Is a vitamin B12 test twice the normal result dangerous?

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Let me ask, I tested for vitamin B12. Results 1749 pg/ml. Twice as high as normal even though I have never supplemented with B12 before. Please ask the doctor, is it dangerous to have a vitamin B12 test result that is twice as high as normal? Thank you doctor for helping me.
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Hello! Vitamin B12 belongs to the B vitamins. They are necessary for the normal formation of red blood cells, the repair of tissues and cells, and the synthesis of DNA which is the genetic material in cells.
Healthy adult serum vitamin B12 level: 220-925 pg/mL or 162-683 pmol/L. Elevated levels of vitamin B12 are rare and are often not monitored clinically. However, if a patient has a condition such as chronic myeloproliferative neoplasm, diabetes, heart failure, obesity, AIDS, severe liver disease, then he or she may have high levels of vitamin B12. increase. Taking estrogen, vitamin C, or vitamin A can also cause high vitamin B12 levels.
You should go for a general examination and do other specialized tests so that the clinician can give you more specific advice. You can also make an examination at a hospital of Vinmec Health System.
Thank you for trusting and sharing the question "Is the vitamin B12 test twice the normal dangerous?" to Vinmec. We hope to see you soon to discuss further. Wishing you good health always.
Consulted by Master, Doctor Do Thi Hoang Ha - Doctor of Biochemistry - Laboratory Department - Vinmec Hai Phong International General Hospital