Just stumbled on this paper fresh off the printing press and it caught my eye because I had heard Dorian Yates mention F as a pineal gland killer in an interview a while back:
Fluoride exposure changed the structure and the expressions of reproductive related genes in the hypothalamus–pituitary–testicular axis of male mice. Haijun Hana, Zilong Suna, Guangying Luoa, Chong Wanga, Ruifen Weia, Jundong Wanga, Chemosphere Volume 135, September 2015, Pages 297–303
They did a 60 day study on mice at low, medium and high dose of fluoride. Long story short in addition to some gene expression data, serum hormone levels and histological data they found that fluoride effects everything. In summary: F changed histological structure and ultrastructure of HPTA. The malformation ratio of sperm was significantly increased after F exposure.
An interesting sentence in the paper reads as follows: "From TEM (transmission electron microscopy) examination, the present results showed that, in hypothalamus, the structure of myelins disordered and the nuclear and mitochondria of neurons was damaged."
Demyelinization causes neurodegenaritve disease and muscluar dystrophy. Myelin is like the shielding on a copper wire that makes sure it doesn't touch other wires and short something out. I guess fluoride can help if your teeth are deteriorating, but keeping sugar out of your diet should keep your mouths pH in check as well. Anyhoo, I thought it was interesting and wanted to share with y'all.
(edited.. pineal gland not pituitary)