The most important aspect to consider when deciding whether to incorporate fruit juice into your diet is whether it fits into your recommended calorie intake. A half-cup of grape juice contains 80 calories; the same serving of apple juice has 60 calories, as does orange juice. If you wish to drink 100 percent juice and monitor your food intake accordingly to accommodate this, it can be a healthy way to increase your consumption of vitamins and minerals. However, juice can be extremely easy to over-consume, which may take you over your recommended daily calorie intake.