Andropause is real. So why the silence? While perimenopause finally gets its moment (thank you, celebrities and brave storytellers), andropause remains the elephant in every relationship. Men’s testosterone levels decline about 1 to 2% annually after age 30, according to research published in the Journal of Clinical Endocrinology & Metabolism. By their 50s, many men experience irritability, decreased libido, weight gain (hello, belly fat), sleep disruption, and mood changes. Sound familiar?