By Cathy 
Since best testosterone booster affects the entire metabolism, the administration of testosterone to a man with normal testosterone levels can also have undesirable consequences in all areas of the body. The list is massive: breast growth, breast pain, shrinkage of the testicles, testicular pain, decrease in sperm count, weight gain, appetite, increased blood lipid levels, water retention, changes in blood salts, increased percentage of blood cells, restlessness, insomnia, irritability, emotional disorders, aggressiveness, depression, drowsiness, headache, migraines, tremor, hot flashes, dizziness, high blood pressure, cardiovascular disorders, cough, snoring, diarrhea, nausea, changes in liver function values, acne, baldness, Joint pain.
Decreased growth during puberty
Excessive testosterone administration during puberty also ensures that the growth plates of the bones close prematurely and thus the actual possible body size is not reached.
No bigger penis through testosterone administration
Testosterone administration during puberty ensures growth of the male sexual organs including the penis, but the penis is not larger than genetically given and possible. If the penis is fully grown after puberty, it will not be possible to enlarge the penis with additional testosterone.
No better erectile function through testosterone administration
Testosterone is important for the desire to have sex, and testosterone levels well below the normal range are usually associated with increasing sexual listlessness. However, testosterone is of minor importance for erectile function. For example, neutering a man does not necessarily have to result in a total loss of his erectile function. And conversely, studies read that testosterone administration in men with testosterone deficiency can lead to an increase in libido and more nocturnal erections, but erectile function during sex does not improve.