You seem to be as fanatical about solving this issue as me, I'd love to hear what tests you want to get. Unfortunately, I have terrible brain fog, which mostly

You seem to be as fanatical about solving this issue as me, I'd love to hear what tests you want to get. Unfortunately, I have terrible brain fog, which mostly affects my working memory. This has plagued me for over a decade. As you noted, programming interviews are a nightmare. Through the autoimmune protocol diet I discovered caffeine has a negative impact on me. I've noticed a small, but not insignificant improvement through cutting out all caffeine. Previously, I drank several cups of coffee a day. I also took genetic testing and found I have some MTHFR mutations plus some other things, including a supposed indicator that I'm sensitive to caffeine, reaffirming my earlier findings. I've also cut out folic acid completely. However, I take these test results with a grain of salt, since there is mixed evidence of SNPs actual being of importance. I've also experimented with probably 30+ supplements. I'd say more than half the time, my brain fog worsens when supplementing. I've finally settled on just melatonin and glycine at night. With these, I actually remember my dreams, which I take as a good sign. Anyway, I've done very little blood testing recently, but in the past, a standard blood panel came back normal. Again, would love to hear what testing you had in mind.