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.

Abdominal, also known as central obesity, poses a greater health risk than overall obesity, especially in Indians, said Dr. Jitendra Singh, the Union Minister of State (Independent Charge) for Science and Technology.

Speaking at the release of a cardiology textbook titled “Advances in Obesity and Lipid Management in CVD,” by eminent cardiologist Dr. H.K. Chopra, Singh said that even lean and thin-looking individuals often carry significant visceral fat.

Amid a rapidly growing number of chronic conditions, such as diabetes, hypertension, and cardiovascular diseases, the Minister shared that abdominal obesity is the driving factor.

"There is sufficient evidence to show that Central obesity, even in apparently non-obese individuals, predisposes to a wide spectrum of metabolic disorders including diabetes, hypertension, cardiovascular diseases, fatty liver, dyslipidemia, etc.,” Singh, who is also a diabetologist, said.

“In other words, Abdominal or Central obesity is a greater risk factor compared to overall obesity, particularly in the Indian context where even lean and thin-looking individuals often carry significant visceral fat,” he added.

The Minister reiterated the importance of balanced health practices and emphasized the need for following a “sustained lifestyle discipline, adequate sleep, and scientifically guided preventive care”.

What Is Abdominal Obesity?

Abdominal obesity refers to an excessive accumulation of visceral fat around the stomach and internal organs, such as the liver, heart, kidneys, and the mesentery of the intestine.

Unlike subcutaneous fat, which lies beneath the skin, visceral fat is metabolically active and poses greater health risks.

It can increase your risk of heart disease, type 2 diabetes, high blood pressure, stroke, and some types of cancer.

It is because visceral fat produces hormones and other substances that can cause inflammation and insulin resistance, which can lead to these health problems.

A 2024 study from the Washington University School of Medicine in St. Louis, Missouri, showed that a higher level of visceral fat was related to increased amyloid -- accounting for 77 per cent of the effect of high BMI on amyloid accumulation.

Who Is More At Risk Of Abdominal Obesity

The Minister said that while overall obesity is rising among both men and women, the prevalence of abdominal obesity remains disproportionately high and acts as an independent determinant of cardiometabolic risk. The presence of visceral fat around the abdomen, even without generalized obesity, has significant clinical implications and requires early detection and targeted intervention.

A waist circumference of more than 40 inches for men or 35 inches for women may indicate a higher risk of visceral fat accumulation.

While people with a larger waistline or pot belly are at known risk of having visceral fat, thin people too can have fat accumulation in their internal organs.

According to health experts, even people with a healthy weight can have high levels of visceral fat.

This is because visceral fat is not always visible on the outside of the body, and it can accumulate even if a person appears to be thin or in good shape.

Also read: Checking BMI For Body Weight? It Can Wrongly Mark You As Overweight or Obese, Says Study

Strategies for Successful Weight Management

To tackle obesity, one needs a holistic strategy beyond mere weight reduction. Healthy and sustainable weight reduction and improvement of health are more about body composition than mere weight. Major strategies are:

A balanced diet composed of whole foods, lean meats, and good fats in addition to physical exercise encourages sustainable weight reduction.

Resistance training helps in preserving muscle mass along with fat reduction, which improves metabolic well-being.

Prescription weight-loss medication can help manage obesity alongside lifestyle changes.

For people with severe obesity, surgeries such as gastric bypass or sleeve gastrectomy may provide significant long-term advantages.

Prioritize your metabolic health through healthy eating, portion control, and mindful eating for long-term success.

Bipolar disorder is commonly misunderstood as mere mood fluctuations; however, it is a serious and complex mental health condition.

The condition presents extreme mood fluctuations — hyperactivity and impulsiveness — and depressive lows — lethargy and hopelessness.

Bipolar disorder affects over 40 million people worldwide. Yet diagnosis remains challenging, as many people remain undiagnosed or misdiagnosed for long periods. Some are treated for other mental health conditions, such as depression or ADHD, causing delays in effective treatment.

Speaking to HealthandMe, Dr. Kriti Anand, Consultant, Psychiatrist, Paras Health, Panchkula, said: “Early identification of bipolar disorder is essential for the improvement of the condition of patients. It aids in recognizing patterns early on, which helps to stabilize moods and minimize the occurrence of severe and recurring episodes”.

“With the correct identification of the condition and intervention, people can effectively maintain relationships and stay productive,” Dr. Anand added.

Importance Of Early Detection

Recognizing bipolar disorder early is critical for better outcomes. People who do not get a timely diagnosis are likely to experience more frequent and intense mood episodes, which can become harder to manage over time.

Early evaluation allows healthcare professionals to identify patterns and introduce treatments that help stabilize mood and reduce the severity of symptoms.

Notably, the experts stated that treating bipolar disorder simply as depression means that antidepressants are prescribed, which could cause a manic episode to occur.

With early diagnosis, the chances of harmful behaviors are reduced and prevent suicidal tendencies that are often a result of untreated cases of bipolar disorder.

It also enhances the quality of life, enabling patients to maintain healthy relationships, work productively, and attend to their daily responsibilities.

Early symptoms includes

• Extreme irritability, intense happiness, or sudden, uncharacteristic anger
• A sudden, unexplainable rise or decline in energy levels
• Reduced need for sleep without feeling tired or difficulty falling asleep
• Engaging in risky activities
• Racing thoughts or difficulty concentrating

It’s important to conduct a thorough evaluation to ensure an accurate diagnosis. This involves looking at the patient’s medical history and mental health history.

The symptoms are also evaluated using a structured approach. In some cases, a physical examination may also be conducted. As bipolar disorder involves long-term patterns, it’s possible to observe the patient over a long period of time.

Once diagnosed, early intervention can begin. Treatment for bipolar disorder may involve

• drugs to control mood,
• therapy to improve coping abilities,
• lifestyle habits such as sleeping and exercising regularly.

“A thorough and timely evaluation is essential for accurately diagnosing bipolar mood disorder, especially in cases where symptoms overlap with other conditions. Early intervention by mental health experts, in the form of appropriate treatment, therapy, and lifestyle adjustments, can significantly reduce complications," Surg Commodore (Dr.) Sunil Goyal (Retd), Senior Consultant - Psychiatry, Sarvodaya Hospital, Faridabad, told HealthandMe.

"This will help individuals achieve long-term stability of mood along with improved quality of life in all socio-occupational spheres," he added.

Left untreated, bipolar disorder can lead to serious problems that affect every area of your life, including:

• Problems related to drug and alcohol misuse
• Suicide or suicide attempts
• Legal or financial problems
• Trouble getting along with others
• Poor work or school performance

The experts noted that early detection of bipolar disorder is not just about diagnosis; it is about improving lives.

Identifying the condition early helps in reducing the chance of developing serious complications, decreasing the possibility of being misdiagnosed, and also allows for treatment to be delivered in a timely and appropriate manner.

American actress Olivia Munn has opened up about her journey with deadly breast cancer, which came with no typical symptoms.

In her latest interview on CBS News Sunday Morning, the 45-year-old actress recalled being “faced with the possibility of death” in April 2023, when she was diagnosed with Stage 1 breast cancer.

Importantly, the actress had no symptoms, and even tests like a mammogram and ultrasound gave her a clean chit.

"No symptoms. And I had a clear mammogram and a clear ultrasound," Olivia was quoted as saying.

However, the condition was detected after taking the Lifetime Risk Assessment test -- a free online Q&A that gave her a high score estimating the risk of developing breast cancer in a lifetime. The test marked any score above 20 percent as a high risk. Munn's risk score was 37.3 percent.

The online test — Tyrer-Cuzick Risk Model — is publicly accessible and widely recommended by experts, and it calculates a woman’s five-year and lifetime risk of developing breast cancer using a combination of factors like age, family history, genetics, reproductive history, and more.

Post the assessment, she took "an MRI, which led to an ultrasound, which then led to a biopsy," she explained.

The biopsy showed that she had what she described as "an aggressive, fast-moving cancer" in both of her breasts.

Once she learned the diagnosis, she fought back with everything she had. She got a double mastectomy, an ovariectomy, and a partial hysterectomy. Now her risk score is zero.

Instead of recovering quietly, Olivia made it her mission to raise awareness about the condition — posting about her cancer on social media and telling the world about the risk assessment test.

In the years since Munn started sharing her story, the number of women taking the test has increased by 4,000 percent, the report said.

"Knowing that it's really changed so many people's lives. It's been the most amazing thing. There's no way I could have ever predicted it," she said.

In 2025, Olivia’s mother, Kim, was also diagnosed with breast cancer after taking the same risk assessment test.

In an Instagram post, Munn said her mother was diagnosed with Stage 1 HER2-positive breast cancer, a fast-growing but often treatable type of the disease. Her diagnosis came after Munn encouraged her mom and sister to take a free online breast cancer risk assessment.

Also read: Amanda Peet Opens Up About Breast Cancer Battle, Shares Toughest Moment

What Is A Lifetime Risk Assessment Test?

The MagView Tyrer-Cuzick Risk Assessment Calculator is an online tool that helps one calculate their lifetime risk of developing breast cancer.

The tool urges people to reach out to their healthcare professional in case they have any questions about their risk of developing breast cancer and what the best options are for breast cancer screenings or genetic counseling they may have.

Olivia stressed that any woman over 30 should take the test, and if their risk is above 20 percent, they should ask their doctor for a breast MRI.

Also read: Christy Carlson Romano’s Cancer Test Result Shows Why Regular Screening Is Important

Who Should Get Breast Cancer Screening Done?

According to the American Cancer Society, you are considered to be at average risk if you do not have a personal history of breast cancer, a strong family history of it, or a known genetic mutation (like in the BRCA gene) that increases your risk.

This also applies if you have not had chest radiation before the age of 30. These are the breast cancer screening recommendations for women who are at average risk.

Ages 40-44: You have the choice to start getting a mammogram every year.

Ages 45-54: You should get a mammogram every year.

Ages 55 and older: You can switch to getting a mammogram every other year, or you can choose to continue getting one every year.

You should continue to get screened as long as you are in good health and are expected to live at least 10 more years.