Both grapefruit and orange are packed with vitamin C, a powerful antioxidant that boosts your immune system. A single orange delivers a robust 53mg of vitamin C, meeting 64% of your daily requirement.

Grapefruit is low-calorie, high-fiber, and enhances satiety, making it ideal for weight maintenance or loss when eaten before meals.

And those natural sugars can add up to lots of calories. A glass of fruit juice ranges from 100 (orange, grapefruit, apple) to 170 (grape and prune) calories for an 8-ounce serving. It's easy to ...