Juice should not be introduced into the diet of infants before 6 months of age, unless directed by your physician. Occasionally small amounts of fruit juice may be recommended as a treatment for constipation.
In children ages 6 months -6 years, fruit juice offers no nutritional benefit over whole fruit. Whole fruits also provide fiber and other nutrients.
If you do let your kids drink fruit juice, do not allow your child to carry a sippy cup, bottle or box of juice throughout the day. Intake of fruit juice should be limited to 4 to 6 oz/d for children 1 to 6 years old. For children 7 to 18 years old, juice intake should be limited to 8 to 12 oz or 2 servings per day.
Never serve your kids unpasteurized juice.
These recommendations are for 100% fruit juice, which differs from juice drinks. Fruit drinks often provide little to no nutritional benefit.
OK, I admit it, I’ve bought juice boxes for birthday parties and soccer games. They are convenient, they keep kids happy, and they’re probably healthier than soda. But you just can’t tell from looking at a juice box if it is moldy—you won’t know until you start drinking, and sometimes you won’t know until you get to the bottom… So as for my family, we’re going back to the cooler of ice water for soccer games. If the kids complain, we’ll hand out good snacks.