Hi! Better to check with your OB or pedia muna bago mag-start ng Conzace, kasi they'll know best what's safe while breastfeeding and kung kailangan mo talaga nito. A few of us mums took vitamins during breastfeeding pero lagi naming tinatanong muna ang doctor namin, mas peace of mind, tsaka they can recommend what's best for you and baby. Sending you all the best with your breastfeeding journey!