I have appropriate LH and FSH levels, and have almost from the beginning of starting TRT. I use Embrel (which is an immune suppressant) (I was able to wean off methotrexate almost a year ago, A chemo drug) and I take 4.5mg every bedtime of LDN, in my case, it is not reversing the "immune suppressant" effects of the Embrel, but acting as an immune modulator or enhancer. I am sure I am not the only one taking LDN, and TRT, I have RA (Rheumatoid Arthritis) which is why I take the TRT. (65% of men with RA have low T).