Studies show that extremely low testosterone levels can affect the glucose tolerance tests, the ones used to detect problems with sugar. Low testosterone can be predictive of type 2 diabetes in men, as shown in many different studies. As men grow older and low testosterone is sustained, many different side effects would likely appear:
- Reduced sexual drive: They are the most common symptoms of low testosterone levels, and they would increase as time goes by. Sexual dysfunction has three basic symptoms: erectile dysfunction, decreased sexual desire, and poor morning erections.
- Undernutrition: Studies show that patients with sustained low levels of testosterone have a worse nutritional status than those who have normal levels. A reduction of appetite and food intake might be one explanation. Also, testosterone is a potent anabolic, and very low levels may cause changes in body composition, such as weight gain and loss of muscle mass.
- Fractures: Men with low testosterone have an increased bone resorption, which means that their bones become more fragile and weak. Adding to that, older men with sustained low testosterone may suffer a fall and easily fracture.
- Anemia: Testosterone stimulates the formation of new red blood cells, which is why normal hemoglobin levels are higher in men than women. Low testosterone levels cause low hemoglobin levels and risk of developing anemia.