For years, the bathroom scale has been one of the simplest ways to track weight.
But a growing body of scientific evidence is shifting attention to another measurement: your waist circumference.
The reason is simple. Where the body stores fat may matter almost as much as how much a person weighs.
Excess fat around the abdomen, often referred to as visceral fat, is increasingly associated with insulin resistance, type 2 diabetes (T2D) and cardiovascular disease (CVD). Waist circumference can also provide information that BMI does not capture.
In South Africa, this message comes as the burden of metabolic disease continues to grow.
An estimated 4.7 million South Africans are living with diabetes, with the vast majority having type 2 diabetes. Millions more remain undiagnosed or are at high risk of developing the disease.
The risk is further compounded by high obesity rates. Approximately 31% of men and 68% of women in South Africa are classified as obese.
Why Your Waist Matters
Not all body fat behaves in the same way.
Visceral fat sits around internal organs and is metabolically active. It produces stress hormones, inflammatory molecules and fatty acids that may contribute to chronic disease.
That makes waist circumference more than a measurement of clothing size.
It can serve as a simple screening tool for metabolic risk.
This is the thinking behind Waist Wise, a Pharma Dynamics initiative encouraging South Africans to measure their waist once a month as an easy way to keep track of their metabolic health.
A Simple Measurement Can Reveal More
Waist circumference can help identify people who may have an increased risk of metabolic syndrome.
Metabolic syndrome refers to a cluster of conditions that includes elevated blood sugar, high cholesterol, high blood pressure and excess abdominal fat. Together, these factors can significantly increase the risk of type 2 diabetes and cardiovascular disease.
According to the International Diabetes Federation (IDF), men with a waist measurement of 94 cm or more and women with a waist measurement of 80 cm or more may have an increased risk of metabolic health problems.
If your measurement is above these levels, the recommendation is to speak to a healthcare provider about your individual risk.
Importantly, BMI does not tell the whole story.
A person can have a “normal” BMI while still carrying excess abdominal fat and facing increased cardiometabolic risk.
“Many people are reassured when the number on the scale doesn’t change very much, but that’s not always the full story,” says Helena Westwood, Associate Director for Consumer Brands at Pharma Dynamics.
“Where fat is stored can be just as important as how much we weigh. Measuring your waist is a quick, inexpensive habit that can help people identify potential metabolic risk earlier.”
Westwood says waist circumference should be treated as another simple health check that people can perform at home alongside monitoring their weight.
Prevention Starts With Awareness
A changing waistline can provide an early reason to pay closer attention to metabolic health.
“Prevention starts with awareness. If people begin noticing their waistline increasing over time, it gives them the opportunity to make lifestyle changes before more serious health problems develop,” says Westwood.
Reducing waist circumference is also about more than appearance.
“People often think the goal is to lose weight, but the bigger goal is improving metabolic health,” she says. “Even modest reductions in abdominal fat can improve insulin sensitivity and reduce the risk of developing chronic diseases.”
Research shows that several lifestyle factors can contribute to reducing abdominal fat and improving metabolic health.
These include regular physical activity, a balanced eating pattern rich in vegetables, whole grains, legumes and lean protein, adequate sleep, stress management, limiting alcohol intake and avoiding smoking.
Anyone who notices a steady increase in their waist measurement should consider speaking to a healthcare provider. This is particularly important for people with a family history of diabetes, high blood pressure or cardiovascular disease.
“Early screening can identify elevated blood glucose and other risk factors before symptoms appear, giving people a valuable opportunity to intervene early,” Westwood adds.
Where Supplements Fit In
Lifestyle modification remains the cornerstone of preventing and managing metabolic disease.
However, under the guidance of a healthcare professional, some people may also consider evidence-based nutritional supplements as part of a broader management plan.
Emerging research has examined ingredients including inositol, barberry-derived extracts, including berberine-containing extracts, and banaba leaf extract for their potential role in supporting healthy glucose metabolism and insulin sensitivity.
While some studies have produced encouraging findings, these ingredients are intended to complement, rather than replace, a healthy diet, regular exercise and appropriate medical care.
The One-Minute Challenge
The Waist Wise campaign is encouraging South Africans to make waist measurement a monthly habit.
It takes about a minute.
Here is how to do it:
- Stand upright and breathe out normally.
- Place a tape measure around your abdomen midway between the bottom of your ribs and the top of your hip bones.
- Make sure the tape is snug without compressing the skin.
- Record your measurement each month and watch for upward trends.
- If your waist is increasing or exceeds 94 cm for men or 80 cm for women, discuss the result with your healthcare provider.
“A tape measure costs very little, takes less than a minute to use and can provide valuable insight into your metabolic health,” says Westwood.
“It’s one of the simplest habits people can adopt to help identify potential health risks before they become serious.”
The message behind Waist Wise is not about becoming obsessed with a number.
It is about paying attention.
Because while the bathroom scale can tell you how much you weigh, your waist measurement may reveal another part of the story — one that could help you recognise potential metabolic risk earlier.
