Due to the natural interaction of ingredients like colloidal silver, iodine, and zinc, the mouthwash may gradually change in color (to gray or brown) and taste slightly stronger after several months. This is caused by mild oxidation and ionic reactions over time and can vary depending on storage conditions.
These changes are cosmetic and do not affect product safety, though they may indicate a natural shift in freshness or flavor intensity. For best quality, we recommend storing the product away from light, heat, and air.
Jul 21, 2025