research 310 Clinical Improvements in Erectile Function and Mood in Hypogonadal Men Treated with 4.5% Nasal Testosterone Gel (Natesto) February 2018 in “The Journal of Sexual Medicine” Natesto nasal gel improves erectile function and mood in men with low testosterone within 30 days.
research 311 Novel Penile Ultrasound Technique to Explain Mechanism of Erectile Dysfunction (ED) in Young Patients using Finasteride for Androgenic Alopecia 1 citations , February 2018 in “The Journal of Sexual Medicine” Ultrasound shows 96% of young men with erectile dysfunction after using finasteride have abnormal penile tissue.