No, one bottle will last 30 days. Well, the main difference between the two is that L-glutamine is "free form". This means that it is "free" from being bonded to other amino acids, which makes it less stable. It is still quite beneficial though. Glutamine peptides on the other hand are not "free"; instead it is bonded to other amino acids with peptide bonds. This makes it more stable and better assimilated by the body.