Because of the fiber in fruits and vegetables, your body digests them more slowly. Thus, the sugar enters your bloodstream more slowly.
It's kind of like the difference between drinking a beer on a full stomach versus an empty stomach.
In this case, 25g of sugar entering your bloodstream quickly is quite unhealthy.
(Related: If you want to understand this better, stop consuming refined sugar for about a month. Then go eat a peep on an empty stomach. You'll feel an intense sugar rush.)
> Most nutritionists agree you shouldn't have more than 5g of sugar outside of fruit sources-
So nutritionists do or don’t agree that it should also include vegetable sources?
Related: I’m T1 diabetic and my partner had to call 911 last week because of hypoglycemia. If I hadn’t consumed 25g of sugar quickly the result would’ve been quite unhealthy.
Starchy vegetables like potato, corn, and peas are nutritionally distinct from non-starchy veggies. But their sugar is packaged with vegetable fibre, which results in slower absorption than if you drank the same amount of sugar in liquid form on an empty stomach.
It feels a bit redundant to point out to a T1D that fruits are far higher in sugar than non-starchy veggies, which is why OP specifically mentioned fruit sources of sugar.
It's kind of like the difference between drinking a beer on a full stomach versus an empty stomach.
In this case, 25g of sugar entering your bloodstream quickly is quite unhealthy.
(Related: If you want to understand this better, stop consuming refined sugar for about a month. Then go eat a peep on an empty stomach. You'll feel an intense sugar rush.)