Peptamen 1.5 with Prebio1, Vanilla, 250ml - EachPeptamen 1. 5 with Prebio1, Vanilla, 250ml. 375 calories per each. The Peptamen family of products is designed for tolerance and is supported by 20+ years of clinical experience and evidence. Peptamen with Prebio1 is a 1. 0 Cal ml, whey peptide, 70% MCT formula that supports feeding tolerance. With Prebio1, a unique blend of prebiotics that helps maintain a healthy digestive system. For oral and tube feeding use. Includes: Peptamen 1. 5 with Prebio1,