Also it means that if a person had a T
level of of 900 at his youthful age, and at sixty years if his T
level drops to 400 he could develop symptoms of low T even though he is within the normal range. At the same time, a person who had a T level of 500 when young, could be symptom free at 400 level and 60 sixty years of age. However, at any age, T levels below 200 is a definite indication of hypogonadism.