It's true - If you are using the Homeopathic Drops, you should not use mint. You should try using Tom's of Maine toothpaste... It contains no mint, and you can find it at Warlmart. The mint can make the Homeopathic Drops less effective.
I'm on day ten of the diet and have lost 12 pounds and I'm using the HCG oral drops. I have been using two different tooth pastes: Tom's of Maine -cinnamon clove and Burt's Bees all natural toothpaste for kids (orange). Neither of these contain any mint but they do contain glycerine or glycol as a natural sweetener (I'm not sure if this is bad for the diet but I seem to be doing ok with it). Personally, I prefer the Tom's.