How does the fiber content in whole grapes mitigate rapid blood sugar spikes?

By slowing down the absorption of the fruit's natural sugars

While grapes naturally contain sugars, their overall impact on blood glucose is moderated by the presence of dietary fiber when consumed as a whole fruit. The fiber component is crucial because it acts as a physical buffer in the digestive tract, specifically slowing the rate at which the natural sugars are absorbed into the bloodstream. This controlled digestion process prevents the sharp, rapid peaks in glucose that can place strain on the body's regulatory systems over time. This feature contributes to the generally moderate glycemic index of grapes, making them a better choice than highly processed carbohydrates or even grape juice for managing blood sugar effectively.