is seen as impractical and unpopular.
"I think there's this very little public appetite for a drinking age of 25," says James MacKillop, who studies addictive behavior at McMaster University. "High minimum legal ages are perceived as paternalistic, and they can be seen as hypocritical if the legal age of majority for voting or serving in the military is 18 or 19."
Instead of changing laws, MacKillop suggests improving education about alcohol's risks and its impact on the developing brain. "Just assuming that people will naturally develop responsible habits when it comes to these drugs is a fairly optimistic assumption," he notes.
Global health implications
The World Health Organization has stated that "when it comes to alcohol consumption, there is no safe amount that does not affect health." Alcohol is linked to various cancers, liver disease, and fatal accidents, with even light to moderate consumption posing significant risks.
In the European region, half of all alcohol-attributable cancers are caused by light and moderate drinking, according to WHO data. This challenges the notion of a "healthy" drinking culture and underscores the importance of informed decision-making regarding alcohol consumption.
Advice for young people and parents
Given the scientific evidence, experts advise young people to delay alcohol consumption as long as possible to allow the brain to develop fully. For parents, the research suggests that imposing strict rules around alcohol use is associated with less drinking and fewer alcohol-related risky behaviors among adolescents.
"Our message is delay as long as you can," says Squeglia, "because your brain is still developing, and let your brain develop and be as healthy as it can before you start engaging in things like alcohol and other substance use."
