Hidden Sugars in 'Healthy' Foods May Spike Your Blood Glucose

Many common foods, often seen as healthy, can cause rapid spikes in blood sugar. Items like store-bought granola, fruit juice, and flavoured yogurt may contain hidden sugars or lack fibre. Experts now recommend alternatives that help stabilise glucose levels over time.

Granola, despite its nutritious image, frequently includes added sugars, honey, or syrups. These ingredients, combined with refined carbohydrates, can raise blood sugar quickly. Similarly, a glass of fruit juice—even when freshly squeezed—can hold as much sugar as a soft drink. The juicing process strips away fibre, leading to fast glucose absorption.

Smoothies, often packed with fruit, juice, or sweetened yogurt, pose a similar risk. Blending breaks down fibre, making the sugar easier to absorb. Flavoured yogurts, too, contain high amounts of added sugar, which can sharply increase blood glucose, especially for those with prediabetes.

White rice, a refined grain, digests rapidly and lacks the fibre needed to slow glucose release. In contrast, scientific studies highlight oats as a better choice. Their beta-glucan content slows glucose absorption, helping manage type-2 diabetes more effectively.

The German Nutrition Society (DGE) supports low-glycaemic foods like legumes, whole grains, vegetables, berries, quinoa, and sourdough bread. These options provide steady energy and may reduce the need for medication in some cases.

Choosing whole, unprocessed foods can help maintain stable blood sugar levels. Replacing high-GI items with fibre-rich alternatives may improve long-term health, particularly for those managing diabetes or prediabetes. Experts continue to advocate for mindful food selections to avoid unexpected glucose spikes.