New Method to Detect, Measure Potato Phytonutrients

WASHINGTONAgricultural Research Service (ARS) scientists in Prosser, Wash., have devised new analytical procedures for rapidly detecting and measuring phytonutrient concentrations in potatoes.

Using the new analytic methods, scientists profiled the phytonutrient contents of several hundred lines of wild and cultivated potato. Their analysis of phytonutrients known as phenolics showed concentrations that ranged from 100 to more than 1,500 milligrams per 100 grams dry weight in the potatoes. One type of phenolic, chlorogenic acid, is being tested for its potential to lower blood pressure. Also of interest are potatoes with high antioxidant activity, which is credited with helping neutralize cell-damaging molecules in the body called free radicals. Some potatoes boast antioxidant levels that rival vegetables such as spinach, the scientists reported.

Phytonutrients are plant compounds that are of particular interest for their potential to help diminish the risk of cardiovascular disease, respiratory problems and certain cancers.