1 in 4 men affected
Low testosterone impacts a significant portion of the male population, with prevalence increasing to 40% in men over 45
Andre B. Araujo, Gretchen R. Esche, et al. Prevalence of Symptomatic Androgen Deficiency in Men, The Journal of Clinical Endocrinology & Metabolism, Volume 92, Issue 11, 1 November 2007, Pages 4241–4247