I recommend Tep Thai toothpaste, the Thai pea-sized toothpaste.

This is Tep Thai toothpaste, also known as "pea toothpaste," which I bought while traveling in Thailand. It's called "pea toothpaste" because if you squeeze out too much like you would with Korean toothpaste, it gets spicy, so squeezing out just a tiny bit—about the size of a bean—is effective. I bought it for my parents to take care of their gums, but I'm using it too. It's good for gum care and bad breath, so I think it would be even better for smokers. Haha. If you're traveling to Thailand, give it a try!