Hi John.

The pineal gland (aka third eye) definitely has a function. It is what enables ESP abilities, and connects us with the universe. Descartes called it “the seat of the soul”. According to Swami Satyananda Saraswati: “the pineal gland is the receptor and sender of the subtle vibrations which carry thoughts and psychic phenomena throughout the cosmos”. That is why reducing its abilities through crystalisation, if that's what fluoride does, is so regrettable, and possibly what the governments want.

Check out articles on Medium by Kimberly Fosu about the Third Eye.