 The base of each formula may vary extensively, but Enfamil provides different formulae for different infants needs.While many of the ingredients in Enfamil meet with considerable approval, a growing number of watch groups point to ingredients that might not be safe.According to the United States Food and Drug Administration, test results have shown that traces of cyanuric acid have been found in Enfamil Lipil With Iron, however, the products still are approved by the FDA due to small consumption levels, being considered tolerable.