Hi,
This is a very tricky question that pops up in the mind of every parents. The main toughest task is to find the answer to the "When" to introduce juices to kids, during child growth stages.
Having said that, fruits do contain very essential nutritents which plays a vital role in children growth. But a lot of fruits alsoo contain considerable amount of sugar levels, which may adversely affect a child's health.
Hence, it is recommended to introduce juices to the kids in a controlled manner, keeping on mind the nutritional characteristics.
Hope this helps.
Best wishes.