Sex and gender differences in nutrition research: considerations with the transgender and gender nonconforming population.

A sex- and gender-informed approach to study design, analysis and reporting has particular relevance to the transgender and gender nonconforming population (TGNC) where sex and gender identity differ. Notable research gaps persist related to dietary intake, validity and reliability of nutrition assessment methods, and nutrition interventions with TGNC populations. This is due in part to the conflation of sex and gender into one binary category (male or female) in many nutrition surveillance programs worldwide. Adoption of the Sex and Gender Equity In Research (SAGER) guidelines and the two-step method of querying sex and gender has the potential to exponentially increase the body of research related to TGNC health.