1. Nausea and vomiting
2. Diarrhea or constipation
3. Fatigue and weakness
4. Dizziness or lightheadedness
5. Numbness or tingling in the hands and feet
6. Difficulty sleeping
7. Mood changes, such as irritability or depression
8. Difficulty concentrating
9. Skin rash or itching
10. Shortness of breath or palpitations.
It's important to note that high levels of B12 are usually not harmful, as excess is typically excreted in the urine. However, in some cases, it may indicate an underlying health condition and should be monitored by a healthcare professional.
High blood levels of b12 symptoms
1 answer