Vitamin B12 Deficiency: Key Symptoms to Watch For

Vitamin B12, or cobalamin, is vital for red blood cell production, nerve function, and DNA synthesis. A deficiency can develop slowly and lead to serious health problems if untreated. Here are the main signs to watch for:

1. Fatigue and Weakness – Caused by reduced oxygen delivery due to fewer red blood cells.
2. Pale or Yellow Skin – From red blood cell breakdown and increased bilirubin.
3. Shortness of Breath and Dizziness – Low oxygen levels can lead to these symptoms, especially with exertion.
4. Tingling in Hands and Feet – Nerve damage from B12 deficiency can cause numbness or “pins and needles.”