Specifically designed for children ages 1-13 with impaired GI function, Peptamen Junior® is a nutritionally complete, peptide-based pediatric formula that is well-tolerated and easy-to-digest.Peptamen Junior® formula contains 100% whey protein to support feeding tolerance. It also contains the CalciLock® blend of essential nutrients to support healthy bone development. This nutrient blend includes calcium, phosphorus, magnesium, zinc, and vitamins D, C & K and is designed to support bone health. Although each individual nutrient has a specific role, the nutrients work together to provide the CalciLock benefit.