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B12, Vitamin D Deficiency & Fatigue
I am a 30-year-old male with persistent fatigue and low energy. My recent blood tests show Vitamin B12 <148 pg/mL and Vitamin D 11.8 ng/mL. Hb is 15.1 g/dL and CBC is otherwise normal. Thyroid, HbA1c, kidney function and most liver parameters are normal. I am vegetarian. Please advise on the appropriate treatment for these deficiencies, including whether oral B12 or injections are preferable, dosage and duration. Also, should I get any further tests to identify the cause of the severe B12 deficiency or investigate my fatigue? I can share the complete blood report.
Answers (6)
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Avoid fried and spicy food
Water intake more
Green leafy vegetables more
Fiber meal
Walk
Do connect and consult
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Your B12 and vitamin D levels are clearly deficient and can contribute to fatigue. If there are no neurological symptoms or absorption problems, oral B12 is often effective; injections are preferred for numbness, weakness, anemia, malabsorption, or poor response.
Vitamin D replacement should be taken in a clinician-guided doseâavoid prolonged high-dose self-medication.
Please review the complete CBC/MCV, ferritin, TSH and diet history to look for other causes of fatigue.
You may share the reports in a Practo consult or meet me at Synergy Multispeciality Hospital, Miraj.
Next Steps
Arrange an in-person evaluation with your complete reports; recheck B12 and vitamin D after treatment and return sooner for numbness, weakness, or worsening fatigue.
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Dr. Geetansh
General Physician
3 yrs exp
Meerut
Next Steps
You should start with oral vitamin B12 and Vitamin D
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Dr. Anuj Mothsra
General Practitioner
7 yrs exp
Jhunjhunu
Can help you, kindly consult and provide detailed history for proper diagnosis and further management
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Dr. Ankita Gahlot
Obstetrician
12 yrs exp
Bangalore
Both oral and injectable B12 are used for a deficiency this low, but which one, the dose, and how long depends on your full picture, not something to decide from a report alone.
Next Steps
Please see a physician in person, mainly since a B12 this low in a vegetarian diet sometimes needs a specific cause identified rather than just correcting the number.
Health Tips
Don't start a fixed dose or schedule yourself based on general information online.
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.