What is the appropriate dose of Vitamin B12 for my levels? - #28624
I was wondering if you could assist on which dose of Vitamin B12 should I intake of Solgar brand there is 500 and 1000 mcg methylcobalamin. I have lab results vitamin B12 186, Vitamin D 10.4, HgB 136. Can I use Iron supplements along with B12 after 3 hours?
How long have you been tracking your vitamin B12 levels?:
- 3-6 monthsAre you currently experiencing any symptoms related to low vitamin B12?:
- FatigueHave you taken any vitamin B12 or iron supplements before?:
- No, never100% Anonymously
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Doctors' responses
Your lab values show that your vitamin B12 level (186 pg/mL) is low, and your vitamin D (10.4 ng/mL) is also deficient, while your hemoglobin (136 g/L) is within the normal range. Low B12 can explain symptoms like fatigue and low energy, and it should be corrected properly. For treatment, both 500 mcg and 1000 mcg methylcobalamin are safe, but in your case, 1000 mcg daily is usually preferred initially to replenish stores more effectively, especially when levels are clearly low. This falls under Vitamin B12 Deficiency. You can take the supplement once daily (preferably in the morning), and improvement is usually seen within a few weeks, though full correction may take a few months.
Regarding iron, yes—you can take iron supplements along with B12, and spacing them by 2–3 hours is perfectly fine (and sometimes better for absorption and to reduce stomach upset). Even though your hemoglobin is normal, iron may still be needed if your doctor suspects low iron stores, but ideally this should be confirmed with tests like ferritin.Also, your vitamin D deficiency should not be ignored, as it can contribute to fatigue and weakness, and typically requires higher-dose supplementation (as advised by a doctor).
Conclusion: Your results indicate vitamin B12 deficiency, so taking 1000 mcg methylcobalamin daily is appropriate, and you can safely take iron supplements a few hours apart; however, you should also address your vitamin D deficiency and consider follow-up testing to monitor improvement.
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