As people age, so does the concern about cognitive decline and dementia. With no absolute cure for Alzheimer's and other types of dementia, efforts to prevent it have become a critical public health priority. Perhaps one of the most widespread perceptions among wellness communities and social circles is that doing puzzles—whether Sudoku, crosswords, or jigsaw—will safeguard the brain against cognitive loss. But is there any science to support this brain-bolstering hype? Can a daily puzzle really help prevent dementia?

Based on the National Poll on Healthy Aging by the University of Michigan, most adults between the ages of 50 and 64 are concerned about getting dementia. Nonetheless, only 5% mentioned that they had talked with their doctors about taking preventive measures to lower this risk. Instead, most used brain teasers or vitamins in the hope of protecting their minds.

Although large health organizations such as the World Health Organization and the Global Council on Brain Health have dispelled the efficacy of supplements in preventing dementia, mentally stimulating activities—such as puzzles—continue to enjoy increasing support in scientific literature, albeit with qualifications.

A large UK observational study, which is part of the online PROTECT study of brain aging, used data from more than 19,000 healthy adults aged between 50 and 93. Participants who participated in word or number puzzles regularly had better cognitive function in various domains, including spatial working memory, verbal reasoning, attention, and reaction time.

Notably, various puzzles appeared to challenge different areas of the brain. Puzzles with words were correlated with enhanced grammatical thinking, whereas puzzles involving numbers such as Sudoku were connected with enhancement of executive abilities such as planning and organization.

But the biggest lesson learned wasn't which puzzle was superior—it was how often people did these cognitively challenging activities. People who solved puzzles at least monthly had improved cognitive scores all around compared to those who never did.

Correlation vs. Causation: What's Reducing Dementia Risk?

Even with these encouraging correlations, specialists warn that cause-and-effect conclusions should not be drawn directly. Observational studies such as PROTECT cannot say whether puzzle-solving enhances thought or if individuals with more robust brain powers are inherently inclined to such pursuits.

Yet another limitation is that most studies have not yet separated out lifelong puzzle enthusiasts from those who started solving them later in life. It becomes challenging to determine long-term impacts of puzzle work on dementia onset individually.

The Bronx Aging Study, a 20-year longitudinal study, discovered that older adults who consistently worked on crossword puzzles postponed the onset of dementia by an average of 2.54 years. Although not a guarantee against cognitive decline, this postponement is significant and supports the theory that cognitively stimulating activities can contribute to what's called "cognitive reserve"—the brain's capacity to deal with or compensate for damage.

Role of Brain Puzzles in Preventing Dementia

So, then, can puzzles prevent dementia? Not exactly. But can they slow down cognitive decline? Maybe. And unlike supplements, puzzles pose no health risk, so they are a safe and possibly useful part of a larger brain health plan.

As Dr. Teresa Gomes-Osman cited in the 2020 Lancet Commission Report on Dementia Prevention, lifestyle factors that can be changed—like education, exercise, treating depression, limiting air pollution exposure, and others—combined explain as much as 40% of dementia cases. Mental stimulation, such as puzzle-solving, is a perfect fit on the "cognitive reserve" side of this equation.

Which Puzzles Work Best To Reduce Dementia Risk?

Sudoku

Excellent for building numerical reasoning, Sudoku exercises the mind in logical reasoning, pattern identification, and problem-solving. Its deceptively simple format hides the sophisticated cognitive stimulation it provides.

Riddles

These exercise critical thinking, recall of memory, and lateral thinking. Riddles also hone verbal abilities and understanding in everyday applications.

Word Search

This tried-and-tested puzzle aids in better vocabulary, concentration, and observation. It enhances the brain's liaison with language—a fundamental thinking function during aging.

Jigsaw Puzzles

Fun and healing, jigsaws engage both the visual and memory parts of the brain. The coordination involved assists with motor functions and spatial understanding, and they can also be an excellent social activity.

Ways Puzzles Help Keep your Brain Healthy

Puzzles must be viewed as part of the brain-health puzzle, but only one piece. Puzzles work as part of a multi-pronged strategy to prevent dementia that also includes:

Physical exercise: Exercise maintains neuroplasticity and circulation to the brain.

Social engagement: Solitude is a recognized risk factor; remaining socially engaged maintains emotional and mental well-being.

Balanced nutrition: A Mediterranean-type diet with lots of leafy greens, whole grains, and healthy fat supports brain function.

Medical management: Treating hearing loss, hypertension, and diabetes is crucial for brain health.

While we’re still a long way from declaring puzzles as the magic bullet against dementia, research continues to reinforce the value of mental activity in supporting brain health. Puzzles challenge the brain, offer therapeutic value, and—when combined with a healthy lifestyle—can be an enjoyable and effective part of cognitive aging.

So the next time you grab a crossword or open up a Sudoku grid, you may be doing your brain a long-term favor.

Metformin is a safe and effective drug used by type 2 patients for the last six decades to control their blood sugar levels and improve the way the body handles insulin.

A recent study showed that metformin can also be crucial in reducing the risk of vision loss in people over the age of 50, known as age-related macular degeneration (AMD).

The observational study, published in the BMJ Open Ophthalmology, showed that metformin can cut down the cases of AMD by nearly 40 percent in people with Type 2 diabetes over five years.

“We have found a significant association between metformin use and a reduction in the incidence of intermediate AMD by 37 percent in people with diabetes over 5 years. Previous epidemiological studies of metformin and AMD have used secondary data on AMD,” said corresponding author Nicholas A. V. Beare, from the University of Liverpool, UK.

“Given metformin’s anti-aging therapeutic effects, the reduction in risk is plausible and warrants prospective clinical trials,” he added.

Also read: Metformin Controls Blood Sugar With Help From Brain Neurons, Finds Study

Metformin And AMD

While currently there is no specific treatment option for AMD — a common cause of blindness in high-income countries — scientists have shown interest in metformin as a candidate drug for treating AMD and reducing its progression.

It is because of metformin's antioxidant, anti-inflammatory, antiangiogenic, and antifibrotic effects. Metformin is also postulated to delay ageing and ageing-related diseases.

Previous research has also identified metformin as a potential treatment for all stages of AMD. Researchers also noted that the common diabetes drug is readily accessible and has a strong safety profile.

How Metformin Improves AMD

The BMJ study analyzed more than 2,500 participants aged 50 or above who attended retinopathy screening in 2011.

All participants had Type 2 diabetes and gradable fundus photographs — high-quality retinal images.

Individuals prescribed oral metformin had a 37 percent lower risk of intermediate AMD by five years. The results are consistent with known biological mechanisms, given metformin’s potential favourable effects on AMD progression, researchers reported, the researchers said.

The team, however, acknowledged limitations such as a lack of proper data regarding the dose, duration of prior use, or compliance with metformin use.

Further, there were only a relatively small number of participants developing advanced AMD – an inevitability in population-based studies. They urged for a clinical trail to prove metformin's potential in treating AMD.

Also read: World Sight Day: 10 Tips To Help Prevent Vision Loss In Elderly

What Is AMD?

Age-related macular degeneration (AMD) is a disease of the retina. It happens when a part of the retina called the macula is damaged. It results in the loss of sharp, straight-ahead vision.

The condition commonly affects adults over 50, and causes

• blurry vision,
• dark spots,
• distorted straight lines.

While AMD rarely causes total blindness but affects central vision, making reading and driving difficult. It is of two types:

• Dry Age-Related Macular Degeneration
• Wet Age-Related Macular Degeneration

Harry Potter star Daniel Radcliffe has quit smoking after 20 long years. The reason: his two–year–old son with girlfriend Erin Darke.

Speaking to media outlet Vulture, the 36-year-old English actor shared that after becoming a father, he was inspired by intrusive thoughts about his mortality, which enabled him to quit the deadly habit after two decades.

"I smoked for 20 years pretty heavily, and I was never even thinking about quitting, and then shortly after having my son, the intrusive thoughts of my own death really helped as an incentive to quit," Radcliffe was quoted as saying.

Radcliffe also shared how a book -- The Easy Way to Quit Smoking, by Alan Carr -- helped him decide to quit smoking.

"It may not work for everybody, but it really worked for me," noted the star, currently starring in the Broadway play Every Brilliant Thing.

Earlier this month, the actor spoke with WSJ Magazine and shared that from being on “cigarettes all day”, he's transformed into a fitness freak.

How Does Smoking Affect Our Body?

Smoking can affect all organs in our body. While lung cancer and tuberculosis are the most prominent ones, smoking can seriously increase the risk of several chronic diseases. These include:

• Heart Disease
• Asthma
• Reproductive Health
• Vision Loss
• Chronic Obstructive Pulmonary Disease
• Cancers of the liver, stomach, and colon.

While quitting tobacco is important, it is a difficult task, with some people finding it harder to quit than others. It may be important to seek help quitting.

Also read: Cigarettes And The Female Body: The Hormonal Toll We Don’t Talk About

What Happens When You Stop Smoking?

• In just 20 minutes of stopping, your blood pressure and heart rate begin to normalize.
• Within a few weeks, your lung function improves.
• Over time, the risk of heart disease and cancer also decreases dramatically.

These strategies have shown varying levels of success in aiding smokers to quit permanently. In addition, alternative methods like e-cigarettes and mindfulness-based techniques have gained traction in helping reduce smoking addiction.

Science-backed Methods To Help You Quit Smoking

Behavioral Support

Quitting smoking isn’t just about resisting cravings. Often, behavioral support through counseling or therapy is crucial for tackling the psychological aspects of addiction. Behavioral therapy involves working with a trained professional to identify triggers, develop coping strategies, and create a tailored quit plan. Research shows that combining counseling with other quit methods can significantly increase success rates.

Prescription Medications

Some medications, such as varenicline (Chantix) and bupropion (Zyban), have been shown to help people quit smoking by reducing cravings and withdrawal symptoms. Experts suggest that varenicline works by blocking the effects of nicotine in the brain, while bupropion is an antidepressant that helps manage withdrawal symptoms. Both medications are generally more effective when combined with behavioral therapy.

Nicotine Replacement Therapy (NRT)

Nicotine replacement products, such as nicotine patches, gums, lozenges, and nasal sprays, deliver controlled amounts of nicotine to ease withdrawal symptoms. According to experts at Harvard Health, NRT can double the chances of quitting by alleviating physical cravings while the person works on overcoming the psychological addiction.

About 10.6 percent –15 percent of India's population suffers from some form of mental health conditions, with 15 percent of the adult population also requiring active intervention.

To enable researchers to gather as well as systematically document data on patients with major forms of mental illness, neuroscientists in India have developed CALM-Brain — a digital repository of data on brain structure and function from a range of psychiatric disorders.

CALM-Brain contains data from over 2,000 participants from 900 families across the country.

CALM-Brain will help clinicians and researchers

• to understand the onset of neuropsychiatric disease
• check progression
• decode underlying biological changes
• provide better diagnosis
• plan personalized treatments for patients.

“CALM-Brain was conceived as a method to assemble data from multiple scales of analysis of brain structure and function on a single platform. We believe that the application of modern methods of data analysis to this dataset will help bridge the gap between these scales of analysis,” said Prof. Raghu Padinjat, CBM co-ordinator at CBM-NCBS, in a statement.

Also read: World Happiness Report 2026 Flags Social Media Harms On Adolescents' Mental Well-being

What Is CALM-Brain?

CALM-Brain is the result of collaborative efforts of researchers at the Rohini Nilekani Centre for Brain and Mind (CBM) — a partnership between the National Institute of Mental Health and Neuro Sciences (NIMHANS) and the National Centre for Biological Sciences (NCBS) - TIFR.

CALM-Brain is India’s first-of-its-kind repository of clinical, neuroimaging, behavioral, genetic, and other datasets on disorders such as:

• addiction,
• bipolar disorder,
• dementia,
• obsessive compulsive disorder (OCD)
• schizophrenia.

• Functional Magnetic Resonance Imaging (fMRI)
• Near Infrared Spectroscopy (NIRS)
• electroencephalogram (EEG)
• observations of cognition
• eye-tracking
• genetic analyses of blood samples
• clinical assessments.

The dataset is also linked to a biorepository of stem cells, which can be used to perform biological research in psychiatry to understand the origins of such severe mental illnesses.

“The primary goals of the project are to identify biological markers of severe psychiatric illnesses, which cut across traditional diagnostic frameworks. In addition, we will try to identify fundamental biological mechanisms of the disease and medication response,” said Prof. Y.C. Janardhan Reddy, CBM coordinator at CBM-NIMHANS.

Burden Of Mental Illnesses In India

Mental wellness is a major health and economic concern in India. The World Health Organization (WHO) estimates India’s economic loss due to mental health conditions to be USD 1.03 trillion (2012-2030).

Recently, health experts and policymakers, as part of the government-led Post-Budget Webinar series, highlighted the growing burden of mental and neurological disorders in India and also stressed the urgent need to strengthen institutional capacity to meet emerging healthcare demands.

"One in seven Indians is affected by mental health disorders, while several states continue to face a treatment gap ranging from 70 to 90 percent," the experts said.

They added that "neurological and mental health conditions are among the leading contributors to disability-adjusted life years (DALYs)" among citizens.

To address the rising burden, the government aims to launch NIMHANS-2 — first announced by Finance Minister Nirmala Sitharaman during the Union Budget 2026-27 — to deliver specialized care for mental health and neurological disorders in north India.

"In addition, the Central Institute of Psychiatry, Ranchi, and the Lokopriya Gopinath Bordoloi Regional Institute of Mental Health, Tezpur, will be upgraded as regional apex institutions to strengthen mental healthcare services in the eastern and north-eastern regions," FM Sitharaman said.