⚠️CautionCurated
Melatonin (OTC Sleep Aid)
Melatonin supplements while breastfeeding are a gray area. Your body naturally produces melatonin, and breast milk contains melatonin that varies with your circadian rhythm (higher at night). However, supplemental melatonin doses (1–10mg) are far above physiological levels, and the effect on breast milk melatonin content and infant sleep regulation is not well studied. Occasional low-dose use (0.5–1mg) is probably fine.
Breast milk naturally contains melatonin, with levels peaking at night — this is thought to help establish the infant's circadian rhythm. Supplemental melatonin at typical OTC doses (1–10mg) provides 10–100x the physiological amount. While melatonin is generally considered safe, the concern during breastfeeding is whether large supplemental doses could disrupt the infant's developing circadian system. LactMed notes insufficient data. If you struggle with postpartum insomnia, try sleep hygiene measures first, and if you use melatonin, stick to the lowest effective dose (0.5–1mg).
Always confirm with your doctor or lactation consultant before making dietary changes while breastfeeding.
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