...around age 3, but until he is able to tolerate the whole proteins in dairy, soy, rice, and corn, his parents need to monitor his diet closely to prevent horrible flu-like reactions. After about 6 weeks on the elemental formula and PPI, Roland went from an exceptionally uncomfortable, clingy, miserable infant who never smiled or slept to a completely independent, fun-loving, easy to care for baby. It was literally a night/day transition. His parents were...