Breast-feeding

Melatonin should generally be avoided in women who are breast-feeding their infants.(12) Reports describing the use of melatonin dietary supplements in women who are breast-feeding are lacking; however, it is likely to be excreted in human milk. Endogenous melatonin passes into human milk and concentrations have been measured in the breast-milk of lactating women; the results coincided with the women’s daily circadian rhythm of melatonin with undetectable levels during the day and high levels at night.(22)