Exogenous hormone exposure can cause early sexual development, but only one report suggests that this may occur secondary to the use of hair-care products. This study evaluated the usage frequency and biological effects of hormone-containing hair-care products. We reviewed the records of 102 consecutive dependent children referred for evaluation of sexual precocity. Eight children (7.8%) were using these products. All eight were black (100%), compared to 57 (61%) of the 94 patients not using such products (p < 0.05). There was no significant difference between these two groups in mean age, sex distribution, height, height standard deviation score, bone age:chronologic age ratio, or serum estradiol level. We conclude that exposure to hormones in hair-care products may be more frequent than expected and should be considered in the differential diagnosis of early sexual development in children.
ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health