Hello! :) my brother who is in his late 20's is having high fsh level 54. can you please tell me whether is it alright or if its dangerous? if so what

Testicular failure: Elevations in fsh suggest that the testicular cells responsible for sperm production aren't properly functioning. It is very important to identify the problem as there may be genetic reasons behind it. Additionally, fertility may be affected. Some centers may be able to preserve some sperm cells if he is en route to infertility. Your brother should be seeing an endocrinologist.