Thanks for the glycine clarification and adding the part about ammonia. I believe I do have an ammonia issue and just ordered some L Ornithine Alpha Ketoglutarate. Per a post from @ahmo, I saw some FMN was beneficial with her ammonia issues so I opened a bottle I had laying around. I seem to be a little more clear headed but very well could be placebo... To my dismay I'm also considering going very low protein to see if that helps. I'm familiar with the STTM protocols, I've been taking iron, selenium, and iodine for a few months now which may have something to do with it although the same protocol year(s) ago did not have the same effect. Also, I've scored pretty decently on a recent diurnal cortsiol kit BUT also start to get sleepy around 3pm every day.