When was the last time you measured your waistline? If you assume that BMI is the only number to focus on when it comes to your health, think twice. New research has revealed a shocking revelation—your waist circumference might be a far better predictor of men's cancer risk than BMI.

The study finds that for each 4-inch increase in waist size, a man's risk of cancer increases by a staggering 25%. Meanwhile, BMI, commonly regarded as the gold standard for assessing obesity, raises cancer risk by only 19% for the same weight gain. So, if you've been dismissing that pesky belly fat, it's time to take notice.

But why is your waistline so important? The reason is visceral fat—the hidden, deep fat that accumulates around your organs. Unlike other body fat, visceral fat is a stealthy troublemaker, causing inflammation, insulin resistance, and abnormal blood fat levels—all of which combine to create a cancer-perfect storm.

Obesity has been associated with an increased risk of numerous health conditions, including cancer, for decades. The research, though, indicates that a specific measure of the body—waist circumference—may be an even more reliable forecaster of cancer risk in men than the more frequently employed Body Mass Index (BMI). This finding emphasizes the need to pay particular attention to the distribution of fat and not merely to the weight of the body.

BMI has been the go-to measure for years for gauging health risks related to obesity. New research, though, that appears in The Journal of the National Cancer Institute indicates that waist measurement is a better predictor of cancer risk in men. According to the research, four more inches (10 cm) around the waist will add 25% to a man's cancer risk. Conversely, a 3.7 kg/m² rise in BMI (from a BMI of 24 to 27.7) increased cancer risk by only 19%.

Why is waist circumference a better predictor, then? Unlike BMI, which measures weight relative to height, waist circumference actually measures abdominal fat—specifically, visceral fat. This type of fat encircles internal organs and is also linked to higher levels of inflammation, insulin resistance, and abnormal blood lipids, all of which are factors in cancer growth. BMI, however, does not measure fat distribution, so two individuals with the same BMI can have very different levels of health risk depending on where fat is deposited on their bodies.

Why Men Are at Higher Risk?

Interestingly, the research identified a significant difference between men and women when it came to waist circumference and cancer risk. Although waist circumference and BMI were linked with obesity-related cancers in women, the relationship was weaker than for men. An increase of 12 cm (4.7 inches) in waist size or a 4.3 rise in BMI (from 24 to 28.3) raised the cancer risk in women by just 13%—a much lower percentage than for men.

Experts credit this difference to the way that fat is stored in the body. Men are more likely to carry fat around the abdomen, especially as visceral fat, which is more metabolically active and associated with cancer-producing biological alterations. Women, by contrast, store fat in peripheral sites such as the hips and thighs, where it is less likely to drive systemic inflammation and metabolic disturbances.

A possible reason is that men tend to depot fat more in the visceral regions, whereas women tend to carry more subcutaneous and peripheral fat," wrote the researchers. "This may render waist circumference a more robust risk factor for cancer in men and account for why waist circumference provides additional risk information beyond BMI in men but not women."

Cancer Types Most Linked to Abdominal Fat

The research used the International Agency for Research on Cancer (IARC) data to define obesity-related cancers. These cancers are esophageal (adenocarcinoma), gastric (cardia), colorectal, rectal, liver, gallbladder, pancreatic, renal, and thyroid cancers, and multiple myeloma and meningioma. In men, abdominal obesity is especially significant in raising the risk of these cancers through high levels of insulin and markers of inflammation.

For women, the research proposes that both waist circumference and hip circumference may give a more accurate estimate of visceral fat and cancer risk. "Adding hip circumference to risk models could strengthen the link between waist circumference and cancer, especially in women," researchers observed.

What This Means for Men's Health and Cancer Prevention?

With these results, doctors advise men to be more mindful of their waistline than only their BMI. Waist size is an easy method to gauge health risk, and its maintenance through lifestyle changes might be the key to cancer prevention.

How To Reduce Cancer Risk In Men?

Track Your Waist Size: Regularly measure your waist circumference and try to keep it in a healthy range (below 40 inches for men, according to medical advice).

Eat a Balanced Diet: A diet containing high fiber, lean protein, and healthy fats can assist in limiting visceral fat gain.

Exercise Consistently: Regular exercise with a combination of aerobic and strength training will help maintain a healthy waistline.

Control Stress and Sleep: Persistent stress and inadequate sleep tend to cause weight gain, especially in the midsection of the body.

Regular Health Screenings: Early identification of cancer risk factors through regular screening can greatly enhance long-term health status.

The liver and heart are two of the most vital organs of the body, and although they perform very different functions, they are closely connected. When the liver is not functioning properly, it can place significant stress on the heart and circulatory system of the body.

Liver disease not only affects the digestion process, metabolism, and detoxification but can also trigger serious cardiovascular changes that may go unnoticed in the early stages. Understanding this particular connection is significant for timely diagnosis and better overall care.

The Liver-Heart Connection

The liver helps to regulate the flow of blood, fluid balance, cholesterol metabolism, and inflammation as well. When liver disease develops—whether due to fatty liver, hepatitis, cirrhosis, or alcohol-related damage—all these processes become disturbed.

As a result of the same, the heart may have to work harder to maintain circulation, while blood vessels may also undergo certain changes that impact blood pressure and delivery of oxygen as well.

Changes In Blood Circulation

In well-advanced liver disease, especially cirrhosis, the flow of blood through the liver becomes restricted. This can also increase pressure in the portal vein, a condition known as portal hypertension. At the same point in time, blood vessels in the rest of the body may also widen, causing a drop in effective blood pressure.

To compensate, the heart pumps faster and harder. With the passage of time, this constant strain can weaken cardiac function and even lead to a condition sometimes referred to as cirrhotic cardiomyopathy, where the heart does not respond normally under stress.

Fluid Retention And Heart Stress

Liver disease often causes the body to retain both salt and water. This can also lead to swelling in the legs, abdomen, and surrounding tissues as well. Extra fluid in the body increases the workload on the heart, making it more difficult for it to pump blood in an efficient way. In severe cases, this may also contribute to shortness of breath, fatigue, and worsening cardiovascular strain.

Inflammation And Metabolic Impact

Some of the conditions, such as non-alcoholic fatty liver disease, are also linked with diabetes, obesity, high levels of cholesterol, and high blood pressure – all of which are the major risk factors for heart disease. Chronic inflammation, well-associated with liver damage, may further increase the risk of atherosclerosis and other cardiac complications.

GLP-1 receptor agonist drugs such as Ozempic and Wegovy have shown significant benefits for people with diabetes and obesity. However, not everyone experiences the same results.

Now, a study suggests that this variation may be due to genetic resistance, which means that some people are biologically less responsive to these medications, making these drugs less effective.

The new study by scientists at Stanford University in the US showed that about 10 per cent of the general population carry genetic variants that lead to what the researchers called “GLP-1 resistance”.

The GLP-1- receptor agonist drugs typically work by mimicking the hormone GLP-1 (glucagon-like peptide-1), which naturally helps regulate blood sugar by stimulating insulin release. The process slows the emptying of the stomach and reduces appetite.

However, in individuals with certain genetic variants, the team found that higher levels of GLP-1 did not regulate blood sugar better.

The researchers noted that the findings, published in the journal Genome Medicine, may be key to developing new therapies for people with GLP-1 resistance.

“There are a whole class of medications that are insulin sensitizers, so perhaps we can develop medications that will allow people to be sensitized to GLP-1s or find formulations of GLP-1, like the longer-acting versions, that avoid the GLP-1 resistance,” said Anna Gloyn, professor of pediatrics and of genetics at Stanford Medicine.

The Gene Linked to GLP-1 Resistance

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To zero in on the gene resistant to GLP-1 drugs, the team conducted experiments in humans. They traced this resistance to a PAM variant known as p.S539W.

PAM (peptidyl-glycine alpha-amidating monooxygenase) is an enzyme that is uniquely capable of activating many hormones in the body, including GLP-1.

While the researchers suspected that people with the PAM variant would have lower levels of GLP-1 in their blood, it actually increased levels of GLP-1. Although the exact mechanism is still unclear, experiments in both humans and mice confirmed signs of reduced response to GLP-1.

Analyzing diabetes drug trial data, they found that individuals with these variants were less able to lower their blood sugar levels even after six months of treatment. This suggests that despite having more circulating GLP-1, their bodies are less responsive to it.

“When I treat patients in the diabetes clinic, I see a huge variation in response to these GLP-1-based medications and it is difficult to predict this response clinically,” said Mahesh Umapathysivam, an endocrinologist and clinical researcher at Adelaide University in Australia.

“This is the first step in being able to use someone’s genetic make-up to help us improve that decision-making process,” he added.

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Importantly, participants with the PAM variants did not respond differently to other common diabetes treatments, including sulfonylureas, metformin, and DPP-4i.

The finding may help develop precision medicine, the researchers said. Knowing ahead of time who is likely to respond would help patients get on the right drugs faster, Gloyn said.

Reasons Why Ozempic May Not Help All People Lose Weight

Ozempic is primarily indicated for type 2 diabetes management. But some doctors may prescribe it for weight loss in appropriate patients without diabetes.

Previous research has shown that medical conditions such as sleep apnea, along with certain common medications, such as antidepressants, steroids, and contraceptives, can hamper the process of shedding extra pounds.

Another major reason that can hamper weight loss is the side-effects of these drugs that can prompt a person to halt their prescription mid-way.

Once widely known as non-alcoholic fatty liver disease (NAFLD), the common and dangerous fatty liver condition was rephrased as Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD) due to its strong link to metabolic health issues like obesity and diabetes.

MASLD now includes patients with fatty liver disease linked to metabolic risk factors such as obesity, diabetes, and hypertension.

MASLD: So What Prompted The Change?

Globally, it was observed that all patients who have non-alcoholic fatty liver disease also have some associated form of metabolic dysfunction. The patients reported having either obesity, diabetes, metabolic syndrome, hypertension, or cholesterol problems.

And all these problems eventually lead to significant comorbidities later, like some people developed heart disease, while others developed complications of diabetes.

In view of these, a global consensus process in 2023 involving hundreds of experts from different countries adopted MASLD as it better reflected these underlying causes of the condition.

What Does MASLD Mean?

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MASLD is an umbrella term for liver conditions that develop in the presence of 1 or more cardiometabolic risk factors—including high blood sugar, elevated body mass index (BMI), and hypertension—but in the absence of other causes of liver fat accumulation.

The condition can be defined by excess liver fat accumulation (more than 5 per cent of liver weight) in the presence of metabolic dysfunction, independent of alcohol intake.

It encompasses a spectrum from simple steatosis to steatohepatitis, fibrosis, cirrhosis, and hepatocellular carcinoma.

“Initially, it was thought that having fatty liver disease without alcohol was a benign condition, but now it is recognized that, since it is associated with lots of metabolic comorbidities, it's no longer benign,” Dr. Ashish Kumar, Professor of gastroenterology and hepatology at Sir Ganga Ram Hospital in New Delhi, told HealthandMe.

He stated that whenever a diagnosis of fatty liver is present, "we should actually include other comorbidities, like obesity, dyslipidemia, which means cholesterol problem, diabetes, sugar problem, pre-diabetes, and hypertension. At least 50–70–80 percent of these patients will have one or more of these comorbidities".

Why Alcohol Is Not The Only Culprit For Fatty Liver

Although alcohol has remained the number one risk for liver disease, MASLD seems to be rising globally, including among people who do not drink. Why?

The reasons include:

a sedentary lifestyle,

increased consumption of fast and processed food,

lack of exercise,

lack of sleep,

stressful life.

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The experts noted that food, especially the increasingly accessible junk food or processed food, is a major culprit.

“So even if the person is not drinking alcohol, people are developing addiction to processed food, and this is causing an epidemic level of obesity and diabetes. Consequently, MASLD is also increasing, and now it is becoming the number one cause of liver disease,” Dr Kumar said.

How To Prevent MASLD?

According to Dr. Sanjay Goja, Director, Liver Transplant & HPB Surgery, Narayana Hospital, Gurugram, prevention must focus on following a healthy lifestyle like maintaining a healthy BMI, engaging in regular physical activity, and eating a balanced diet.

Controlling diabetes, cholesterol, and blood pressure is also important to prevent the risk of MASLD.

Dr Siddharth Badola, Manipal Hospital, Ghaziabad, suggested sustainable lifestyle changes such as:

Maintaining an adequate body weight: Even slight weight loss (5–10 percent) has been shown to significantly reduce liver fat and inflammation.

Follow a balanced and nutrient-rich diet: People should focus on consuming whole grains, fresh fruits and vegetables, lean proteins, and healthy fats, while limiting refined carbohydrates and processed foods.

Avoid foods with added sugar: Excess consumption of fructose, commonly found in packaged foods and sugary beverages, is a key contributor to fat accumulation in the liver.

Engage in regular physical activity: At least 150 minutes of moderate-intensity exercise per week is recommended to improve insulin sensitivity and liver health.

Manage associated metabolic conditions: Effective control of diabetes, hypertension, and dyslipidemia is essential in reducing the risk of MASLD progression.

Ensure adequate sleep and stress management: Poor sleep quality and chronic stress can negatively impact metabolic balance and liver function.

Keep your body hydrated with ample water intake and follow structured meal timings.