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The effects set in faster, requiring regular doses because of its extended half-life

Take 3-5 seconds to complete the injection rather than pushing quickly

Compare the all-in cost (product + shipping + handling) not just the headline price

[2] When used in supplementation, all of the vitamin B 12 vitamers have been argued to be beneficial, with there not being clear evidence that any are relatively more or less effective

You can return to work, workouts, or errands right away

Oral B12 supplements are absorbed at roughly 1 to 5% in healthy adults, and even less in people with low intrinsic factor, atrophic gastritis, or gut absorption issues