I’ve read somewhere that ingestion of fluoride causes the body to retain aluminum in the brain and that aluminum deposits were found during autopsies in the brains of deceased who were suffering from Alzheimer’s.
You’re right.
Municipal water supplies in the US are frequently and deliberately tainted with aluminum fluoride as opposed to stannous fluoride which is what you want for dental health.
It is of note that aluminum fluoride (under the name ‘FLUoxetene’) is the active ingredient in Prozac.
Use iodine to detox fluoride. Also get a Berkey water filter to remove fluoride, chlorine, arsenic, etc.. from your drinking water.