I have these symptoms after 2 hours or less of taking 5mg MB12 while at work ( physical job). This has been like this ever since starting it. taking potassium wont help it but only more MB12 will. It will stretch a little furthur when at home, but still remains a problem. Symptoms include slowly increasing malaise, decreasing coordination with hands, and similiar. After six hours this becomes confusion and stiffness. At ten- twelve hours it becomes extremely bad and I dont want to move without extreme stiffness of ALL muscles. What is going on here exactly? After Twelve hours without supplementing I got a homocysteine/ methylmalonic test and got: HOMOCYSTEINE 21.2 HIGH <11.4 umol/L 01 METHYLMALONIC ACID, GC/MS/MS METHYLMALONIC ACID, GC/MS/MS 142 87-318 nmol/L METHYLMALONIC ACID, GC/MS/MS, URINE METHYLMALONIC ACID, GC/MS/MS, URINE0.9 0.3-1.9 mmol/mol creat CREATININE, RANDOM URINE 5.432.38-26.55 mmol/L I began takign metlyfolate too lately to help the homocysteine level. B12 symptoms retun roughly the same way after 1.5-two hours. Any help would be nice thanks!