People should not swallow fluoridated toothpaste.
People across the UK have been advised to avoid swallowing fluoridated toothpaste in order to get stronger teeth. 
Colin Shaw noted in a letter to Halifax newspaper the Evening Journal that adding fluoride to the water supply can be beneficial to oral health, but consuming large quantities of fluoride in toothpaste definitely is not.
He wrote: “I read a newspaper article by a member of the British Dental Association who explained that for fluoride to be effective in preventing tooth decay, it had to be ingested because tooth enamel is not permeable.”
However, Mr Shaw noted eating large quantities of toothpaste could be detrimental to a person’s health.
Elsewhere, Radio NZ reported the Northland District Health Board in New Zealand recently completed a two-year tudy into the benefits of adding fluoride to drinking water in the region.
It found that in the areas where fluoride had been added, incident rates of cavities in five-year-olds fell by five per cent.