Studies have suggested that the following cow-based baby formulas may increase your baby’s risk of developing necrotizing enterocolitis: Similac Special Care 20 Similac NeoSure Similac Special Care 24 Similac Special Care 30 Similac Special Care 24 - High Protein Similac Liquid Protein Fortifier Enfamil Human Milk Fortifier Enfamil NeuroPro EnfaCare Enfamil 24 Cal