Vitamin D?

What Vitamin D do you give your babies? I have been giving my 3 month old the Enfamil D-Vi-Sol which is what his pediatrician gave me; however, I am out and I went to buy more and I can’t find it in my store. I’m doing research on it and I’m realizing it has a lot of added ingredients. He takes it fine but I don’t like that idea. I’m wondering what brands you use? Thank you! I am looking at Baby D-Drops but I don’t want to just change brands without looking.