It is admirable gtaht you wish to become more infiormed about the ineffectiveness and health dangers of fluoride. 
Everyone should read the science for themselves.

1. Read the excellent book , "The Case Against Fluoride" authored by three scientists, one an M.D. It contains over 1200 scientific references (over 80 pages), showing that fluoride is ineffective for teeth and causes cancer, thyroid & pineal gland damage, 　 broken hips from brittle bones, lowered IQ in children, kidney disease, arthritis and other serious health problems.　

2.  Now fluoride has been proven to cause ADHD, as reported in  the “Journal of Environmental Health”  (by Malin & Till, 2015). Read the report yourself.


“Exposure to fluoridated water causes attention
deficit hyperactivity disorder (ADHD) prevalence among
children and adolescents”
http://www (DOT)feingold.org/Research/PDFstudies/Malin2015.pdf