Breastfeeding mamas... vitamin d drops?

Marina • Married my best friend 05/19/18💗 Mama to my 12 fur babies💓 Ocean 🌊 06/13/19💕 baby #2 due 10/12/21

I’ve been doing research lately on everything I need to have before baby girl is here... are vitamin d drops a must when breastfeeding?? If so what is your favorite brand cause I saw a bunch of reviews where some had mold in the lid of the dropper already and where some grew mold inside the lid after a few weeks. FTM here😊