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Bioavailability High most of the dose reaches your bloodstream, just more gradually than an IV

The injections work by forcing your body to absorb more vitamin B12, causing your body to release more serotonin, which makes you feel good

The dermal filler, often made from hyaluronic acid, is injected into the upper lip and other areas to achieve a fuller appearance

A lack of vitamin B12 can cause a variety of health issues, including fatigue and permanent neurological changes

While typically harmless and temporary, understanding why bruises form and how to prevent them can improve your comfort and confidence with weekly injections