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This material is a laboratory reference standard supplied strictly for in vitro and preclinical research

On the physical side, you might notice constant tiredness that doesn't improve with rest, heavy legs during workouts, shortness of breath on efforts that shouldn't wind you, pale skin, and a need for frequent napping

For the mood and cognitive side of this, see our guides on B12 for brain health and B12 for mood and anxiety.

The body does not store vitamin B12, so its important to get enough through diet or supplements

Hydroxocobalamin is vitamin B-12s natural form produced by a microorganism and found in foods