Testosterone

Conversion to Estrogen

Muscle

• Selective estrogen receptor-β activation stimulates skeletal muscle growth and regeneration
• Estrogen receptor-alpha and -beta and aromatase knockout effects on lower limb muscle mass and contractile functionin female mice

Brain

• Androgens with activity at estrogen receptor beta have anxiolytic and cognitive-enhancing effects in male rats and mice
• Novel Actions of Estrogen Receptor-β on Anxiety-Related Behaviors
• The Anxiolytic and Antidepressant-like Effects of Testosterone and Estrogen in Gonadectomized Male Rats

Breast Cancer

• Estrogen receptor beta as a novel target of androgen receptor action in breast cancer cell lines

Nandrolone

• Nandrolone decanoate relieves joint pain in hypogonadal men: a novel prospective pilot study and review of the literature 
• Beyond testosterone cypionate: evidence behind the use of nandrolone in male health and wellness  
• How does Nandrolone Decanoate help joints and ligaments?