Health
Helping Others May Slow Cognitive Decline in Older Adults, Study Finds
Older adults who regularly assist others — whether through formal volunteering or informal acts of kindness — may experience slower cognitive decline, according to new research published in the journal Social Science and Medicine.
The study, which tracked brain health data from more than 30,000 Americans aged 51 and older between 1998 and 2020, found that those who frequently helped people outside their own households maintained higher levels of cognitive function over time compared with those who did not.
Researchers examined both organised volunteering, such as participation in community groups, and informal helping, like assisting neighbours or friends. Surprisingly, the study revealed that informal support offered comparable cognitive benefits to more formalised volunteering roles — challenging assumptions that only structured, socially recognised activities provide meaningful health gains.
“It was a pleasant surprise to find that [informal helping] provides cognitive benefits comparable to formal volunteering,” said Sae Hwang Han, assistant professor of human development and family sciences at the University of Texas and one of the study’s authors.
The cognitive gains were evident even with modest commitments of time. Participants who helped others for just two to four hours a week still saw significant brain health advantages, and sustained engagement appeared to compound the benefits over the years.
“The cognitive benefits of helping others weren’t just short-term boosts but cumulative over time with sustained engagement,” Han noted.
While the findings are encouraging, the authors acknowledged limitations. The study relied on self-reported data and did not track the exact nature of participants’ helping activities. As a result, researchers cannot definitively prove that volunteering directly causes better brain health, though the association aligns with previous studies.
Earlier research has linked volunteering with improved cognitive performance, with some evidence suggesting the effect is particularly pronounced in women. Yet opportunities for older adults to volunteer remain limited. In the European Union, for example, official programmes like the European Solidarity Corps target people aged 18 to 30, leaving older age groups without equivalent large-scale initiatives.
In 2021, the European Commission’s Green Paper on Ageing recommended that older adults engage in volunteering, though it framed the benefits in terms of intergenerational connection and self-esteem rather than brain health.
Han said the new findings strengthen the case for creating more avenues for older adults to contribute to their communities — for their own wellbeing as much as for those they help.
“This suggests the importance of keeping older adults engaged in some form of helping for as long as possible, with appropriate supports and accommodations in place,” he said.
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
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Health
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