Baby formula comes with different ingredients and benefits. First make sure you find ready-to-use formula that is appropriate for your baby's age. Then determine if you want organic, soy-based or milk-based formula. Some formulas for the first year include DHA and ARA for brain and vision development. Others contain prebiotics to help with digestion. Review the ingredients to find a ready-to-use formula that will be soothing and nutritious for your baby.