Mommies, hello everyone! What vitamin D do you give your babies? I giv…

Mommies, hello everyone! What vitamin D do you give your babies? I give Aquadetrim, but the pediatrician said to take another one because there's baldness on the back of the head, hair doesn't grow. She said to take in oil drops, which I give in water-based form. She said that there are good ones on Ayherb, but there are many of them. Suggest ??