Vitamin B12 deficiency is common — especially in older adults — and the symptoms are often subtle at first, so they get ignored.
Vitamin B12 is essential for:
- Nerve function
- Red blood cell production
- DNA synthesis
The National Institutes of Health notes that deficiency can develop slowly and may cause irreversible nerve damage if untreated.
⚠️ Commonly Ignored Signs of Vitamin B12 Deficiency
1️⃣ Unusual Fatigue
Persistent tiredness, weakness, or feeling “wiped out” even after rest.
2️⃣ Tingling or Numbness
Pins-and-needles sensation in hands or feet.
This happens because B12 is crucial for nerve insulation (myelin).
3️⃣ Balance Problems
Unsteady walking or feeling off-balance.
4️⃣ Memory Issues or Brain Fog
Confusion, forgetfulness, trouble concentrating — sometimes mistaken for normal aging.
5️⃣ Pale or Slightly Yellowish Skin
B12 deficiency can cause a type of anemia.
6️⃣ Mood Changes
Low mood, irritability, anxiety, or depression.
7️⃣ Glossy or Sore Tongue
A smooth, red, tender tongue (glossitis).
👵 Who Is Most at Risk?
- Adults over 60
- Vegetarians or vegans
- People taking metformin
- People on long-term acid-reducing medications
- Those with digestive disorders (like Crohn’s or celiac disease)
The World Health Organization recognizes B12 deficiency as a significant global nutritional issue, especially in older populations.
🚨 Important
Nerve damage from prolonged deficiency can become permanent if not treated.
If someone suspects deficiency, a simple blood test can check B12 levels.
If you’d like, I can also explain which symptoms mean you should get tested soon rather than later.
