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.

The internet is obsessing with the idea that Japan has a fat law, it fines people for being "fat". Talk about sensational headlines, mistranslations, and social media exaggerations. But what does Japan's so-called 'fat law' actually say? Does it really change anything?

Health and Me did a closer fact check on Japan's Fat Law, and here is what we found.

Japan's Metabo Law: What It Really Means?

In 2008, the Japanese Ministry of Health, Labour and Welfare introduced the Metabolic Syndrome Countermeasures Promotion Law, which was popularly nicknamed the 'Metabo Law'. the word 'metabo' comes from metabolic syndrome, a cluster of high-risk conditions that include elevated blood pressure, high blood sugar, abnormal cholesterol, and excess fat around the waist. If left untreated, this could increase the risk of heart attacks, stroke and diabetes.

The law's main focus is on identifying these risks as early as possible. As part of Japan's long-standing annual health check tradition, about 50 to 56 million adults aged 40 to 74 undergo this mandatory waist measurements every year. The waistline thresholds are:

• 85cm for men
• 90cm for women

While the numbers are not arbitrary, they match the International Diabetes Federation's guidelines used to screen metabolic risks.

Is It Illegal To Be Overweight In Japan?

The Times-Union fact check confirms: "Japanese citizens cannot be fined or imprisoned for being overweight". RosePlus Japan also reports that the term "fat tax is a mistranslation and that "it is not illegal to be fat in Japan".

The law does not:

• Fine individuals for their weight
• Send people to jail for being overweight
• Deport or deny visas based on size
• Ban obese people

How Does The Law Actually Work?

The law basically shifts the responsibility away from individuals to governments and employers.

Annual measurement: Employers and local authorities measure the waistlines of eligible adults.

If someone exceeds the limit:

• They are offered counseling, health guidance, and follow-ups.
• After three months, progress is reviewed.
• After six months, they may receive additional health education.

No individual penalties: There is no fine for not losing weight.

Employer penalties:

• If a company fails to reduce the percentage of employees at risk, it may face increased contributions to national healthcare funds.
• Companies like NEC previously estimated potential fines of up to $19 million for not meeting targets

This structure makes the Metabo Law more of a workplace wellness mandate than a personal weight regulation.

Lost In Translation

Much of the misunderstanding comes from how Japanese concepts were translated in English. With the word "law" being reported internationally, it implied a strict legal prohibition.

"Metabo" was incorrectly equated was being "fat", losing its medical meaning.

Was The Law Successful?

• Japan already had one of the lowest obesity rates in the world, around 3.5 percent in 2009, compared to over 30 percent in many Western countries.
• Life expectancy in Japan has remained among the highest globally.
• However, obesity rates among men (based on BMI 25+) reportedly continued rising, reaching 31.7 percent in 2022 according to The Japan Times, as cited in the HR Digest analysis

However, there have been things that changed since 2008. This includes companies offering nutrition workshops, physical activity support, health check programs for employees and their families. The annual health checks are now more structured. People flagged for metabolic syndrome were connected with counselling and monitoring, which can reduce long-term medical costs. The conversation has now also shifted towards body autonomy, public health and role of employers in personal wellness.

In a what doctors call an "exceptionally rare event', a Michigan man has died of rabies after receiving a kidney from a donor who was unknowingly infected with the virus. A recent report from the Centers for Disease Control and Prevention (CDC) gives information on how this rare medical event took place, with a surprising chain of exposures that vegan with a skunk scratch.

A Routine Kidney Transplant That Took a Sudden Turn

The Michigan patient underwent a kidney transplant at an Ohio hospital in December 2024. For several weeks, he seemed to be recovering normally. About five weeks after the procedure, he suddenly developed worrying symptoms such as tremors, weakness in his lower limbs, confusion and urinary incontinence. His condition deteriorated quickly and he was admitted to the hospital, soon requiring ventilation. Despite treatment, he passed away. Postmortem tests confirmed that he had rabies, a diagnosis that shocked doctors since his family said he had not been around any animals.

The Donor’s Skunk Encounter Comes to Light

The unexpected diagnosis pushed doctors to take another look at the kidney donor, a man from Idaho. In the Donor Risk Assessment Interview, he had mentioned that a skunk had scratched him. At the time, this detail did not raise major concern. When investigators spoke to the donor’s family again, they learned more about the incident. A couple of months before his death, the donor had been holding a kitten in a shed on his rural property when a skunk approached and behaved aggressively. He stepped in to protect the kitten and managed to knock the skunk unconscious. Before that happened, the animal scratched his shin deeply enough to draw blood. He believed he had not been bitten, and the incident was never viewed as a medical emergency.

The Donor’s Rapid Decline

Around five weeks after the skunk encounter, the donor began showing symptoms that closely resemble rabies. He became confused and had trouble swallowing and walking. His family said he experienced hallucinations and complained of a stiff neck. Two days later, he was found unresponsive at home after what was believed to be a cardiac arrest. He was resuscitated and hospitalized but never regained consciousness. He was declared brain dead after several days, and his organs, including his left kidney, were donated.

What Investigators Found

Once rabies was detected in the kidney recipient, authorities examined stored laboratory samples from the donor. These tests were initially negative. However, kidney biopsy samples revealed a strain that matched silver-haired bat rabies. This finding suggested that the donor had in fact died of rabies and unknowingly passed the virus to the transplant recipient.

Investigators believe a likely three step transmission occurred. A bat infected a skunk, the skunk infected the donor, and the donor’s kidney infected the recipient. The CDC noted that only three other cases of rabies transmission through organ transplantation have been reported in the United States since 1978.

Steps Taken to Protect Other Recipients

Three other people had received cornea grafts from the same donor. Once the risk was identified, the grafts were removed and all three individuals received Post Exposure Prophylaxis. They remained healthy and showed no symptoms.

A Reminder of Rare but Real Risks

Rabies is not routinely tested for in organ donors because human cases are extremely rare and difficult to diagnose. In this situation, the donor’s earlier symptoms were attributed to existing health conditions. Speaking to the New York Times, Dr Lara Danziger-Isakov said the case was exceptionally rare and reminded the public that the overall risk to transplant recipients remains very small.

Delhi continues to wake up to thick haze on Wednesday morning, with 28 stations in 'poor' category, while nine stations remained under 'very poor'. Though there is a slight improvement as the average AQI stood at 269, in poor category. The Chief Minister of Delhi has enforced stricter measures like imposing fines up to Rs. 5,000 for open burning, and use of coal and firewood.

Delhi pollution has now affected people way beyond their respiratory health, it has now attacked almost all organs of their body, including fetus, reproductive health, liver, kidneys, and even chronic diseases like diabetes, obesity, blood pressure, and even mental health illness.

But could Delhi do more? Right now all the measures, including emergency measures like GRAP have not worked more than a dent. However, China seems to have reverse its pollution problem.

What Did China Do That Delhi Too Can Adopt?

In 2013, Beijing was battling with pollution problem. As per the data by the World Health Organization (WHO), in 2013, the annual means of PM2.5 levels reached 64.9 micrograms per cubic meter, whereas, in India, it was at 58.2. However, by 2019, China was able to bring it down to 38.15 micrograms per cubic meter while India remained at 50.17.

So, what did China do?

Since 2013, almost 80% of China has experienced air quality improvement. Beijing declared a war on pollution by shutting 3,000 coal boilers, which slashed coal use by 30%. It also forced factory to either close or comply with the guidelines. Clean energy also replaced soot and electric buses replaced diesel ones. The subway was expanded to 1,000 kilometers and by 2020, 40% of new cars were electric.

Chin's 11th Five Year Plan That Made Pollution A Priority

In the late 2000s, China began taking air pollution more seriously than ever. As per the UCLA Law professor Alex L Wang, China's 11th FYP (2006-10) made pollution a priority and used the "cadre evaluation system". This pushed officials to meet environmental targets. The system evaluates governors, mayors, and local leaders based on how well they perform compared to others in tackling pollution problem, which influences their promotions.

To cut pollution, China invested heavily in cleaner technology and shut down old, highly polluting factories such as power plants, smelters, and chemical units. The government also encouraged the shift to electric vehicles. Even though much of China’s electricity comes from coal, EVs still produce fewer emissions overall and create no tailpipe pollution in cities.

By 2017, Shenzhen became the first city in the world to fully electrify its 16,000 buses. Shanghai too followed its lead.

Studies by Tsinghua University and the Beijing Environmental Bureau showed that between 2013 and 2017, major improvements in air quality came from reducing coal boiler use, cleaner home heating, shutting down polluting industries, and controlling vehicle emissions.

The result was nothing less than remarkable. From 2013 to 2017, Beijing’s PM2.5 levels dropped by 35%, and life expectancy rose by 4.6 years.