Fluctuations in Breast Milk: Understanding Daily Changes and Their Implications

September 18, 2025 - 02:02

A recent study has uncovered significant variations in the levels of melatonin and cortisol found in breast milk throughout the day. This research highlights the dynamic nature of breast milk, which can change in composition based on the time of day. For parents, this information is crucial as it may influence feeding practices and the overall well-being of infants.

Melatonin, known for its role in regulating sleep, tends to increase in breast milk during the evening and nighttime hours. This could potentially aid in establishing healthy sleep patterns for babies. Conversely, cortisol, a hormone associated with stress and alertness, is typically higher in the morning, which might help infants feel more awake and alert during the day.

Understanding these fluctuations can empower parents to optimize feeding schedules, ensuring that babies receive the benefits of breast milk's varying nutrients. As research continues to unravel the complexities of breast milk, this study serves as a reminder of its remarkable adaptability to meet the needs of growing infants.