Yes! Taking Natural Calm’s magnesium supplement while nursing is actually recommended by Dr. Dean. In her book, The Magnesium Miracle, she recommends that lactating/nursing/breastfeeding mothers should take about 600mg of magnesium due to their increased need for more magnesium. Enough magnesium during pregnancy will help with DNA formation of the baby and help ensure a healthier safer labour. Taking Natural Calm’s Magnesium while nursing will help to keep babies magnesium levels balanced and will help the baby sleep better and not have constipation issues.