We use Bromelain (1%) and Papain (1%) in our unique formula which together make up the 2% of fruit enzymes in the Brighten Toothpaste.
Bromelain is derived from the stems and fruit of pineapple plants. Similarly, Papain is a proteolytic enzyme extracted from the raw fruit of the papaya plant. While both of these enzymes are known to have a significant number of health benefits when consumed as dietary supplements, they are also known to be effective stain removal agents when used on the surface of the tooth.
These natural enzymes are less abrasive than alternatives such as baking soda or charcoal and far less damaging than peroxide-based whitening solutions.
Resources:
1. Efficacy of Extrinsic Stain Removal by Novel Dentifrice Containing Papain and Bromelain Extracts
2. Characterization of the Mechanism by Which Papain Suppresses Tooth Discoloration
3. Novel in-office peroxide-free tooth-whitening gels: bleaching effectiveness, enamel surface alterations, and cell viability