Curcumin is a natural compound found in turmeric, commonly used in traditional medicine. However, the isolation and purification of curcumin can lead to the presence of impurities. These impurities can affect the quality and efficacy of curcumin-based products, and their identification and removal are crucial for ensuring their safety and effectiveness. Common curcumin impurities include curcuminoids, essential oils, and heavy metals. Proper quality control measures are necessary to minimize the presence of these impurities in curcumin-based products.