You don't need supplements man. You need to get to the dentist every 6-9 months for a standard cleaning and any work that needs to be done. Brush your teeth in the AM and PM. Make sure you floss (makes the biggest difference). Being hydrated is a huge part of having good breath too.
I've found that taking vitamin D and calcium supplements, along with regular brushing and flossing, helps keep my teeth and gums in check
(but always monitor the fluid you drink if you buy calcium as you can grow kidney stones, you know)