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There are some groups who may benefit from or need to supplement due to a B12 deficiency

Injections are more effective for those with absorption issues or severe deficiency, but oral supplements work well for most people with mild deficiency and normal absorption

Vitamin B helps your body convert food into energy

Because a B12 injection bypasses all potential barriers to absorption, it can help reverse deficiency symptoms relatively fast

It contains methylcobalamin (vitamin B12), pyridoxine (vitamin B6), and nicotinamide, which help relieve symptoms such as numbness, tingling, weakness, fatigue, and nerve pain associated with vitamin B deficiency

Among the alternatives to prevent vitamin B12 deficiency are: oral supplements, B12 injections, and sublingual pills