I hope that I can get my point across. I came here looking for answers to my remaining symptoms, the main one being brain-fog. At 20% of what it used to be - most of the time but sometimes worse. I am C677T ++ and that mfolate 800 - 1000 mcg daily I had a big improvement with mB12 injections 1 mg daily with some B vitamins (I call it my morning "B" sting). Following what I am learning here I started Ad B12 and it didn't do much. So I added carnitine and crashed on the second day. I will split the carnitine caps and try again next weekend. In the meantime, I continued with the adB12. So, today I am in a 3 1/2 hour yawn-fest meeting - you know the type - where you mind wanders all over the place. It dawned on me that adB12 was helping with that - as in able to concentrate. BUT - only while I had a chip in my mouth. 10 min after it was gone and I was losing track again. This improved focus occurred in the presence of brain-fog. That is the strange part. If you had asked me I would have told you the fog was different (had a weird pressure in my head) but that I was fogged. This is why I didn't pick up on it outside of the meeting setting. So now what? I have taken about 15 mg of adB12 today. Do I always keep a chip in my mouth? I thought with adB12 that I would just knock back a few until there were no more (+) returns and then only once every few days (?) How much of this stuff can I take? Or should I take if I am on 1 mg inj mB12 daily? Finally, (and thank-you for getting this far) can I become cobalt toxic from too much B12 or is the sky the limit? Thanks in advance for any help or stories about your AdB12 experience.