With growing conversations around sugar consumption many people are beginning to question even nutrient-rich foods like fruit. Is the natural sugar found in fruit harmful in large amounts and does it behave the same way as refined sugar in processed snacks and soft drinks? UK surgeon and health educator Dr Karan Rajan has addressed these concerns explaining how fibre changes the way glucose from fruit is absorbed in the body and why whole fruits should not be grouped with ultra processed sugary foods.
According to Dr Rajan it is technically possible to consume excessive amounts of fruit but most individuals are nowhere near that level. He compares it to exercise noting that while overtraining is possible the average person is far from doing too much. When it comes to sugar intake he advises that the real concern should be added sugars found in highly processed foods rather than the naturally occurring sugars present in whole fruits.
The key difference lies in fibre. Fruits contain natural sugars packaged within a fibre matrix along with vitamins antioxidants and polyphenols. This fibre plays a crucial role in slowing digestion and moderating how quickly glucose enters the bloodstream. In contrast sugary drinks sweets and fruit juices lack fibre which can lead to rapid spikes and crashes in blood sugar levels.
Dr Rajan explains that when sugar is consumed without fibre it can cause a sharp rise in blood glucose followed by a quick drop. For people with healthy pancreatic function occasional spikes may not cause immediate harm but repeated high intake of added sugars over time can contribute to metabolic dysfunction. Whole fruits however trigger a more balanced physiological response.
Fibre slows gastric emptying meaning glucose is released gradually over several hours rather than minutes. It can also physically bind to some sugar molecules reducing their absorption efficiency so that fewer calories are effectively absorbed. In addition fibre supports improved insulin sensitivity helping cells respond more effectively to insulin. Another major benefit is satiety as fibre promotes fullness which can naturally reduce overall calorie intake in that meal and even the next.
Ultimately Dr Rajan cautions against fear driven nutrition trends circulating online. Demonising entire food groups including fruits can lead to confusion and unhealthy relationships with food. Instead he encourages a balanced nutrient dense diet focused on whole foods rather than obsessing over the natural sugar content of fruit.
