Sunlight Vitamins, their mission is to make the best product for your baby-Just D, which is simply vitamin D3 and pure corn oil. Just D was developed after their Medical Director (a practicing Pediatrician) noticed an alarming nationwide increase in rickets and recognized a great need for a single entity vitamin D infant drop. He also noted many complaints from parents about the existing multi-vitamin drops, namely the bad taste that caused spitting up and vomiting, the staining of clothes and intake of unnecessary vitamins.