A B Complex will not give you an improved level of B12 - the amount in the tablet is too small. Continue with the B Complex and add Jarrow Methylcobalamin 1000mcg which you can chew and hold under the tongue. All the B's need to be in balance and in particular you need Folic Acid to work with and to hold onto the B12 in the body. You cannot overdose on B12 - as it will be excreted....
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