Radicchio lettuce is an excellent source of dietary fiber, vitamins A, C, and K, thiamin, folate, iron, potassium, manganese, riboflavin, vitamin B6, calcium, magnesium, phosphorus, and copper.
tore them unwashed in a loosely closed plastic bag in the refrigerator. Wash the leaves, dry them thoroughly, and refrigerate them in a tightly sealed plastic bag.