1. 😴 Constant tiredness or weakness
Feeling unusually tired, weak, or lacking energy can occur when B12 deficiency causes anemia.
2. 🫳 Tingling or numbness
Pins and needles, burning, or numbness in the hands and feet can be an important neurological sign. These symptoms can occur even when anemia is absent.
3. ⚖️ Balance or walking problems
B12 deficiency can affect the nervous system and may lead to difficulty walking, poor coordination, or balance problems.
4. 🧠 Memory or concentration problems
Difficulty concentrating, forgetfulness, confusion, or other cognitive changes can occur with B12 deficiency.
5. 😔 Mood changes
Depression, irritability, or other changes in mood can sometimes be associated with B12 deficiency.
6. 👅 A sore or unusually smooth tongue
A painful, red, or smooth tongue—known as glossitis—can occur with B12 deficiency. Mouth soreness can also develop.
7. 🥴 Dizziness or headaches
B12-deficiency anemia can cause symptoms such as dizziness, headaches, and shortness of breath.
8. 💓 Heart palpitations
A deficiency that leads to anemia may cause a noticeable or unusually rapid heartbeat.
9. 👁️ Vision changes
In some cases, B12 deficiency can affect the optic nerves and cause visual problems. New or unexplained vision changes should always be medically evaluated.
10. ⚖️ Unexplained weight or appetite changes
Loss of appetite and weight loss can occur with B12 deficiency, although these symptoms have many other possible causes.
Who Is More at Risk?
B12 deficiency isn’t only a problem for people who don’t eat meat. Risk can increase with a strict vegan diet, problems absorbing B12, certain gastrointestinal conditions or surgeries, pernicious anemia, and prolonged use of some medicines such as metformin or proton-pump inhibitors.
