There is enough info here about B12 to make your head spin and I read through as much as I can, but bottom line, can anyone tell me what you are taking and why? I had a hard time with methylcobalmin at first but finally slowly increased to about 600 mcg. in liquid form. My multi has 50 mcg methyl and adenosylcobalmin mixed. Doc says that's plenty. My B12 serum and folate serum were normal. I'm taking NAC, lithium orotate 5 mg, and Vitamin D3 5000 IU a day as well. (my serum D was a bit high but doc says stay on it) I can't find adenosylcobalmin by itself and I know sublingual and liquid forms are best. Some of my snps are: BHMT 08 +/+ CBS 360 and 13637 +/- COMT rs6269 +/- and COMTH62H +/- and COMTV158M +/- and MAO A +/+ among other polymorphisms like MTHFR 1298 and 677 compound heterozygous VDR bsm and VDR taq both +/- Does anyone have similar snps as I do and anxiety/panic attack/digestion/gut bloating issues/food sensitivities/reflux/LPR symptoms as well? What are you taking for B12 and any advice for me?