Similac.com--Similac Advance EarlyShield is the first and only DHA/ARA formula that has the EarlyShield blend. Because about 70% of the immune system is found in the digestive tract, developing a strong immune system from birth begins with creating a healthy digestive system. Your baby's gut relies on millions of "good bacteria" to support immune development. Special carbohydrates (prebiotics) found in breast milk and Similac Advance EarlyShield help stimulate the growth of these beneficial bacteria which helps support your baby's developing immune system. No other infant formula has our exclusive blend of prebiotics, nucleotides and antioxidants. If you try this, please let me know what you think.