Causes

Infants

Infants might have green stool as a result of:

• Not finishing breast-feeding entirely on one side, thus missing some of the high-fat-content breast milk, which affects the digestion of the milk
• Protein hydrolysate formula, which is used for babies with milk or soy allergy
• Lack of normal intestinal bacteria in breast-fed infants
• Diarrhea

Children and adults

Causes of green stool include:

• Diet high in green vegetables, such as spinach
• Food dyes
• Diarrhea
• Iron supplements