Grapefruits are large, round citrus fruits known for their tangy and slightly sweet flavor. They come in various colors, including yellow, pink, and red, with the pink and red varieties often being sweeter. Grapefruits are rich in vitamins, especially vitamin C, and are a popular choice for breakfast or as a refreshing snack. These fruits are often enjoyed fresh, juiced, or added to salads. They can also be used in cocktails, like the classic Paloma, which combines grapefruit juice with tequila. However, it's important to note that grapefruits can interact with certain medications, so it's wise to consult a doctor if you're on medication.