Black-eyed peas have a high nutrient content, and they are an excellent source of plant protein, iron and zinc, according to the U.S. Department of Agriculture. In addition, black-eyed peas provide high levels of dietary fiber, potassium and folate, and they include vitamin A in the form of beta-carotene.
One cup of black-eyed peas provides 20 percent of the recommend daily amounts of calcium, iron and magnesium, reports SFGate. One of the food's biggest benefits is its large amount of soluble fiber. This makes black-eyed peas especially helpful for those who are trying to keep their blood sugar levels balanced.