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.

For a patient with advanced heart failure, there comes a point when medicines, devices and repeated hospitalisations can no longer control the disease. For some, a heart transplant may offer the only realistic path to long-term survival. Yet in India, the challenge often begins much earlier than the waiting list: many patients who could potentially benefit from transplantation never reach an advanced heart-failure or transplant centre for evaluation.

The scale of the problem is enormous. A recent study found that 83,000 heart transplantations were required annually in India in 2021, although only a very small proportion of that need was met. In comparison, according to the National Organ and Tissue Transplant Organisation (NOTTO), 221 heart transplants were performed in 2023.

Why Patients With Advanced Heart Failure Miss Out

The first issue is delayed referral. Patients with advanced heart failure may continue to be treated repeatedly for breathlessness, fluid retention or hospital admissions without being assessed early for advanced therapies.

A transplant evaluation is not a last-minute decision. It requires time to assess the patient's medical condition, other organs, infection risk, nutrition, psychosocial circumstances and ability to undergo lifelong follow-up.

The second challenge is the limited availability of donor hearts. Heart transplantation depends almost entirely on deceased organ donation. India has made substantial progress in transplantation overall, but the national deceased organ donation rate remains less than one donor per million population.

How Geography And Cost Affect Access To Transplants

Geography and affordability also matter. Advanced heart-failure programmes and transplant centres are concentrated in selected regions, meaning that patients from smaller cities and rural areas may face substantial travel, financial and logistical barriers.

The cost of evaluation, repeated hospitalisations, mechanical circulatory support and post-transplant medicines can further influence whether a patient can realistically pursue transplantation.

Also read: “You’ve Got A Pig’s Heart!” Genetically Modified Pigs with Human-like Organs Transforming Organ Donation; Details Inside

When Should Patients Be Referred To A Transplant Centre?

We therefore need to change the way advanced heart failure is recognised. A patient with recurrent hospitalisations, persistent symptoms despite optimal therapy, progressive kidney or liver dysfunction, low blood pressure limiting medications, or dependence on intravenous therapies should trigger consideration of referral to an advanced heart-failure centre.

Early referral gives specialists more time to evaluate the patient, assess treatment options and determine whether transplantation or another advanced therapy is appropriate.

Heart Transplant Is Not The Only Advanced Treatment

Importantly, transplantation is not the only advanced therapy. Left ventricular assist devices (LVADs) can serve as a bridge to transplantation or, in selected patients, as long-term therapy.

These devices can help support the heart's pumping function in patients with advanced heart failure who meet the criteria for their use. The appropriate option depends on the patient's condition, overall health and treatment goals.

India has demonstrated that transplantation can grow rapidly when infrastructure, coordination and public awareness improve. The next step is to ensure that patients are identified early enough to be evaluated, and that a shortage of donor organs does not remain the only reason they never get the opportunity to reach the transplant list.

By Dr. Pravin Kulkarni, MBBS, MS (General Surgery), MCh (Cardiovascular and Thoracic Surgery), Fellowship in CTS, Director, Advanced Cardiac Surgery and Heart and Lung Transplant Program

According to the latest National Family Health Survey (NFHS-6), 30.7% of women aged 15-49 years in India are reported as overweight or obese, highlighting the growing importance of lifestyle factors in women’s reproductive and overall health. Along with nutrition and physical activity, sleep is another important factor for overall menstrual health and the ovulation cycle.

Ovulation is controlled by a complex interaction between the brain, pituitary gland and ovaries. This reproductive hormone system is closely connected to the body's circadian rhythm, which regulates the sleep-wake cycle and influences the timing of several hormonal processes. When sleep becomes consistently irregular or insufficient, these signals may become disrupted, potentially affecting the hormonal coordination required for normal ovulation.

How Sleep Disturbances May Affect Reproductive Hormones

Also read: Andrew Huberman’s Sleep Trick: Can Eye Movements Help You Fall Back Asleep?

One of the ways this may occur is through interference with the functioning of the hypothalamic-pituitary-adrenal (HPA) axis. The reproductive system relies on communication between the hypothalamus and pituitary gland to regulate the hormones involved in follicle development and egg release.

Melatonin is another hormone linked to sleep and circadian rhythm. It also has antioxidant properties in the ovaries. This is why the relationship between sleep and fertility may involve more than simply the number of hours a woman sleeps.

A 2025 study published in Chronobiology International found that a later chronotype, or a tendency to sleep and wake later, was associated with a higher risk of sporadic anovulation among women with regular menstrual cycles.

Each one-hour increase in later chronotype was associated with a 5% higher relative risk of anovulation (RR 1.05; 95% CI 1.00–1.11), while women in the third chronotype tertile had a 33% higher relative risk compared with those in the second tertile (RR 1.33; 95% CI 1.05–1.68).

Interestingly, sleep duration itself was not associated with anovulation, suggesting that sleep timing and circadian patterns may also matter.

Poor Sleep Quality May Also Matter During IVF

Sleep may also be relevant during fertility treatment. A 2025 prospective cohort study of 174 women undergoing IVF/ICSI reported that women with poor sleep quality had 22.89% fewer retrieved oocytes and 22.01% fewer matured oocytes after adjustment for relevant factors.

The study also reported associations between certain sleep patterns and other IVF outcomes. However, these findings are observational and do not establish that poor sleep directly causes poorer fertility outcomes.

Breast cancer is often thought of as a disease that affects older women. However, younger women can develop breast cancer too, and receiving a diagnosis in your 20s or 30s can come as a shock, particularly when there is no known family history or obvious risk factor.

While breast cancer is less common at a younger age, being young should not mean dismissing a breast change. Here is what young women should know.

Being young doesn't mean a breast lump isn't worth investigating

Most breast lumps are benign, but a doctor should evaluate any new or persistent breast change. This includes a lump in the breast or under the arm, a change in breast size or shape, dimpling or puckering of the skin, changes in the appearance or position of the nipple, or unusual nipple discharge, especially discharge that is bloody.

Breast changes can occur because of hormonal fluctuations and several non-cancerous conditions, particularly in younger women. However, it is important not to assume that a change is harmless simply because of age.

Know your individual risk

Age is one of several factors that influence breast cancer risk. Having a close relative, such as a mother or sister, with breast or ovarian cancer can increase risk, particularly when the cancer occurred at a younger age. Certain inherited genetic changes, including BRCA1 and BRCA2 mutations, can also increase the risk of breast and ovarian cancers.

Previous radiation exposure to the chest at a young age is another recognised risk factor.

This is why knowing your family history matters. If breast or ovarian cancer has affected several close relatives, discuss your family history with a doctor. Depending on the pattern of cancers in the family, genetic counselling or testing may be recommended. Genetic testing, however, is not necessary for everyone and should be guided by an individual's risk profile.

Also read: ‘Feels Like I’m A Few Days From Death’: Olympic Sprinter Beth Dobbin Says She Is Bedbound 22 Hours A Day

Don't wait for a lump to become painful

Breast cancer does not always cause pain, and early-stage disease may not produce noticeable symptoms. At the same time, breast pain or tenderness and lumps can occur with several benign conditions.

In India, particularly across warmer and more humid regions, breast discomfort can also be aggravated by wearing very tight, heavy padded or underwired bras for prolonged periods. Such bras may cause pressure, friction and discomfort and can contribute to breast pain or mastalgia in some women, especially when the fit is not appropriate.

It is important to clarify that there is no scientific evidence that wearing tight, padded or underwired bras causes breast cancer. However, an uncomfortable or poorly fitting bra can contribute to breast discomfort. Choosing a well-fitted, supportive bra and avoiding prolonged pressure or friction may help reduce symptoms.

The important thing is to pay attention to changes that are new, unusual or persistent rather than trying to diagnose them yourself. Young women should be familiar with how their breasts normally look and feel so they can recognise when something has changed.

Also read: Dr Rachna Shroff: Indian-American Cancer Researcher Who Turned Her Diagnosis Into Advocacy

Screening should be based on risk, not age

Most women in their 20s and 30s who are at average risk do not need routine mammography screening. However, women with a higher-than-average risk may need to begin screening earlier and may require additional tests, such as breast MRI or mammography, depending on their individual circumstances.

Screening recommendations should therefore be based on personal and family history rather than age alone. Women who are concerned about their risk should discuss an appropriate screening plan with their doctor.

What can young women do?

Know your family history and share any significant concerns with your doctor. Maintain a healthy lifestyle by eating a balanced diet, exercising regularly, avoiding smoking and limiting alcohol consumption.

Most importantly, do not dismiss a breast change simply because you are young. Breast awareness is about understanding what is normal for you and recognising when something is different.

A breast lump or other change does not automatically mean cancer, but getting it checked can provide clarity and ensure that any condition requiring treatment is identified at the appropriate time. For young women, awareness is not about living in fear—it is about being informed, attentive and proactive about their health.

By Dr. Tapti Sen, Sr. Consultant - Breast Surgery, RG Hospitals, Kolkata