Momordicoside is a natural compound extracted from the fruit of the bitter melon plant. However, during the extraction process, impurities may be introduced, which can affect the purity and potency of the final product. These impurities may include other plant extracts, residual solvents, or other contaminants. It is important to ensure that the level of impurities is minimized during the production of momordicoside to ensure its safety and efficacy for use in herbal medicine.