Comment by bjourne
Fluoridated drinking water may explain the difference.
Fluoridated drinking water may explain the difference.
Not strictly true: https://www.dwi.gov.uk/consumers/learn-more-about-your-water...
Quote:
The water companies that are currently required by the Secretary of State to fluoridate some or all of their water supplies are:
United Utilities
Northumbrian Water
Anglian Water
Severn Trent Water
South Staffordshire Water
This isn't entirely true: https://www.gov.uk/government/consultations/community-water-...
Fun fact: I'm visiting Uruguay right now, and they have fluoridated salt here! (it's iodized as well)