Here’s What Experts Want You to Know About Belly Fat and Eating Sugar


a woman holding a birthday cake: Getty / Carol Yepes© Getty / Carol Yepes
Getty / Carol Yepes

Losing belly fat can feel impossible for many women (thank you genetics and hormones!). And while you can’t spot reduce fat from your stomach specifically, you can lower your overall body fat percentage by changing up your diet. We asked registered dietitians, an exercise physiologist, and MDs and they all agree — limiting your sugar intake can help with fat loss, which will help you lose belly fat.

What Happens When You Eat Sugar?

When we eat, the pancreas produces insulin. Eating sugar (or any carbohydrate) will cause insulin levels to increase, explained weight-loss physician Linda Hodges, DO. Insulin’s job is to take the sugar from food and bring it into the brain and muscle cells that use it as fuel, explained Vera Tarman, MD, an addiction physician who works with people who struggle with food and sugar addiction.

Insulin helps keep your blood sugar in a certain range, and when you eat sugar, it requires more insulin to complete that task. “If one is constantly over-consuming sugar, insulin levels can eventually remain high all the time,” Dr. Hodges explained.

How Does Insulin Affect Weight?

Why are high levels of insulin bad for weight loss? Jason Fung, MD, a nephrologist (kidney specialist) who specialises in obesity told POPSUGAR that the issue with weight gain isn’t too many calories, it’s “too much insulin.” Eating sugar causes insulin levels to rise, which signals your body to store fat.

“Refined sugar overwhelms our natural hormonal treatment of sugar and the body (through insulin spikes) takes the excess sugar and parks it into the abdomen,” Dr. Tarman explained. That’s why insulin is known as the ‘fat-storing hormone,” she said.

Fat stored inside the abdomen beneath your abdominal muscles around your organs is known as visceral fat. This type of fat can not only lead to inflammation, Hodges said, but Dr. Tarman added that visceral fat “is the visual warning of illnesses such as diabetes and heart disease to come.” Eating too much sugar and gaining visceral fat can create what doctors call metabolic syndrome, which could not only lead to the diseases previously mentioned, but also high cholesterol, Alzheimer’s, and cancer, Dr. Tarman explained.

How Else Does Eating Sugar Cause Weight Gain?

Aside from raising insulin levels, another thing to be mindful of is that sugary foods and beverages, and refined carbs tend to be calorie-dense, yet very low in nutrients, explained Melissa Morris, an ACSM-certified exercise physiologist and nutrition and applied kinesiology professor at the University of Tampa. As an ISSN-certified sports nutritonist, Morris explained that since sugary foods don’t offer the protein, fibre, and healthy fats to make us feel satiated, it’s easy to over-consume them, increasing our daily calorie intake, which can lead to weight gain and belly fat.

High levels of insulin in the blood also block leptin signals (the “I’m full” hormone) to the brain, explained Susan Peirce Thompson, a psychology professor with a PhD in brain and cognitive science, in a previous interview. Your brain doesn’t see that you’re full, so when you eat sweet treats, it thinks you’re starving and increases cravings and hunger, making you eat more.

Will Not Eating Sugar Help You Lose Belly Fat?

Since eating sugary foods and refined carbs raises insulin levels, and high levels of insulin signal the body to store fat, Dr. Fung said that keeping your insulin levels low by limiting these types of foods, and focusing on lean protein and healthy fats, is a simple way to help lower your overall body fat percentage, reducing belly fat.

Is All Sugar Bad? What About Fruit and High-Carb Veggies?

Registered dieitian Claire Virga, MS, reminded us that there’s a big difference between added sugars like white sugar and maple syrup, and natural sugars, such as those found in fruit, vegetables, and complex carbohydrates. “Natural sugars are packaged with fibre and other important micronutrients. Fibre helps to blunt our blood sugar response to these foods, which promotes a stable rise in blood sugar,” Virga explained. “Unrefined sugars from complex carbs like vegetables get broken down over time and there is little excess sugar to be stored as it gets used for fuel,” added Dr. Tarman.

In contrast, added sugars are typically found in foods and beverages with little to no fibre like candy, baked goods, and soda. “These are the foods which promote the rapid increase in blood sugar and insulin and subsequent fat storage,” Virga explained. “When you eat refined carbs (think highly-concentrated large amounts of sugar — more than your brain needs or can use) the insulin has to spike to mop up the extra sugar. More gets sent to the fat cells; the belly fat cells,” Dr. Tarman said.

Registered dietitian and NYC-based certified diabetes educator Rachel Stahl, MS, CDN, pointed out that refined sugars can come from many sources. “Whether it’s granulated white sugar, high-fructose corn syrup, or something that sounds fancier, such as beet juice concentrate or raw sugar, these are all added sugars,” Stahl explained.

Can I Eat Sugar and Still Lose Belly Fat?

OK, so hold up. While fresh fruit is delicious, women cannot live on bananas and apples alone! Sometimes eating pie or chocolate (or both!) is a non-negotiable, am I right? Eating sugar can bring us joy and is often a part of celebrations and social gatherings. That’s good for our mental health, which is equally as important as our physical health. Plus, giving up sugar entirely can feel too rigid, and could lead to bingeing later. So can you still eat sugar and lose belly fat?

According to the American Heart Association, women should limit added sugar intake to six teaspoons per day (approximately 100 calories). “That means on a 2,000-calorie day, sugar consumption should be 25 grams.” suggested registered dietitian Anika Christ, RD.

Virga and Christ agree that most people know sugar is found in foods like candy and cookies but added sugars are hidden in so many processed foods. “Check food labels closely and you’ll find added sugar in things like sauces, dressings, cereals, yoghurt, juices, nut butters, and dried fruit,” said Virga. So be on the lookout and try to limit your daily added sugar intake to 25 grams.

Dr. Tarman said to focus on whole foods that are naturally sweet like fruit and veggies to satisfy your cravings, because the less refined sugar and simple carbs you eat, the more weight you will lose.

Best foods for diabetes (Eat This, Not That!)

50 Best Foods for Diabetes: Stock up on these expert-recommended low-carb superfoods that will keep your blood sugar steady. For most of us, dialing back on sugar and simple carbs is an effective way to fast-track weight loss. But for those living with diabetes, it can be a matter of life and death.Diabetics are two to four times more likely than people without diabetes to die of heart disease or experience a life-threatening stroke, according to the American Heart Association. And for those who don’t properly control their condition, the odds of health issues—which range from cardiovascular trouble to nerve damage and kidney disease—increases exponentially.Luckily there are plenty of delicious foods that are compatible with diabetes. We tapped registered dietitians and certified diabetes educators for their top food picks that are low-carb and low-sugar, but still high in flavor. These superfoods will keep your blood sugar in check without skimping on flavor. Bonus: Most of these foods are also packed with essential vitamins and antioxidants to fight off inflammation and keep your energy levels high. While you’re stocking up your grocery cart with these staples, be sure to avoid the 75 Unhealthiest Foods on the Planet.


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