The fluoride content of infant formulas available in 1985.

Abstract

The purpose of this study was to measure the fluoride content of several brands of commercially available infant formulas obtained from various geographic locations in the United States. Fluoride determinations were accomplished using a modification of the Tares microdiffusion method. Ready-to-feed infant formulas were found to contain significantly more fluoride as a group than either the concentrate or powder types of infant formulas (P < 0.001). No significant differences in fluoride concentrations were found between the concentrate and powder types of infant formulas. Soy-based infant formulas were found to contain more fluoride than the milk-based formulas for all groups tested. These differences were statistically significant for the concentrate and powder types of infant formulas (P < 0.001). It appears that fluoride concentrations in infant formulas now are controlled at lower levels than has been reported in the past.