FLUORIDE IN HUMAN MILK

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Abstract
Reported contents of fluoride (F) in human milk vary considerably. The F content in human milk was determined under different levels of F intake using a Si-facilitated microdiffusion technique, which had a good accuracy and precision. The mean F concentration of colostrum from mothers in a 1.0 ppm and a 0.2 ppm F area was 0.36 .+-. 0.02 .mu.mol/l (.+-. SEM [standard error of the mean]) and 0.28 .+-. 0.02 .mu.mol/l, respectively. The mean F concentration of mature milk from a 1.0 ppm F area was 0.37 .+-. 0.04 .mu.mol/l. Within the 1.0 ppm F area, the intra- and interindividual differences in F concentration were very small. No statistically significant difference in milk F concentration between the 2 areas was found. Breastfed infants living in a 1 ppm or a 0.2 ppm F area will have an approximately equal F intake of 5-10 .mu.g/day, in spite of great differences in F intake among the nursing mothers.
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