Eh, at one year babies usually dah boleh makan most foods so they can get vitamins from their diet, though honestly, a lot of us mums still give vitamin supplements for peace of mind, especially kalau anak picky eater! Best to check with your pediatrician first la, because they'll know if your little one actually needs it or just makanan saja sudah cukup. Every baby is different, mine needed a boost sebab she wasn't eating much variety, but a few of my mum friends' babies didn't need extra once they started solids properly.