When you say you have appropriate LH and FSH levels. It makes you wonder, what are your levels presently at?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).