Men's Hormone Optimization Testosterone Therapy Meridian an low testosterone cause erectile dysfunction, how to help with ED Peptides for Optimal Testosterone Levels Alpha Rejuvenation My current stack as a 40 Year Old Action Actor This isn't about shortcuts. It's about intentional optimization, proper medical oversight, and supporting training, recovery, and sleep so my body can Testosterone is an androgen that helps generate the biological characteristics associated with male sexuality. Its effects begin in fetal development, when genes on the Y chromosome trigger testicle development around week 7.