Vitamin B12, also known as cobalamin, plays an essential role in the production of your red blood cells and DNA, as well as the proper functioning of your nervous system.

Unfortunately, B12 deficiency is common, so in this video we're looking at who's at risk and the main signs of deficiency.

Further reading: https://www.healthline.com/nutrition/...

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Studies mentioned:

STUDY 1: https://www.ncbi.nlm.nih.gov/pubmed/1...
STUDY 2: https://www.ncbi.nlm.nih.gov/pubmed/1...
STUDY 3: https://www.ncbi.nlm.nih.gov/pubmed/2...