Weight loss is usually considered a good thing, unexpected and extreme weight loss can be a sign of something in your body going very wrong. There could be some underlying issues that are causing your body to pull weight and nutrition from your muscles and body fat to keep you going. As you grow old, your limbs grow weaker, and same for your muscles, so you do lose some weight as you age, but losing a lot of it too quickly could be a sign of something much worse, Dementia. A recent study published in JAMA Network Open 2025 Cardiometabolic Trajectories Preceding Dementia in Community-Dwelling Older Individuals, has identified potential early indicators of dementia, including significant weight loss and specific digestive changes, appearing years before noticeable cognitive decline.

The study showed that people who later got dementia had their Body Mass Index, or BMI, go down faster than those who stayed healthy. BMI is a way to see if someone's weight is healthy for their height. This drop in BMI started happening many years before they were told they had dementia, sometimes as early as 11 years ago. Also, these people often started with a lower BMI to begin with. So, even though everyone's weight might change a little as they get older, the people who developed dementia had a much bigger and faster weight loss.

What Are Some Other Indicators Of Dementia?

Along with their BMI, the size of their waist also changed. People who ended up with dementia had smaller waist sizes, and this difference was noticeable about 10 years before they were diagnosed. This means that their bodies were changing in ways that showed up long before they or their doctors noticed any problems. So, not only was there weight loss, but also a loss of abdominal fat. This measurement is important because fat around the waist can be related to other health issues.

The study also found changes in their blood. Specifically, the "good" cholesterol, called HDL, went up in people who developed dementia. This increase happened about five years before they were diagnosed. It's tricky because HDL is usually seen as a good thing for your heart. But in this case, it seems like it might be a sign of changes happening in the brain. Scientists are still trying to understand why this happens.

Weight Loss Doesn’t Cause Dementia, Dementia Causes Weight Loss

When we see that people with dementia lose weight, it's easy to think that the weight loss is what caused dementia. But experts think it's the other way around. They call this "reverse causation." This means that the brain changes that cause dementia also cause people to lose weight. The brain changes can affect things like appetite, how the body uses food, and how people go about their daily lives. For example, people might forget to eat, have trouble making meals, or move around less.

While the study revealed a lot about different indicators of dementia and bodily changes, there are many limitations to the study. Everyone loses some weight as they get older. So, it's hard to know when weight loss is just a normal part of aging and when it's a sign of dementia. The study found that people with dementia lost weight faster, but it's still tricky to tell the difference in everyday life. Doctors need to look at other things, like memory tests, to figure out if someone's weight loss is a cause for concern.

If someone is losing weight without trying, and they're also having problems with their memory or thinking, it's important to talk to a doctor. It's not just about the weight loss; it's about the whole picture.

Prime Minister Narendra Modi today launched the nationwide Human Papillomavirus (HPV) vaccination campaign for girls aged 14 years from Rajasthan's Ajmer.

The initiative marks a decisive step towards eliminating cervical cancer through timely HPV vaccination. Cervical cancer remains the second most common cancer among women in India. Nearly 80,000 new cases and over 42,000 deaths are reported annually in the country.

"Today, I have had the opportunity to launch the HPV vaccine campaign from Ajmer. This campaign is an important step towards empowering women and daughters of this country,” PM Modi said.

“For us, this was a sensitive issue tied to the insult of our sisters and daughters, one that made them ill. That is why we resolved it at a crucial turning point in their mission,” he added.

The World Health Organization has also lauded India's mission to launch the HPV vaccine and prevent the risk of cervical cancer.

“We are leaving no stone unturned to ensure that the daughters of the country are healthy and prosperous. The objective of this initiative is the prevention of cervical cancer," the Prime Minister, earlier wrote in a post on social media platform X.

The HPV Vaccination Campaign

The nationwide program, based on expert recommendations of the National Technical Advisory Group on Immunization (NTAGI), will target girls aged 14 years.

At 14, the HPV vaccine offers maximum preventive benefit, well before potential exposure to the virus.

"By prioritizing prevention at the right age, the program is expected to provide lifelong protection and significantly reduce the future burden of cervical cancer in the country," the government said.

“The HPV vaccine works best at 9-14 years, before exposure, and when the immune response is strongest. Studies show effectiveness is highest in younger age groups and decreases with age,” Dr. Parmod Kumar, Associate Professor in Medical Oncology, AIIMS Jodhpur, shared on X.

Vaccination under the national program will be voluntary and free of cost.

The HPV vaccination will be conducted exclusively at designated government health facilities, including Ayushman Arogya Mandirs (Primary Health Centers), Community Health Centers, Sub-District and District Hospitals, and Government Medical Colleges.

Cervical Cancer Burden In South East Asia

Despite being preventable, cervical cancer continues to claim the life of a woman every two minutes globally, and the WHO South-East Asia Region bears nearly one-quarter of the global burden.

Dr. Catharina Boehme, Officer-in-Charge, WHO South-East Asia, stated that the introduction of HPV vaccination at a national scale in India "will have a far-reaching impact". It will accelerate progress not only for the country, but for the region and the world, she said.

“This landmark step, led at the highest level of government, reflects India’s strong commitment to protecting adolescent girls from cervical cancer," said Dr. Boehme.

With today’s milestone, nine of the 10 countries in the Region now include HPV vaccination in their national immunization programs.

The WHO global targets for 2030 include vaccinating 90 percent of girls by age 15, screening 70 percent of women by ages 35 and 45, and ensuring 90 percent of women with pre-cancer and invasive cancer receive appropriate treatment.

As we grow older, it is almost expected that memory will fade. Names slip. Dates blur. Thoughts take longer to form. Inside the aging brain, proteins can misfold and clump together, damaging cells and gradually eroding cognition. But not everyone follows this script.

Some people reach their 80s with memory and mental sharpness that rival those decades younger. Scientists call them “super-agers.” Now, new research published in Nature offers a possible explanation for why some brains hold up so remarkably well.

At the heart of the findings lies one of neuroscience’s most contested questions: can adult human brains grow new neurons?

Read: A Longevity Expert Who Studies 'Super Agers' Eats All THIS In A Day

Can The Aging Brain Grow New Cells?

For years, scientists have debated whether neurogenesis, the birth of new neurons, continues into adulthood. While it is well established in babies and young children, and in many animal species, evidence in adult humans has been mixed.

This new study adds weight to the idea that it does continue, even into advanced age.

Researchers examined brain tissue donated after death from several groups: younger adults with normal cognition, older adults with typical memory for their age, people with mild cognitive impairment, individuals with Alzheimer’s disease, and super-agers over 80 whose memory functioned like someone about 30 years younger.

They focused on the hippocampus, the brain’s memory hub and a region long suspected to be a birthplace for new neurons.

To detect neurogenesis, scientists looked for three types of cells: neural stem cells, neuroblasts, and immature neurons. In simple terms, stem cells are like infants, neuroblasts are adolescents, and immature neurons are on the brink of adulthood.

“We identified genetic markers for three key types of cells,” the researchers explained, tracing the pathway from stem cell to developing neuron.

What Makes Super-Agers Different

All groups showed signs of these cell types. The difference lay in the numbers.

Super-agers had roughly twice as many new neurons as older adults with typical memory, and about two and a half times more than those with Alzheimer’s disease. In fact, their hippocampi contained even more immature neurons than the brains of younger adults.

“This paper shows biological proof that the aging brain is plastic,” Tamar Gefen told The New York Times. She added that this adaptability appears to persist “even into a person’s 80s.”

The immature neurons in super-agers also carried distinctive genetic and epigenetic signatures. According to Gefen, as quoted by The New York Times, “Super-aging happens not only because there’s more of these young cells, but because there is a type of genetic programming” that allows them to survive and resist age-related decline.

In other words, it is not just about quantity. It may also be about resilience.

A Clue For Alzheimer’s Disease?

The Alzheimer’s findings were equally intriguing.

People with Alzheimer’s actually had more neural stem cells than other older adults. But they had far fewer neuroblasts and immature neurons. This suggests that while the starting material was present, the developmental process stalled.

One interpretation is that neurogenesis becomes disrupted in Alzheimer’s. Stem cells may remain dormant, unable to mature into functioning neurons.

“If that’s true, that’s really opened up a new direction for the field,” Hongjun Song told The New York Times, suggesting that reactivating these dormant cells could one day become a therapeutic strategy.

It is an exciting possibility. Instead of only trying to prevent damage, scientists might be able to encourage regeneration.

Not Everyone Is Convinced

The neurogenesis debate is far from settled.

Some researchers argue that methodological differences have led to conflicting conclusions over the years. Shawn Sorrells, who studies neurogenesis, told The New York Times that mapping how the hippocampus changes in people who age differently is “fantastically interesting and important,” but he cautioned that the findings should be validated using additional techniques.

Skepticism remains because detecting new neurons in adult human brains is technically difficult. Results often hinge on the markers and imaging tools used.

What This Means For The Future

Even if this study does not end the debate, it opens new doors. If certain people naturally maintain robust neurogenesis into their 80s, researchers want to understand why. Is it genetics? Lifestyle? A combination of both?

Scientists are now exploring whether the special properties seen in super-agers’ immature neurons can be replicated or supported through medication or other interventions.

The bigger takeaway is hopeful. Aging does not necessarily mean inevitable cognitive collapse. The brain may retain more capacity for renewal than once believed.

If neurogenesis truly persists across the lifespan, the story of brain aging may need rewriting. Instead of focusing only on decline, researchers may increasingly look toward regeneration and resilience.

And for anyone worried about forgetting where they left their keys, that possibility feels quietly revolutionary.

Do you know that congenital hypothyroidism, a rare disability, affects about 1 in 2,500–3,000 newborns globally, but in India, the incidence is higher -- approximately 1 in 1,000 births.

India records nearly 26 million births annually, with an estimated 10,000 babies born each year with Congenital Hypothyroidism.

This means 27 babies are born every day in India, with the condition that more than one is born every hour. Early treatment within the first 2 weeks of life can ensure normal brain development, while delayed treatment can reduce IQ by 30–50 points.

Congenital Hypothyroidism (CH) is a condition present at birth in which a baby’s thyroid gland does not produce enough thyroid hormone.

The thyroid is a small gland located in the neck. It produces a hormone called thyroxine (T4), which is essential for brain development, growth, and overall body metabolism. The thyroid hormone is especially important in the first few weeks of life.

The thyroid hormone helps in:

• Brain development
• Physical growth
• Bone development
• Muscle strength
• Energy regulation

If a baby does not receive enough thyroid hormones soon after birth, it can lead to permanent intellectual disability and growth problems.

The good news is that congenital hypothyroidism is easily detectable and completely treatable if identified early.

What Causes Congenital Hypothyroidism? What Are The Symptoms?

Congenital Hypothyroidism may occur because:

• The thyroid gland is completely absent
• The thyroid gland is underdeveloped
• The gland is present but does not function properly
• Rarely, the baby cannot produce or use the thyroid hormone correctly

One of the biggest challenges with Congenital Hypothyroidism is that most babies look completely normal at birth.

However, over time, some signs may appear:

• Excessive sleepiness
• Poor feeding
• Constipation
• Prolonged jaundice (yellowing of skin and eyes)
• Hoarse cry
• Large tongue
• Puffy face
• Cold or dry skin
• Slow growth

How Is Congenital Hypothyroidism Detected?

1. Newborn Screening Test (Heel-Prick Test)

• This is the most important test.
• A few drops of blood are taken from the baby’s heel.
• It is usually done 48–72 hours after birth, but can be done soon after birth on the cord blood, too.
• Test measures Thyroid Stimulating Hormone (TSH).
• If TSH levels are high, it suggests that the thyroid is not functioning properly.
• This test is simple, safe, quick, and affordable

2. Confirmatory Blood Tests

If the screening test is abnormal, the doctor will order:

• Serum TSH test
• Free T4 (thyroxine) level
• High TSH and low T4 confirm the diagnosis

3. Thyroid Scan

In some cases, imaging tests are needed. The ultrasound of the neck (less accurate) and Nuclear Medicine Thyroid scan (more accurate) may be done to check whether the gland is absent, small, or misplaced. However, treatment should not be delayed while waiting for imaging.

When Should Treatment Start?

Treatment should begin as early as possible -- ideally within the first 14 days of life. Starting treatment within the first two weeks allows normal brain development.

Delaying treatment increases the risk of permanent intellectual disability.

Doctors will monitor:

• TSH levels
• T4 levels
• Baby’s growth and development

Initially, blood tests are done every 2–4 weeks, then less frequently as the child grows. Proper follow-up ensures the dose remains correct. Some babies may need treatment for life.

In certain cases, doctors may reassess thyroid function after 3 years of age to see whether the condition is temporary or permanent. Most children who receive early and proper treatment grow up with completely normal intelligence and physical development.

Can Congenital Hypothyroidism Be Prevented? Why Early Screening Is So Important

Most cases cannot be prevented. However:

• Universal newborn screening can prevent intellectual disability
• Ensuring adequate iodine intake during pregnancy helps reduce risk
• The key is early detection—not prevention

A baby with Congenital Hypothyroidism may look perfectly healthy. Without screening, diagnosis may be delayed until symptoms appear—by then, brain development may already be affected.

With early testing the diagnosis is simple; treatment is affordable; and outcome is excellent. But without testing:

• Intellectual disability can occur
• Growth may be affected
• The child may require lifelong support

Congenital Hypothyroidism is one of the most preventable causes of intellectual disability in children. A small heel-prick test in the first few days of life can protect your baby’s brain forever.

If you are expecting a baby or have a newborn, speak to your doctor about newborn thyroid screening.

Early diagnosis. Simple treatment. Normal life.