Men · California
Studies open only to men in California
These studies list male participants only in their official record. Most other studies accept everyone regardless of sex.
33 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteers
Sexual Health Advocacy for Guys - a Text Messaging-based HIV Prevention Program for Guys Who Are Into Guys
Center for Innovative Public Health Research
- Location
- San Clemente, CA
- Eligibility basics
- Ages 13–22 · Men only
- RecruitingHealthy volunteers
Prostate Cancer Screening for People at Genetic Risk for Aggressive Disease, PATROL Study
University of Washington
- Location
- Duarte, CA + 6 other US sites
- Eligibility basics
- Ages 40+ · Men only
- RecruitingHealthy volunteers
California MEPS Hub
University of California, Los Angeles
- Location
- Oakland, CA + 2 other US sites
- Eligibility basics
- Ages 18–59 · Men only
- RecruitingHealthy volunteers
Chardonnay Marc and Vascular Response
University of California, Davis
- Location
- Davis, CA
- Eligibility basics
- Ages 30–50 · Men only
- RecruitingHealthy volunteersPhase 2
Fiber and Calcium Absorption in Older Men
VA Office of Research and Development
- Location
- San Francisco, CA
- Eligibility basics
- Ages 60+ · Men only
- RecruitingHealthy volunteersPhase 2
Randomized Phase II Trial of Targeted Radiation With no Castration for Mcrpc
VA Office of Research and Development
- Location
- West Los Angeles, CA + 3 other US sites
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Testing a Gender-inclusive HIV Prevention Program
Center for Innovative Public Health Research
- Location
- San Clemente, CA
- Eligibility basics
- Ages 14–18 · Men only
- RecruitingHealthy volunteersPhase 2
PrEPsmart 2-1-1 Pilot
Public Health Foundation Enterprises, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Focal Therapy for Localized Prostate Cancer
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18+ · Men only