I have drank distilled water for over 20 years. I get my flouride from a natural source in the toothpaste plus a good diet. You also get fluoride in small amounts from almost every vegetable, you don’t need it in the tap water if you eat decently.
Just retired from 30 operating a public water supply. 5 deep wells, and no Fluoride. When people asked why we didn’t add that treatment, I told them to just use toothpaste with Fluoride. That way it only goes on your kid’s teeth.