Sexual orientation modulates endocrine stress reactivity

Area of Science:

• Endocrinology
• Psychoneuroendocrinology
• Social Psychology

Background:

• Biological sex and gender diversity influence endocrine stress reactivity.
• Previous research indicates men often exhibit stronger stress responses than women.
• The impact of sexual orientation on stress reactivity remains underexplored, despite heightened distress reported by LGB individuals.

Purpose of the Study:

• To investigate differences in cortisol stress reactivity between lesbian, gay, and bisexual (LGB) individuals and heterosexual individuals.
• To examine how sexual orientation modulates endocrine stress responses beyond established sex differences.

Main Methods:

• Study included 87 healthy adults categorized by biological sex and sexual orientation (lesbian/bisexual women, heterosexual women, gay/bisexual men, heterosexual men).
• Salivary cortisol samples were collected over 2 hours during exposure to a modified Trier Social Stress Test.
• Data were analyzed adjusting for sex hormones, age, self-esteem, and disclosure status.

Main Results:

• Lesbian/bisexual women exhibited significantly higher cortisol stress reactivity compared to heterosexual women.
• Gay/bisexual men showed lower overall cortisol concentrations throughout the testing period than heterosexual men.
• These findings remained significant after controlling for relevant covariates.

Conclusions:

• Sexual orientation significantly modulates cortisol stress reactivity, independent of biological sex.
• This research provides novel insights into the physiological functioning of LGB populations.
• The study highlights the need for further research into gender diversity and physiological stress responses.