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.

When John Cena started noticing blurry vision, he assumed it was simply part of getting older. But the worsening eyesight was also accompanied by redness, itchiness and crusting around his eyes.

“I had a lot of redness and itchiness, and every once in a while, waking up with eye crusties and stuff. At the same time, given my age — I'm 49 now — my vision was going a little bit, so I just figured it was par for the course. But because my vision was going, I needed to see if I needed glasses or prescriptions.”

Until then, Cena had delayed getting his eyes checked. He believed that the symptoms were caused by bright lights, excessive screen time or ageing.

However, an eye examination gave him a surprise. Cena learned that his symptoms were caused by Demodex blepharitis, a condition he says he had never heard of.

“Diagnosed with Demodex blepharitis, which I didn't even know existed.”

What Are Demodex Mites?

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Demodex mites are tiny, eight-legged organisms that live naturally on human skin, particularly around hair follicles. Measuring just 0.15 to 0.4 millimeters, they are invisible to the naked eye but are present on the skin of almost every adult.

These microscopic mites feed on sebum (the skin's natural oil) and dead skin cells, helping remove accumulated debris under normal conditions.

How Do Demodex Mites Work?

Demodex mites are most active at night. They emerge from hair follicles after sunset because ultraviolet (UV) light is harmful to them. While people sleep, the mites feed, crawl and reproduce on the skin's surface.

They are also believed to be stimulated by melatonin, the hormone that helps regulate sleep, creating a unique relationship between humans and these naturally occurring organisms.

When Can Demodex Mites Become A Problem?

Although harmless in small numbers, Demodex mites can cause problems if they multiply excessively—a condition known as demodicosis.

According to Dr. Richard Locksley, professor of medicine at the University of California, San Francisco, an overgrowth of Demodex mites can contribute to:

• Rosacea
• Blepharitis (eyelid inflammation)
• Acne-like breakouts
• Itchy, inflamed skin

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People with weakened immune systems are particularly vulnerable because their bodies may be less able to control mite populations. In addition, inadequate sleep may increase oil production, providing more nourishment for the mites.

Should You Be Worried?

For most healthy people, Demodex mites are a normal part of the skin microbiome and are not considered harmful. Problems generally arise only when their numbers increase significantly.

To help reduce the risk of overgrowth:

• Wash your face every night with a gentle, non-comedogenic cleanser to remove excess oil and debris.
• Remove eye makeup and false eyelashes before bed, as these can encourage mite buildup.
• Get adequate sleep, since poor sleep may increase sebum production.
• Consult a dermatologist if you experience persistent redness, itching or inflammation around the eyes or skin.

A stroke can happen suddenly and without warning, making every minute count. The first 60 minutes after the onset of stroke symptoms are crucial because timely medical treatment can help reduce brain damage and improve recovery.

What is a Stroke?

A stroke happens when the blood flow to an area of the brain is cut off due to either the blockage of a blood vessel supplying that area or the bursting of the said blood vessel. Without adequate blood flow, brain cells are deprived of oxygen and nutrients and begin to be damaged within minutes.

What Happens During the Golden Hour?

The first hour after a stroke is focused on rapid assessment and treatment. Once the patient reaches the hospital, doctors evaluate the symptoms, determine when they started, and perform an urgent brain scan, usually a CT scan, to identify the type of stroke.

This step is important because treatment depends on whether the stroke is caused by a blocked artery (ischemic stroke) or bleeding in the brain (hemorrhagic stroke). For eligible patients with an ischemic stroke, clot-dissolving medication or a procedure to remove the clot may be considered.

Although treatment windows may extend beyond the first hour for some patients, reaching the hospital as early as possible offers the greatest chance of saving brain tissue. In most patients, clot-dissolving medication is given within 4.5 hours of symptom onset, while selected patients may be eligible for treatment up to 9 hours. Mechanical clot removal is generally performed within 6 hours, although carefully selected patients may benefit from the procedure up to 24 hours after symptoms begin. However, earlier treatment is associated with better protection of brain tissue and improved outcomes.

Know the Warning Signs

Recognizing stroke symptoms early can help save valuable time. The BEFAST acronym is a simple way to remember the common warning signs:

B – Sudden loss of balance or coordination

E – Sudden vision loss or changes in one or both eyes

F – Face drooping

A – Arm weakness

S – Speech difficulty

T – Time to call emergency medical services

Other symptoms may include sudden loss of vision, dizziness, difficulty walking, numbness on one side of the body, confusion, or a sudden, severe headache.

Why Every Minute Matters

During a stroke, brain cells continue to be damaged as blood flow remains interrupted. Delays in reaching the hospital can limit treatment options and increase the risk of long-term disability. Seeking medical care as early as possible gives doctors the best chance to provide appropriate treatment.

What Should You Do?

If you notice stroke symptoms in yourself or someone else, do not ignore them or wait for them to improve. Call emergency medical services immediately and note the time the symptoms first appeared, as this information helps doctors decide the most suitable treatment.

The golden hour is a critical window during which timely action can significantly improve outcomes. Recognizing the signs of stroke and seeking immediate medical care can make a meaningful difference in recovery.

Massive wildfires have ravaged several parts of Canada and other regions of the world, filling the air with hazardous smoke. This has triggered health warnings far beyond the fire zones.

While most people experience immediate breathing problems during and after wildfires, experts say that some health effects can persist long after the skies clear.

Why Is Wildfire Smoke Harmful?

Wildfire smoke is composed of harmful gases and microscopic particles known as PM2.5. These tiny particles are small enough to travel into our lungs and enter the bloodstream, where they can trigger inflammation throughout the body.

Unlike typical air pollution, wildfire smoke also contains toxic substances released from burning homes, plastics, furniture, vehicles, electronics, and industrial materials, making prolonged exposure particularly harmful.

Long-Term Health Risks After Wildfire Exposure

Also read: Delhi's Poor AQI, Monsoon Conditions Put Children's Lungs at Risk: Ways to Keep Kids Safe

Lung And Chronic Respiratory Disease

Prolonged exposure to wildfire smoke can have long-term effects on the respiratory system. Possible health effects may include:

• Persistent cough
• Poor lung function
• Worsening asthma symptoms
• Increased COPD episodes
• Greater risk to respiratory infections

Children, older adults, and people with existing lung conditions face the highest risk because their lung function is already compromised.

Heart Disease

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The tiny particles in wildfire smoke don't just stay confined to the lungs. Once they enter the bloodstream, they can affect the cardiovascular system. In the long run, research says wildfire smoke exposure can lead to:

• Heart attacks
• Stroke
• Irregular heart rhythms
• Elevated blood pressure
• Increased inflammation in blood vessels
• Effects on Brain Health

With frequent incidences of wildfires, scientists are looking into how wildfire smoke affects the brain. Emerging evidence suggests smoke exposure may contribute to:

Headaches

• Difficulty concentrating
• Memory problems
• Cognitive decline
• Increased inflammation affecting brain function

Mental Health Consequences

Wildfires can affect mental health in more than one way. Besides the stress of evacuation and property loss, smoke exposure itself may contribute to mental health problems directly. One is at the risk of the following mental health issues after exposure:

• Anxiety
• Depression
• Post-traumatic stress disorder (PTSD)
• Sleep disturbances

Communities repeatedly exposed to wildfire events may experience prolonged psychological distress that could often go undetected.

Possible Cancer Risk

Growing evidence suggests that long-term exposure to wildfire smoke may increase the risk of several cancers. Studies have reported possible associations with lung cancer, breast cancer, colorectal cancer, bladder cancer, and certain blood cancers

Although researchers say more studies are needed to establish a direct cause-and-effect relationship, the findings highlight the importance of limiting repeated smoke exposure.

Also read: How Air Pollution Puts Heart Patients At Risk - What You Can Do About It

Pregnancy And Infant Health

Pregnant women are among the groups considered most vulnerable to wildfire smoke. Research suggests exposure during pregnancy may increase the risk of preterm birth, low birth weight and other pregnancy complications.

Healthcare providers recommend minimizing outdoor exposure whenever air quality deteriorates.

How To Protect Yourself After Wildfire Exposure?

Even after visible smoke disappears, harmful particles may remain in the air. Experts recommend:

• Monitor local air quality before going outdoors.
• Stay indoors when pollution levels are high.
• Use HEPA air purifiers if available.
• Wear a well-fitted N95 mask if exposure is unavoidable.
• Keep doors and windows closed when it is smoky outside.
• Continue taking prescribed medications for asthma or heart disease.
• Seek medical attention if coughing, chest pain, breathlessness, or other symptoms persist.