A U.S. couple faces charges after their 10-month-old daughter died from diluted breast milk. While formula feeding requires precise measurements, diluting breast milk poses similar deadly risks.
This heartbreaking story underscores a critical warning for parents.

Diluting donated or purchased breast milk with water disrupted the infant's electrolytes, causing brain swelling and death. Though details vary, the core issue remains: stretching milk supply this way increases bottle volume but slashes vital nutrients.
Dr. Ashanti Woods, a pediatrician at Mercy Medical Center in Baltimore, Maryland, advises: Never dilute breast milk or formula. "Babies' electrolytes must stay at precise levels—they don't adapt well to changes," he explains. "Imbalances can cause lethargy, seizures, or even death."
Rachelle Lesteshen, a U.S. breastfeeding consultant, adds: "Breast milk delivers the exact nutrients babies need for growth. Diluting it reduces those essentials, risking severe issues like excessive weight loss."
According to KellyMom, breast milk fully nourishes babies—even in hot weather—if fed on demand.
Dr. Woods also cautions against skimping on formula powder to save supply. Always follow package instructions, as they differ by brand. Under-diluting turns nutrient-rich milk into watery substitute, depriving babies of fats and calories they need.
Most pediatricians recommend no plain water for babies under 6 months (guidelines extend to 9 months in some cases). Milk provides essential energy—water does not.
Rather than judge, experts urge education. "If supply is low, consult your pediatrician or lactation consultant for safe options," says Rachelle. Reach out to local La Leche League or trusted breastfeeding resources for guidance.