Israeli researchers have discovered that a common pollutant (perchlorate salts – found in pesticides and automobiles) interferes with the proper functioning of the thyroid gland, leading to hypothyroidism. They built a detection device that uses a receptor molecule to alert to pollutant’s presence.

https://ats.org/ats-news/new-sensor-detects-chemicals-that-impair-thyroid-gland/

https://phys.org/news/2024-01-sensor-chemicals-impair-thyroid-gland.html

https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202302968