Brain-Building Nutrientsīoth Enfamil Gentlease and Sensitive formulas contain brain-building DHA, previously only found in breast milk*. They are both formulas that have easy-to-digest proteins, but have different formulations based on your baby’s specific issues and needs. Enfamil Gentlease is formulated to reduce fussiness, gas and crying. There are several differences between the two formulas, but the main difference is that Enfamil Sensitive is designed for babies who have a lactose sensitivity. What is the difference between Enfamil Sensitive and Enfamil Gentlease formulas?