What is the antioxidant power ratio of red or purple skinned potatoes versus plain white varieties?

They possess nearly two to three times the antioxidant power found in plain white varieties.

Potatoes that exhibit red or purple pigmentation in their skins contain significantly higher concentrations of beneficial plant compounds compared to their paler counterparts. Scientific comparisons of antioxidant activity have demonstrated that this colored skin correlates directly with increased protective agents. Specifically, red potatoes have been shown to hold double the amount of flavonoid antioxidants when measured against white potatoes. This difference highlights that the visual cues, like skin color, are reliable indicators of a richer phytonutrient composition, making the colored varieties more potent sources of these disease-fighting compounds.