The lipid profile was similar between the groups, although BRCA1 LP/PV carriers showed a tendency toward a less favorable profile (higher LDL and lower HDL).<h4>Conclusions</h4>These prospective results suggest that BRCA1 LP/PV carriers might have impaired glucose tolerance and a greater tendency toward insulin resistance compared with BRCA2 LP/PV carriers: this first report needs further independent confirmations from other cohorts. Here, BRCA1 is linked to Impaired glucose tolerance.