Buy Enfamil Premium Powder Tub Baby Formula - 23.4 oz - Enfamil® PREMIUM™ now has Natural Defense™ Dual Prebiotics. We've improved the formula you trust to make it even more beneficial for your baby.Improved Enfamil PREMIUM with a unique, dual prebiotic blend, now promotes the growth of good bacteria throughout more of your baby's digestive tract than our previous formula. Your babys digestive tract is home to 70% of its immune system. Designed to act more like breast milk, our new, patented dual prebiotic blend now works longer in the digestive tract for more complete support compared to our previous formula.Prebiotics feed the good bacteria, found naturally in the digestive tract where 70% of your baby's immune system is located. And emerging science suggests prebiotic may support your baby's developing immune system. With Improved Enfamil Premium you can give a formula designed to help support your baby's natural defenses.Proven healthy development for your baby. Improved Enfamil PREMIUM still has Triple Health Guard™. It's a clinically proven formula to promote growth, to improve brain and eye development, and to support the immune system too. Including new Natural Defense Dual Prebiotics and Triple Health Guard, Improved Enfamil PREMIUM provides your baby complete nutrition at every feeding, in a formula designed to help support his immune system.Plus the latest in immune system support with benefits for respiratory and digestive health, you're supporting your baby's budding immune system. In fact, research suggests that feeding your baby Enfamil PREMIUM for his first 12 months could help give him a great healthy start through three years of age.The maker of Enfamil has more than 200 scientists, nutritionists, doctors and other experts with one mission: to make sure your baby gets the best. Because we just can't imagine anything more rewarding than nourishing your baby.