vitamin b12 liquid for injection HoneyCombs Drops, Cyanocobalamin, 1 Fl Oz 12 Injection is indicated for the prevention and treatment of vitamin B Compounded Cyanocobalamin (Vitamin B12) Injection

Antioxidant protection

If your B12 levels are already normal, injecting more B12 will not accelerate your metabolism, increase your energy, or cause fat loss

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A slight backward tilt is sufficient

The result is a significant boost in energy levels and overall well-being

Even if you can absorb B12 but have a deficiency caused by diet, a short course of injections would be the best way to bring levels up quickly, so I imagine that's why you were given it rather than tablets