Thank you for getting back with me on this. I appreciate it deeply.That's a tough question, however if you want to go as natural as possible and don't want SLS and toxic flouride , then go with a powder. On a side note, almost all commercial toothpastes contain formaldehyde , but the cosmetic companies " take care " of the FDA , so they do not have to list it. Most countries demand it to be listed...Is Your Toothpaste Full Of Carcinogens?