Where are the highest concentrations of phenolic acids and antioxidant compounds particularly concentrated in the peanut?

The thin, papery peanut skin

The antioxidant capacity of peanuts is remarkably high, and the location of these beneficial compounds is specific. The highest concentrations of beneficial elements, such as phenolic acids—including *p*-coumaric acid which boosts overall antioxidant content—are specifically found concentrated in the thin, papery layer covering the peanut kernel, known as the peanut skin. Consuming unblanched peanuts ensures the intake of these potent compounds. This high concentration is a key factor differentiating the nutritional benefit derived from skin-on versus blanched peanuts.