HUMAN NUTRITION

Detailed explanation-1: -Dental fluorosis is caused by taking in too much fluoride over a long period when the teeth are forming under the gums. Only children aged 8 years and younger are at risk because this is when permanent teeth are developing; children older than 8 years, adolescents, and adults cannot develop dental fluorosis.

Detailed explanation-2: -Chronic fluorosis is a widespread disease-related to the ingestion of high levels of fluoride through water and food. Prolonged ingestion of fluoride adversely affects the teeth, bones and other organs and alters their anatomy and physiology.

Detailed explanation-3: -When the level of fluoride is above 1.5 mg/l (1.5 ppm) in drinking water, dental fluorosis can occur.