§ Mr. Lawrence
asked the Secretary of State for Social Services what he considers to be the optimum dose of fluoride which: (a) children and (b) adults can consume daily consistent with the complete absence of dental fluorosis and certain health safety.
§ Mr. Moyle
Fluoride is naturally present in varying proportions in much of the diet and the intake consequently varies from person to person and from day to day. It is therefore impracticable to state an optimum dose, and the purpose of fluoridation is not to provide a54W specific dose of fluoride but to reproduce the beneficial effects of the most satisfactory proportion found naturally in drinking water, namely, in temperate climates, one part of fluoride per million parts of water. Extensive studies here and abroad have shown that this proportion of fluoride in drinking water, combined with the intake from the diet, is not associated with any harmful effect in children or adults.