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In one such case, a 71-year-old man was diagnosed with severe B12 deficiency due to pernicious anemia

According to the NIH Office of Dietary Supplements, B12 plays a key role in: Making red blood cells and preventing megaloblastic anemia Maintaining healthy nerve function and the myelin sheath that protects nerves DNA synthesis Supporting brain function and preventing cognitive decline Converting food into energy (cellular metabolism) Because B12 is found almost exclusively in animal products meat, fish, dairy, and eggs certain groups of people are at much higher risk of deficiency than others

The clinical evidence gap between these two compounds is enormous

That conceptual shift may be as valuable as the compound itself