https://thekamagrashop.net/10-effects-testosterone-on-your-health 10 Effects Testosterone On Your Health Testosterone is an essential hormone that is mainly produced in the testicles in males and ovaries in females. As a primary sex hormone in males, it causes physiological changes such as muscle growth and development, growth of facial and body hair, penile growth, sperm production, bone development and strengthening, and voice changes.