For relieving constipation, the recommended amount of prune juice varies by age and severity, but general guidelines are as follows:

• Adults: Half a cup (4 ounces) twice a day is commonly suggested for mild constipation. Some studies and experts recommend up to 8 ounces in the morning to stimulate bowel movements effectively

. Starting with 4 ounces in the morning and adjusting based on response is advisable

. Drinking about 1 cup (200 grams) daily has also been shown to help with chronic constipation without causing diarrhea or gas

• Children: For infants and young children, 2 to 4 ounces of prune juice can be given to relieve constipation. For children aged 4 to 6, 4 to 6 ounces daily is typical, and for those 7 to 18 years old, about 8 ounces daily may be appropriate

Prune juice works primarily due to its high sorbitol content, which draws water into the intestines, softening stools and promoting bowel movements. It also contains fiber, magnesium, potassium, and other compounds that aid gut function

. It is important not to overconsume prune juice because of its high sugar content, which can lead to unwanted side effects such as diarrhea, gas, or weight gain

. Starting with a smaller amount and increasing gradually while monitoring effects is recommended. If constipation persists or is severe, consulting a healthcare provider is necessary

Summary

• Adults: Start with 4 ounces twice daily; up to 8 ounces in the morning is common.
• Children: 2-4 ounces for infants; 4-6 ounces for ages 4-6; 8 ounces for older children.
• Monitor for side effects and adjust intake accordingly.
• Consult a doctor if constipation continues or worsens.

This approach balances effectiveness and safety for using prune juice as a constipation remedy.