The appearance of a peptide can vary significantly depending on its sequence and should not be directly compared with other peptides. Peptides are typically delivered as a white lyophilised powder, and differences in appearance can arise due to various factors in the lyophilisation process. For instance, the freezing cycle rate can affect the peptide’s density; a slower freezing rate may result in a more compacted form. Additionally, varying amounts of water may evaporate during the drying phase, making the peptide appear less voluminous to the naked eye. The pressure applied during the process can also vary between batches. Although these factors might alter the visual appearance of the peptide in the vial, they do not affect the amount of peptide, which is precisely measured using an analytical balance.