3,3′-Diindolylmethane (DIM) decreased the Streptococcus mutans biofilm, a leading contributor to plaque and cavities, by 90%. A significant portion of the global population experiences persistent issues with dental plaque and cavities or will face them at some time. While toothpaste, mouthwash, and
This is basically saying kale is good for you:
https://en.wikipedia.org/wiki/3,3'-Diindolylmethane
If I’m reading that link correctly, you need to digest the kale to release it, so it’s not going to help your teeth. Unless it can also come out via cooking or saliva?