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Vitamin B12 induced acneiform eruption

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Intrauterine growth retardation and consequences for endocrine and cardiovascular diseases in adult life: Does insulin-like growth factor-I play a role
If you have a temporary deficiency or increased requirement (say, after a surgery or during recovery from an acute illness), you might only need a short course, perhaps a few weeks of injections, until your vitamin levels normalize or you can meet your needs by mouth again
