A glass of fresh orange or grapefruit juice with breakfast isn't just refreshing. It also delivers a healthy dose of vitamin C and potassium, which can be especially helpful if you tend to forgo fruit. Some store-bought juices are fortified with bone-building calcium, too.
But even when it contains only naturally occurring fructose from whole fruit and no added sugars to boost sweetness, fruit juice is still a concentrated source of sugar and calories, which can be problematic for those watching their weight or blood sugar.
