Periogen is a product that has received positive reviews from users. It is described as effective in reducing tartar buildup. However, it's important to note that results may vary depending on individual dental hygiene practices and the severity of tartar buildup. Some users have reported noticeable differences after using Periogen, while others have expressed skepticism about its effectiveness. As with any product, it's recommended to do thorough research and consult with a dental professional before use.