Why B12 shots fix tiredness and numbness
Clinical and Hematological Characteristics of Vitamin B12 Deficiency and Evaluation of the Therapeutic Response to Vitamin B12 Supplementation
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
66.7% of patients were male — despite B12 deficiency being stereotyped as a women’s/vegetarian issue
Most assume vegetarians or older women are most at risk — but this hospital study found over half were men, aged 46–60, with hypertension and diabetes.
Practical Takeaways
If you’re tired, numb, or have unexplained anemia, ask your doctor for a serum B12 test and MCV check.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
66.7% of patients were male — despite B12 deficiency being stereotyped as a women’s/vegetarian issue
Most assume vegetarians or older women are most at risk — but this hospital study found over half were men, aged 46–60, with hypertension and diabetes.
Practical Takeaways
If you’re tired, numb, or have unexplained anemia, ask your doctor for a serum B12 test and MCV check.
Publication
Journal
Cureus
Year
2024
Authors
A. Agrawal, Navin Mair, Rishi S Mehta, Arjun S Chakrapani, Kajal Gupta, Yash Srivastav, Gaurav Mittal
Related Content
Claims (5)
When people don’t have enough vitamin B12, their blood tends to have less hemoglobin — which means their blood can’t carry oxygen as well. The less B12 they have, the worse their anemia seems to be.
People with low vitamin B12 often feel super tired, and in one study, two out of three did. After getting weekly B12 shots for six weeks, most of them said their tiredness got way better.
If someone has low vitamin B12 and anemia, their red blood cells are unusually large and their blood doesn't carry enough oxygen. Giving them a weekly B12 shot for six weeks can fix this, making their blood cells normal size again and boosting their oxygen levels.
People with low vitamin B12 often feel tingling or numbness in their hands and feet, and when they get weekly B12 shots for six weeks, those weird sensations usually get much better.
When adults don’t have enough vitamin B12, their body makes fewer new red blood cells. But after getting weekly B12 shots for six weeks, their body starts making many more new red blood cells again, which shows their bone marrow is working better.