Brief Answer: You need not to worry. Detailed Answer: Hello, Thanks for your query. You had read correct that high B12 can be associated with leukemias/liver disease and consumption of cobalamin containing foods or supplements do not increase plasma Cobalamin levels substantially. You need not to worry as your CBC and liver tests were well within normal ranges. Benign fasciculation syndrome occurs due to nerve hyperactivity and if uncomfortable can be treated with medications which calm the nerves such as gabapentin or pregabalin. Discuss these with your neurologist. I do hope that you have found something helpful and I will be glad to answer any further query. Take care

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