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13-15 Although the precise molecular mechanisms underlying methylcobalamin-mediated myelination are unknown, a number of models have been suggested, including increased synthesis of lecithin (the primary component of myelin sheath lipids) 16,17

Uhl et al

They sent me the injector to suit the 1mil syringes but, they were bigger in diameter than the ones I currently had, the problem being, I could no longer use my 1 mil syringes as they were much thinner & wouldn't fit the auto injector