There is limited research on the safety of chlorophyll for pregnant women and breastfeeding mothers, so it is not known if chlorophyll is safe for these groups of women. However, it is generally advised that pregnant women should speak with their doctor before taking any supplements, as even small amounts of some supplements can potentially cause harm to a developing baby. Additionally, it is generally recommended that breastfeeding mothers limit their intake of food containing high levels of antioxidants to avoid possible interference with milk production. Accordingly, it is unknown if chlorophyll supplementation poses any additional risks to pregnant or breastfeeding women. As with all supplements, however, please consult your healthcare provider before starting this or any other supplement regimen.