My length of symptoms are relatively short - about 6 months total. Around Christmas time I started experiencing brain fog, fatigue and lack of appetite. I would be hungry, but have zero interest in eating food. I would occasionally experience shortness of breath, dizziness, coldness at my extremities. I experimented with various things including supplementing magnesium both oral and trans dermal and trying to heavily alkalize my diet and monitor my body PH. Then one day on a whim I bought a cheap b-complex at the grocery store. That night I took a b-complex and forced myself to eat some dinner. About 2 hours later I felt the best I'd felt in quite some time. I was able repeat this a few times and string together a few periods of feeling normal throughout the course of a week. I then started reading about B12 deficiency and learned about methyl B12. I bought some 1000mcg mb12 and took a couple per day. Started feeling great! I continued with my cheapo b12 complex + the mb12 for a few days. Eventually it quit working and my symptoms resumed. At that time I dug in, did some more reading and ordered (what I thought were) higher quality supplements. I bought Jarrow 5000 mb12 and Jarrow B-Right complex. I took both on a Friday and again felt great for 2-3 days. After that initial 2-3 days it's been pretty terrible. My biggest symptom seems to be fatigue. Brain fog, no motivation, nausea at times, and poor appetite as well. I work in IT and I literally sit at my desk and fall asleep sitting up while typing. Sometimes I just space out with my eyes open staring at the computer screen for long periods of time. I haven't had any muscle pain, soreness, spasms etc So I've dug in and done more reading which lead me to this site. I've read about the various protocols, potassium deficiency, etc. I've tried (what I feel to be) large amounts of potassium but I'm unsure if the fatigue I'm experiencing is caused by low potassium? I've been getting approx 3600mg of potassium daily via low sodium v8 + additional through my diet. I'm just so tired and I'm unsure what to do from here. 6 months ago I was totally healthy and fine. I thought maybe I had a problem with B vitamin deficiency and the vit B supplements I took did provide brief periods of dramatic improvement. However I worry that I've put myself down some odd path that I can't recover from now. It's been about 8 days of feeling terrible. I have three little boys to care for at home and I just don't have the energy to do it. If anyone has any suggestions on what I should try next I'm all ears. At this point I feel like I just need to get myself reset to a stable place where I can regroup and then perhaps start one of the protocol methods the right way rather than stumbling through it unknowingly like I've done. Here's everything I currently take: 2 x 125mg Magnesium maleate 3-4 TBSP Kava powder 1/2 Jarrow MB12 5000MG for approx 1hr in between lip and lower gum 1 Jarrow B-Right capsule. The newer kind with 5MTHF 1 5000IUI Vitamin D 1 50mg DHEA Many thanks to all on this site who contribute and make it what it is!