Some people have trouble with memory and concentration and experience lowered motivation and self-confidence. For each year over age 30, the level of testosterone in men starts to slowly dip at a rate of around 1 percent per year. When your child's urine has high levels of these minerals and salts, they can form kidney stones. Cleveland Clinic’s Endocrinology & Metabolism Institute is committed to providing the highest quality healthcare for patients with diabetes, endocrine and metabolic disorders, and obesity. Low testosterone is a condition in which the testes do not produce enough testosterone . These medications can also come with the risk of serious side effects, so make sure you discuss all of them with your doctor beforehand.