Due to the prevalence of hair relaxer use by Latina and African American women, they may be at higher risk to develop uterine cancer. According to the Sister Study published in the Journal of the National Cancer Institute, approximately 60% of the participants were self-identified Black women who reported using straighteners in the previous year. 'Because Black women use hair straightening or relaxer products more frequently and tend to initiate use at earlier ages than other races and ethnicities, these findings may be even more relevant for them,' said Che-Jung Chang, Ph.D., an author on the Sister Study and a research fellow in the NIEHS Epidemiology Branch.