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However, in patients with pernicious anaemia or malabsorption, these stores cannot be replenished through diet, making regular injections essential

Here is what you can generally expect after your first injection, from the early hours to the longer-term changes that take more time to show up

We had discussed it a few visits prior

Foods like meat, fish and dairy are the best source for B-12, but it can be created synthetically in a lab for supplements

That conversion step can slow absorption, especially in people with certain metabolic conditions

But these high doses are necessary to help treat people with a deficiency