Low testosterone can indicates lower than normal amount of male hormones, hormones are the substance messengers, they interact with tissue in the body and help to bring many changes. Androgen are the collection of sex hormones that provide male characteristics, it contain sexual reproductive function. Androgen deficiency means less than normal amount of androgen , mainly testosterone. They are also liable to increase secondary sexual characteristics in men such as beard, vocal cords, and physical body.
Testosterone is the most important sex hormone in men, which is produced in the male sex glands. The main symptoms of androgen deficiency are lack of sexual desire, over sweating, fatigue, stress, depression, decrease muscle strength and etc. Testosterone levels steadily decrease after the age of 40. The main important thing about testosterone still not fully understood why testosterone levels fall down in old people. You can maintain testosterone levels while doing physical activity but too much physical activity can be the cause of low testosterone.

