What kind of juices babies can drink
Most babies don't need to drink juice - they get all of their nutrition, vitamins, and minerals at first from breast milk or formula, and later from solid foods. The digestive tract of young babies (under 6 months) lack sufficient quantities of necessary dietary enzymes to adequately digest the high level of sugars found in juice.
Many types of juice are loaded with sugar, and you don't want to get your kid hooked on sugary beverages at this early stage. If you do decide to give your baby juice, it's best to wait until she's at least 8 months and can drink out of a sippy cup, because putting juice in a bottle can cause tooth decay. One exception: Some pediatricians may recommend certain types of juice, like prune or pear, to help babies with constipation, but always check with your doctor before doing this.
Be sure to choose brands labeled 100 percent fruit juice (these may have less added sugar than other kinds) and dilute it with about half water. Keep in mind that a baby can develop diarrhea from drinking too much juice, so limit her intake to no more than 4 ounces a day.
Limit your child's fruit juice consumption to the following...
6 - 12 months 4oz or 120ml per day = 1/2 cup
1 - 4 years 6oz or 180ml per day = 3/4 cup
4 - 12 years 8oz or 240ml per day = 1 cup
12 - 18 years 12oz or 360ml per day = 1 1/2 cups