Testosterone, also known as testosterone or testosterone, is secreted by the testes in men or by the ovaries in women, and to a lesser extent by the adrenal glands, and is used to maintain muscle strength and mass, maintain bone density and strength, and boost energy and physical performance. Testosterone affects multiple body systems and functions including: hematopoiesis, calcium balance in the body, bone mineralization, lipid metabolism, glucose metabolism and prostate growth. It is the main male sex hormone and anabolic hormone. According to statistics, the amount of testosterone produced by adult males is 20 times greater than that produced by adult females. Testosterone is also an important reason why boys are active, competitive and adventurous, and aspire to be the strongest, bravest and toughest men, and plays a vital role in their growth and development. Although the level of testosterone affects male sexual performance, what other specific effects does low testosterone levels have on men? (1) Lack of energy. A person who was mentally energetic becomes extremely tired or overworked, which may be the reason for the decrease in testosterone levels. The level of testosterone affects a person’s energy, and adequate sleep is a good medicine to improve energy. (2) Mood changes. Low testosterone often makes a person feel depressed, with mood ups and downs over a period of time, and a lack of interest in things you once enjoyed, and nothing seems to make you happy, which could be the cause of low testosterone levels. (3) Muscle effects. High testosterone levels help build muscle, when it becomes low, muscle and strength will also be correspondingly low, although the length of exercise does not change, but it does not achieve the desired results. (4) Sparse body hair. Testosterone levels decrease, men’s hair, sweat hair, pubic hair, etc. will be correspondingly reduced, because the lack of hormones within the body to stimulate hair growth. (5) Increased fat. Lower testosterone levels can not only ring the muscle growth of men training, but also increase fat to some extent. When you do not exercise muscle when you take in calories, the calories taken into the body will be converted into fat, and only if the body secretes more testosterone, you can build back the lost muscle. (6) Osteoporosis. Lower testosterone levels may cause osteoporosis, leading to bone loss in the body, to have strong bones, adhere to exercise to help prevent osteoporosis. (7) Affects work. Low testosterone levels can lead to poor concentration and low mood, a series of problems that can make it difficult to maintain a good state at work. As men age, testosterone production will decline and intake is insufficient. Therefore, it is very important for men to supplement testosterone in the right amount, but only under the guidance of a professional doctor.