This project examined the attitudes of sexual and gender minority youth (SGMY) toward guardian permission for a pre-exposure prophylaxis (PrEP) adherence trial and their preparedness to provide informed, rational and voluntary self-consent. Sixty sexually active SGMY (ages 14–17) participated in online survey and asynchronous focus group questions after watching a video describing a PrEP adherence study. Youth responses highlighted guardian permission as a significant barrier to research participation, especially for those not “out” to families. Youth demonstrated understanding of research benefits, medical side effects, confidentiality risks, and random assignment and felt comfortable asking questions and declining participation. Reasoning about participation indicated consideration of health risks and benefits, personal sexual behavior, ability to take pills everyday, logistics, and post-trial access to PrEP. Results demonstrate youth’s ability to self-consent to age- and population- appropriate procedures, and underscore the value of empirical studies for informing IRB protections of SGMY research participants.