Testosteronmangel relateret til »relative energy deficiency in sport«

In this case report, a 29-year-old formerly healthy man presented with fatigue, reduced libido, and erectile dysfunction. He had lost 12 kg due to extensive training and disordered eating. Blood tests showed hypogonadotropic hypogonadism, low insulin-like growth factor-1, and anaemia. His condition was due to functional testosterone deficiency related to "relative energy in sport" (RED-S). Symptoms and testosterone levels improved following reduction in training load and weight gain, underscoring the importance of addressing energy imbalance rather than opting for testosterone therapy in this condition.