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Methylcobalamin is felt to be superior to cyanocobalamin because it does not require methylation for activation in the body
Vitamin B12 metabolism and massive-dose methyl vitamin B12 therapy in Japanese patients with multiple sclerosis
Each needle insertion introduces potential bacteria, and without benzyl alcohol, nothing stops them from multiplying
Both treatments
B12 deficiency is a common problem for people who follow vegetarian or vegan diets, and absorption can be unpredictable
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