Sequeira GM, Kidd K, El Nokali NE, et al. - In transmasculine adolescents (aged 13 to 19 years), researchers identified the impact of testosterone on BMI z-score at 6 and 12 months after initiation. Before and during testosterone use, a retrospective chart review obtained anthropomorphic data on transmasculine adolescents. To explore the change in BMI z-score after initiating testosterone, these measurements were used to create a linear mixed model. After 6 months of testosterone use, the increase in BMI z-score in transmasculine adolescents was significantly higher, but there was no significant change between baseline and 12 months. In order to provide adequate informed consent and create interventions to enhance health results, additional research is required to know the full short- and long-term effect of testosterone use on BMI z-score in transmasculine adolescents.