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However, other studies haven't seen a link between low levels of B12 and cognitive problems or an improvement in these symptoms after getting extra doses of B12
However, as is the case with any supplement or injection, the results are going to vary for each person
[137] Laboratory [edit] The complete laboratory synthesis of B 12 was achieved by Robert Burns Woodward [138] and Albert Eschenmoser in 1972
Precautions for Cyanocobalamin General Precautions Vitamin B 12 deficiency that is allowed to progress for longer than 3 months may produce permanent degenerative lesions of the spinal cord
Avoid removing and reinserting the needle into the vial multiple times, as this can dull the needle
