“Parents may perceive fruit juice as healthy, but it is not a good substitute for fresh fruit and just packs in more sugar and calories,” said Melvin B. Heyman, MD, FAAP, co-author of the statement. “Small amounts in moderation are fine for older kids, but are absolutely unnecessary for children under 1.”
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Scientists laid out instructions for older children, too. Toddlers who are ages 1 to 4 should only have one cup of fruit a day. Four ounces of that can come from 100 percent fruit juice, but it should be pasteurized and not labeled “drink,” “beverage” or cocktail.”
For children ages 4 to 6, fruit juice intake shouldn't exceed four to six ounces a day.
The amount increases just slightly for children ages 7 to 18. They can have up to two and a half cups of fruit servings, but only eight ounces of it should be juice.