Health
Alcohol Consumption Linked to Higher Dementia Risk, Major Study Finds
A major new study has found that alcohol consumption increases the risk of dementia, regardless of whether people are genetically predisposed to the condition. The research adds to mounting evidence that even moderate drinking may be harmful to long-term brain health.
The study, published in BMJ Evidence-Based Medicine, examined data from around 560,000 people in the United Kingdom and the United States, along with genetic information from 2.4 million individuals. Researchers tracked drinking habits and compared them with dementia diagnoses, while also studying genetic markers associated with alcohol use to measure its cumulative impact over a lifetime.
The findings were clear: the more alcohol a person consumed, the higher their risk of dementia. For example, someone who drank three alcoholic drinks per week was found to be 15 percent more likely to develop dementia than someone who consumed just one drink per week.
“For anyone who chooses to drink, our study suggests that greater alcohol consumption leads to higher risk of dementia,” said Stephen Burgess, a statistician at the University of Cambridge and one of the study’s authors.
The analysis also challenged the long-standing belief that low levels of alcohol might offer health benefits. “Genetic evidence offers no support for a protective effect – in fact, it suggests the opposite,” said Dr. Anya Topiwala, senior clinical researcher at the University of Oxford.
While the study does not prove alcohol directly causes dementia, it reinforces strong biological evidence of a harmful link. Tara Spires-Jones, director of the Centre for Discovery Brain Sciences at the University of Edinburgh, who was not involved in the research, noted: “Fundamental neuroscience work has shown that alcohol is directly toxic to neurons in the brain.”
Previous studies have supported these concerns. Brain imaging research has shown that drinking even one or two units of alcohol a day is associated with reduced brain volume and structural changes that may contribute to memory loss and dementia.
Globally, dementia affects more than 55 million people, according to the World Health Organization, and is projected to rise sharply as populations age. With no cure currently available, prevention strategies have become a key focus for researchers and policymakers.
The authors of the latest study argue that reducing alcohol consumption could play an important role in lowering dementia risk. “Reducing alcohol consumption across the population could play a significant role in dementia prevention,” Dr. Topiwala said.
The findings add weight to growing calls for public health campaigns that emphasize the risks of alcohol—not just for the liver and heart, but for the brain as well.
Health
Global Mental Health Cases Near 1.2 Billion as Anxiety and Depression Drive Sharp Worldwide Rise
A major global analysis has found that mental health conditions have surged to an estimated 1.2 billion people worldwide, driven largely by steep increases in anxiety and depression over the past three decades.
The findings, published in The Lancet as part of the Global Burden of Disease Study 2023, show that the number of people living with mental disorders has almost doubled since 1990, marking a 95% rise. Researchers say major depressive disorder and anxiety disorders have seen even sharper growth, increasing by 131% and 158% respectively, making them the most prevalent mental health conditions globally.
The report describes mental illnesses as widespread conditions that create long-term disability and significant human suffering. It also highlights broader consequences for economies and public services, including reduced productivity, lower workforce participation and increasing pressure on health and welfare systems.
Researchers estimate that in 2023 alone, around 620 million females and 552 million males were affected by mental health conditions. While the overall burden is rising across both sexes, the study points to notable differences in the types and prevalence of disorders.
Among women, depression and anxiety were the most commonly reported conditions, alongside higher rates of eating disorders such as anorexia nervosa and bulimia nervosa. The report links this disparity to a mix of biological, social and structural factors, including exposure to domestic violence, sexual abuse, gender inequality and reproductive health-related changes.
In contrast, neurodevelopmental and behavioural disorders, including attention deficit hyperactivity disorder (ADHD), conduct disorder and autism spectrum conditions, were more frequently diagnosed in men.
Teenagers aged 15 to 19 were identified as the group experiencing the highest mental health burden globally, raising concerns about early onset of conditions and insufficient preventive care for young people.
The study identifies several key risk factors associated with mental illness, including childhood sexual violence, bullying and intimate partner violence. These factors are strongly linked to conditions such as depression, schizophrenia, bipolar disorder and anxiety disorders. However, researchers note that such exposures have remained relatively stable over time and account for only a portion of the overall rise.
According to the authors, broader drivers are likely contributing to the increasing prevalence of mental disorders. These include genetic and biological influences, poverty, inequality, and the growing impact of global crises such as armed conflict, pandemics, natural disasters and climate-related stress.
While mental health conditions have long been a leading cause of disability worldwide, the report warns that the situation is worsening. At the same time, health systems have not expanded services at a pace matching demand.
The authors caution that the gap between rising need and limited access to care is becoming more pronounced, leaving millions without adequate treatment or support.
Health
Europe Records Sharp Rise in Sexually Transmitted Infections, ECDC Warns
Health
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