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Vitamin B12 induced acneiform eruption

[12] However, any time you receive an injection, theres a very small risk of infection or allergic reaction

Hormonal medications (e.g., birth control pills, thyroid hormone) for contraception or hormone replacement, etc

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

Detrimental skin changes also play an important role in facial aging

After about a week, the injections make your lip look fuller or poutier without adding any volume to your lip