Distilled water contains little to no fluoride; the distillation process removes most, if not all, of the fluoride in the water. Distilled water is water that has been purified by collecting steam from boiling water. Steam is collected by condensing the clean water vapor into a new container.
Drinking water is typically double distilled for higher purity, although some researchers worry that distilled water is too clean. They express concern that the removal of naturally occurring minerals and ions found in drinking water leads to health problems.
Small home distillation units cost as little as $200, while large units cost $1,000 or more.