I have been feeling bad for a while, since getting injured in a serious accident. My SSRI stopped working suddenly. Tried a SNRI and it was horrible for me. Nothing was working, and I felt like I was slowly dying. It felt like the life force was just ebbing away from me.
I got a methylation test(expensive ~$200/300). It showed that my body doesn't process folate or folic acid(a form of vit B12). It doesn't matter how much I take, my body just doesn't work well with it. In fact, taking it in the regular vitamin form is like a poison to my body. I was very deficient. My doctor prescribed "Deplin" which is categorized as a "medical food", but is prescribed for depression and schizophrenia. It has made a huge difference for me. I feel like I have energy again, and I am no longer dying. I have hope again.
Deplin is expensive and I have horrible insurance. I am going to try the prescription program on the drug home site and hopefully I can get it discounted to about $50/month.
I hope this helps at least someone. No I don't work for any methylation testing site. I just know I felt like my energy was slowly being drained from me. Turns out the proper form of vit. B12 for me, helps neurological/emotional/energy problems.