Sugar: It's sweet, it's tempting, and it's everywhere. But what exactly does it do to your body, and how can you avoid the inevitable energy crash?
Let's face it: sugar tastes amazing! We're wired to love it. Back in the day, when honey was a rare treat and we were busy chasing our next meal, that sweet tooth served us well. Now, with sugar readily available and our lifestyles less active, that same craving can work against us. Many of us consume far too much sugar, which can lead to various health problems. But is sugar inherently 'bad,' or is it simply a matter of too much of a good thing?
"When we taste sugar, our bodies react instantly," explains Dawn Menning, a registered dietitian. "The brain recognizes it as a quick energy source and triggers the reward system, releasing dopamine, which makes it so appealing." But here's where it gets interesting: not everyone experiences sweetness the same way. Research has shown that genetics play a role. Identical twins have similar sweet taste perceptions, suggesting that about 30% of how we taste sweetness is down to our genes. However, it's still unclear if this affects how much sugar we consume.
What happens after that first taste depends on the type of sugar. Glucose, found in table sugar, treats, and starchy foods, has slightly different effects than fructose, common in fruits and juices.
"Glucose prompts the pancreas to release insulin," says Sarah Berry, a professor of nutrition. "Insulin removes glucose from the bloodstream and stores it for energy, either in muscles or the liver as glycogen, or converts it into fat." Fructose, on the other hand, doesn't trigger insulin release. "It goes straight to the liver, where it can be converted to glycogen or, if consumed in excess, fat."
Both glucose and fructose, when overeaten, can increase triglycerides, a type of fat in your blood. While necessary for energy, high levels can raise the risk of heart disease, stroke, and pancreatitis. Fructose is a bigger concern for those at risk of fatty liver syndrome, while glucose is more of an issue for people struggling with insulin regulation. So, which sugar should you worry about more? It depends on your lifestyle and genetic predispositions.
"Excessive and repeated insulin spikes can increase inflammation," Berry adds. "While inflammation is a normal bodily process, too much can become problematic."
The 'sugar rush' is a myth! Studies have shown that sugar doesn't actually affect children's behavior or cognitive performance. More recent research found no mood-boosting effects from sugar and even noted increased fatigue and reduced alertness. So, if your kids seem hyper after a sugary treat, it might just be the excitement of the moment, or even a placebo effect!
But here's the real problem: the crash that follows the sugar high.
"Our research shows that a post-sugar dip can lead to increased hunger and the consumption of more calories at the next meal," Berry says. "This means you could end up eating 80 more calories at your next meal and 320 more calories throughout the day."
It's not just about how much sugar you eat, but when and how you eat it. "Blood sugar response is better in the morning because you're more insulin sensitive," Berry notes. "Our bodies also handle sugar better when it's part of a balanced meal with healthy fats and proteins. The idea of completely 'flatlining' your glucose response, as some influencers suggest, isn't necessary. A rise in blood glucose is a normal response to eating; we just need to ensure it's not excessive."
The bottom line? We eat too much sugar. A recent study revealed that 84% of us have at least one sugary snack daily, with 79% consuming up to three. It's wise to cut back, but there's no need to eliminate sugar entirely. Enjoy it in moderation, preferably earlier in the day, and alongside fiber, healthy fats, or protein.
What about sugar substitutes? That might not be the perfect solution you're hoping for. It was once thought that artificial sweeteners could cause insulin spikes or trick hunger hormones, but that doesn't seem to be the case. The problem lies elsewhere.
"There's emerging evidence that sweeteners like saccharin and sucralose can affect your oral and gut microbiome," Berry says. "More research is needed to understand the long-term effects on health, such as blood pressure, insulin resistance, and weight." It's also possible that some sweeteners are converted to fructose in the body, triggering similar effects to regular sugar.
Until we know more, get your sweetness from sugar – it's what we're built for. Just remember: our ancestors didn't have the same access to sugar that we do, and they were a lot more active.
What are your thoughts? Do you find it hard to cut back on sugar? Are you concerned about artificial sweeteners? Share your opinions in the comments below!
