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Signs that youre not getting enough B12: Fatigue Weakness Confusion Memory issues Headaches Depression Pale skin Pain and swelling in the mouth or tongue Erectile dysfunction Vitamin B12 Benefits B12 is linked to several important functions in the body, including: Red blood cell formation Your body needs B12 to produce healthy red blood cells

Laboratory factors such as macro-B12 (immunoglobulin-bound B12) can cause spurious elevation on some assays

Roles of Nicotinamide N-Methyltransferase in Obesity and Type 2 Diabetes

This is a single rabbit study, not human evidence

When the body cant properly absorb B12 from food or supplements, symptoms like fatigue, brain fog, and low mood can develop