Fagomine is a rare amino sugar found in the seeds of some legume plants. During the manufacturing process of fagomine, impurities can be introduced into the final product. These impurities can negatively impact the purity and efficacy of fagomine, making it important to identify and remove them through proper quality control measures. Accurate identification and quantification of fagomine impurities is critical for ensuring the safety and effectiveness of this potentially beneficial compound.