[Simmo @yoursimmo11](https://x.com/yoursimmo11) -
[2026-03-15 19:44 +0100](https://x.com/yoursimmo11/status/2033252892715655173) -
1.4M Views

I used Colgate, a fluoride-based toothpaste, twice a day, every day since I was a child.

Little did I realize that Fluoride competes with iodine at thyroid receptor sites. Same receptors and direct competition. Your thyroid needs iodine to produce T3 and T4. Fluoride blocks the door.

You're delivering a thyroid-suppressing chemical through the most absorbent tissue in your body. Twice daily. And your dentist told you it was essential.

Hydroxyapatite toothpaste remineralizes teeth without touching your endocrine system. Been around for decades. 

Japan uses it as standard.