A half cup of canned peach slices in heavy syrup contains approximately 4.5 teaspoons of added sugar.
Not only does that tack on 72 completely worthless calories, it also offers one more teaspoon of added sugar than a glazed Dunkin' Donuts concoction.
As for the 10% of the potassium daily value offered in half a cup of natural peach slices? It decreases by half in its canned form.
Vitamin C levels are also slashed by 50 percent when peaches undergo this kind of processing.