From controlling body temperature and flushing out toxins, adequate hydration plays a vital role in our general health and well-being, water is a life essential. However, while dehydration garners significant attention, overhydration, or drinking excessive amounts of water, is a condition that can have serious and sometimes fatal consequences.

Although it may sound bizarre since drinking water is said to be the solution for most health related problems it is important to recognize how much water is considered "too much" or the risks involved with being overhydrated can maintain a healthy balance.

What Is Water Intoxication?

Water intoxication, also termed hyperhydration, water poisoning or water toxemia, develops when an individual drinks much more water than the kidney can excrete. The main function of the kidneys in the human body is the processing and excretion of excess water. However, the human kidneys can process only up to 0.8 to 1.0 liters of water at a time. Drinking an amount that exceeds this may overwhelm the kidneys and put the electrolyte balance out of sync in the human body.

Electrolytes, especially sodium, are essential in maintaining fluid balance within and outside cells. Hyponatremia is the condition when sodium levels fall below 135 mmol/L, resulting from excessive water intake. This causes water to shift into cells, swelling them. In the brain, this can cause severe complications, including coma or even death.

Symptoms of Water Intoxication

The symptoms of water intoxication vary from mild to severe. Early symptoms are often similar to dehydration, which makes self-diagnosis challenging. Common symptoms include:

• Headaches
• Nausea and vomiting
• Muscle cramps or weakness
• Fatigue or drowsiness
• Confusion and disorientation

In more serious cases, water intoxication can cause seizures, loss of consciousness, or swelling in the brain. These complications can be fatal if left untreated.

A notable case occurred in 2007 when a woman participating in a water-drinking contest tragically died after consuming nearly two gallons of water in under two hours. More recently, actress Brooke Shields experienced a grand mal seizure attributed to excessive water consumption.

Causes of Water Intoxication

Water intoxication is rare, but certain scenarios can increase the risk:

1. Sporting Events and Endurance Training

These endurance athletes are prone to water intoxication, especially if they drink large amounts of water without replacing lost electrolytes. Hyponatremia usually happens during long races or marathons as individuals mistake fatigue and muscle cramps for dehydration and continue drinking water in excess.

2. Military Training

Overhydration among military personnel is usually due to severe physical activity in extreme environmental conditions. The total number of hyponatremia cases documented from 2007 through 2022 for the active duty in the United States exceeds 1,600, with a note to this problem on exertion-related overhydration.

3. Mental Health Conditions

Compulsive water drinking, known as psychogenic polydipsia, is linked with some mental illnesses such as schizophrenia and psychosis. People with these conditions tend to drink too much water, causing a hazardous electrolyte imbalance.

4. Drug Abuse

Drugs such as MDMA (ecstasy) raise the body temperature and make people thirsty, and at times, some people tend to drink excess water at events like music festivals. MDMA also leads to urine retention, thus exacerbating the dangers of water intoxication.

How Much Water Is Too Much?

The exact amount of water that causes intoxication varies from one person to another. However, drinking more than 1 liter of water per hour for several hours raises the risk. For healthy individuals, the risk of overhydration is low unless taking part in extreme physical activity or ignoring thirst cues.

Certain medical conditions, such as kidney or liver disorders, can impair the body's ability to process fluids, and even moderate water intake may be harmful. Similarly, certain medications, such as diuretics and antipsychotics, can affect the perception of thirst or fluid regulation.

How Much Water Is Enough?

The widely touted recommendation of eight 8-ounce glasses of water per day has little basis in fact. According to the National Academy of Medicine, a daily total fluid intake is about 15 cups (3.7 liters) for males and 11 cups (2.7 liters) for females, from beverage sources and from food. Usually, about 20 percent of daily hydration comes from foods such as fruits and vegetables.

A better rule of thumb is to listen to your body and drink water based on thirst. Use the color of your urine as an indicator:

• Light yellow urine indicates proper hydration.
• Dark yellow urine may indicate dehydration.

Older adults, whose thirst mechanisms may decline with age, should be proactive about maintaining hydration, especially during illness or hot weather.

Water Intoxication vs. Dehydration

The symptoms of water intoxication—such as headaches, fatigue, and muscle weakness—are similar to those of dehydration. If you are unsure which condition you are experiencing, seek medical attention immediately rather than self-treating with more water.

Preventing Water Intoxication

To avoid the dangers of overhydration:

• Drink water gradually throughout the day rather than consuming large amounts at once.
• Replace lost electrolytes post high-intensity exercise or heavy sweating.
• Consider using sports drinks or salty snacks to help replenish sodium.
• Keep track of fluid consumption during long-duration activities, and do not consume more water than the body is losing in terms of electrolytes.
• If on medications or have specific medical conditions, check with your doctor regarding the safety of drinking water.

For signs of severe water intoxication-including confusion, drowsiness, seizures, and loss of consciousness-customer is advised to seek medical assistance immediately. In the meanwhile, a salty snack would help to temporarily correct low sodium levels.

Hydration is important to health, but overhydration can be a serious risk; the secret is in finding a balance. Drink enough water to satisfy your body, but not so much that it overwhelms your system. Remember, water is life, but moderation keeps it that way.

Hyponatremia (low sodium level in the blood). National Kidney Foundation. 2023.

Water Toxicity. NIH. 2023

Exercise-Associated Hyponatremia: 2017 Update. Front Med (Lausanne). 2017

Update: Exertional Hyponatremia Among Active Component Members of the U.S. Armed Forces, 2007–2022

The current treatment course for high cholesterol is taking a daily tablet or regular injections over a long period. But instead, could a single treatment change the way high cholesterol is treated?

This possibility is being explored after a small first-in-human trial conducted by Cleveland Clinic found that one infusion of an experimental CRISPR gene-editing therapy lowered LDL, also called bad cholesterol, by about half and that the effect was still present a year later.

The treatment, called CTX310, is still experimental. The study involved just 15 people, so the findings are premature, not evidence that CRISPR can replace statins or other cholesterol medications.

About The Study

The Phase 1 trial included people with lipid disorders who had not responded adequately to existing medications.

Participants received a single infusion of CTX310, at different doses, and researchers followed them for 12 months.

At the highest dose, LDL cholesterol was reduced by 52.5% after one year, while triglycerides fell by 47.8%. The reductions seen earlier in the trial therefore persisted for at least 12 months.

Additionally, no serious adverse side effects related to the treatment were reported during the one-year follow-up. However, the researchers plan to continue monitoring participants for 15 years, as recommended for gene-editing therapies.

Also read: Inflammation May Be Quietly Changing Your Heart: Study Finds 43% Higher Risk Of Heart Attack & Stroke

How Does The CRISPR Treatment Work?

CTX310 operates differently compared to conventional cholesterol medicines. The treatment uses CRISPR-Cas9 gene editing to target ANGPTL3, a gene involved in regulating fats circulating in the blood.

The therapy delivers the gene-editing machinery to the liver, where it switches off ANGPTL3. Lower activity of this gene can reduce levels of LDL cholesterol and triglycerides.

The idea is that instead of using daily medicines to keep cholesterol in check, doctors could make a long-lasting genetic change.

Also read: Preeclampsia May End With Pregnancy. Your Heart Risk May Not

What Does It Mean For Statins?

Statins remain a reliable treatment approach for lowering LDL cholesterol and reducing cardiovascular risk. CTX310 has only been tested in a very small Phase 1 trial. Also, the study was primarily designed to examine the safety and explore whether the gene-editing treatment could produce a meaningful effect.

The fact that LDL remained lower after one year is promising and encouraging, but researchers still need to determine whether the treatment can safely maintain its effects over many years and, crucially, whether it reduces heart attacks, strokes and other cardiovascular events.

There is also a fundamental difference between cholesterol tablets and permanently altering a person’s DNA.

Promising Cholesterol Treatment Approach

High cholesterol is often a long-term condition. Depending on their risk, patients may need cholesterol-lowering treatment for many years.

If CRISPR becomes a reality, people may no longer have to stick to a chronic treatment strategy for managing cholesterol.

"Building upon the initial data presented in November 2025, the durability of the lipid-lowering effect was impressive," said Cleveland Clinic cardiologist Luke Laffin, M.D., first author of the study. "It is encouraging that there were no serious safety events related to CTX310 in the trial and in the year following treatment. We look forward to continuing to investigate this therapy in a larger number of patients."

At 22, the young woman had little reason to think she would soon be facing a major cardiac surgery. Newly married and otherwise healthy, she suddenly lost movement in her right arm and leg. Her family was devastated and struggled to understand how a young, healthy woman could have suffered a stroke.

Investigations revealed an unusual cause: a tumour in her heart, with a small piece believed to have broken away and travelled into the blood vessels supplying her brain. She was advised to undergo immediate open-heart surgery to remove the tumour.

But the prospect of open-heart surgery frightened her. Despite repeated counselling, she refused the procedure. Two months later, she suffered a second stroke. This time, she lost much of her ability to speak and eat, while her heart function had also fallen to 35%. Once again, open-heart surgery was advised. Once again, she refused.

Her Condition Worsened As Treatment Was Delayed

Over the next three months, her condition continued to deteriorate. She weighed only 35 kg, was weak and withdrawn, and required feeding through a Ryle's tube. Her husband continued looking for another option.

A neighbour eventually suggested that the family consult a doctor in Kolkata who performed robotic heart surgery. The family approached Dr Soumya Guha, Cardiothoracic and Vascular Surgeon, BM Birla Heart Hospital, initially through an online consultation, as the young woman was unwilling to visit a hospital.

This was an extremely high-risk case. She had already suffered two strokes, her heart function had come down to 35%, she was severely underweight at 35 kg and was physically very weak. The tumour was also large. Given her condition and the complexity of the surgery, I was initially reluctant to take up the case for robotic heart surgery. But the family was desperate, and we felt that if we could first improve her physical condition and prepare her psychologically, we could give her a chance. She needed to be built up before we could think of taking her safely through such a major procedure.

The team therefore spent time preparing her for surgery, working to improve her nutritional and physical condition while counselling her repeatedly to help her overcome her fear of surgery. Once she was considered ready, she was brought to Kolkata.

Also read: From 365 Shots To 52: How Could Lilly’s Newly-Approved Weekly Insulin Injection Change Diabetes Care

Two Tumours Found During Robotic Heart Surgery

The surgery presented another unexpected finding. What had been thought to be a single cardiac tumour turned out to be two tumours in the heart. Both were removed using robotic heart surgery.

Given her small body size, weakness and small blood vessels, the procedure required additional precautions during cardiopulmonary bypass. The team used artificial conduits to establish bypass and employed NIRS monitoring along with multiple filtration modes to support her during the procedure.

Rehabilitation Helps Her Regain Movement, Speech And Swallowing

Her recovery was also a major part of the treatment. Following surgery, she underwent extensive physical rehabilitation along with speech and swallowing therapy. Nursing, intensive care, physiotherapy, dietary support and ward care were all part of the recovery process, with the hospital administration also providing financial assistance to the family.

Today, the young woman is able to stand and walk on her own. She has begun speaking a few words and has progressed from Ryle's tube feeding to eating small amounts of mashed food.

For her family, the change has been remarkable: from watching a young woman suffer two strokes and gradually lose her ability to speak and eat, to seeing her prepare to return home on her own feet.

The surgery was only one part of this patient's journey. Given how weak she was, getting her through the operation safely was important, but helping her regain movement, speech and swallowing afterwards was equally important. This required the efforts of the surgical and anaesthesia teams, perfusionists, nursing staff, ICU and ward teams, physiotherapists, speech and swallowing rehabilitation and the dietician. The support from the hospital administration also made a difference to the family. Every one of these teams had a role to play in getting her to where she is today.

While dementia is generally associated with older age, its onset can begin much earlier, including in middle age. A new study led by an international team of researchers found that muscle loss as people age may be an important warning sign for dementia risk.

The study, published in the International Journal of Food Sciences and Nutrition, also found a surprising difference in how obesity was linked to dementia depending on a person’s age.

What Did The Study Find?

Researchers analyzed more than 80 studies examining the links between body weight, body fat, muscle health and dementia.

They found that people with sarcopenia — the loss of muscle mass and strength — had a 42 per cent higher risk of dementia.

People with obesity in middle age, or before 65, had a nine per cent higher risk of dementia. In contrast, obesity in people aged 65 and over was linked to a 17 per cent lower risk.

The findings showed that body weight alone did not tell the full story when it came to dementia risk.

“It’s not just about how much you weigh – maintaining muscle strength and function also appears to be important as we age,” said lead researcher Dr Uraiporn Booranasuksakul from Burapha University, Thailand.

“Our findings suggest losing muscle could be an important warning sign for dementia risk.”

Why Muscle Health Matters

Sarcopenia is a condition where people lose a greater amount of muscle mass, strength and physical function, often as they get older.

Dr Booranasuksakul said the findings highlighted the importance of looking after muscle health throughout life.

“Maintaining muscle is an important part of healthy ageing, and regular physical activity and good nutrition can help support muscle strength and function,” she said.

Obesity And Dementia Risk Change With Age

Corresponding author Professor Mario Siervo from Curtin University’s School of Population Health said the findings also challenged the idea that dementia risk could be understood simply by looking at a person’s weight.

“We found that obesity in middle age was linked to a higher risk of dementia, but this relationship changed in later life,” Professor Siervo said.

“This does not mean people should gain weight as they get older. Rather, it shows us that the relationship between body weight, ageing and dementia is complex.”

What About Sarcopenic Obesity?

The researchers also looked at sarcopenic obesity, where a person has both low muscle mass or function and excess body fat.

Only four studies met the criteria for this part of the analysis, and researchers found no statistically significant link between sarcopenic obesity and dementia.

Professor Siervo said more research was needed to understand whether the combination of muscle loss and excess body fat affected dementia risk.

“There is still a lot we don’t know about how changes in muscle and body fat interact over time,” Professor Siervo said.

“More long-term research is needed to understand whether having both low muscle mass and excess body fat increases dementia risk.”

A Lifelong Approach To Healthy Ageing

The researchers said the findings reinforced the importance of taking a lifelong approach to maintaining healthy body composition, including preventing unhealthy weight gain during middle age and maintaining muscle strength and function as people get older.