Thanks for your question â itâs a very important one for maintaining long-term energy, cognitive health, and overall well-being. As a dietitian, Iâll guide you based on current evidence and clinical nutrition practice.
𧪠Your Lab Values: What They Mean
Hemoglobin (Hb): 13 g/dL â This is normal for most adults. No anemia based on Hb.
Vitamin B12: 162 pg/mL â This is low. Most labs consider:
300 pg/mL = Adequate
ð Even if your hemoglobin is normal, a B12 level this low can lead to fatigue, brain fog, numbness/tingling, and long-term nerve damage if not corrected.
ð How Much B12 Should You Take?
Because your B12 is deficient, a therapeutic dose is needed first, followed by a maintenance dose.
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Recommended Plan:
ð¹ Correction Phase:
Dosage: 1,500 mcg of methylcobalamin (oral) daily
Duration: At least 4â6 weeks
This high oral dose is safe because excess B12 is water-soluble and excreted in urine.
Alternatively (if advised by your doctor):
Injections (e.g., 1,000 mcg intramuscular weekly for 4â6 weeks) are also effective, especially if there's poor gut absorption.
ð¹ Maintenance Phase (after levels normalize):
Once your B12 reaches a healthy level (usually >400â500 pg/mL):
Dosage: 500 mcg daily or 1,000 mcg 2â3 times per week
Monitor levels every 6â12 months to ensure stability
ð½ï¸ Nutrition Advice from a Dietitian:
In addition to supplements, increase intake of B12-rich foods, especially if you're vegetarian or vegan (as B12 is mostly found in animal products):
Eggs
Dairy (milk, yogurt, cheese)
Fish (sardines, tuna, salmon)
Chicken, beef,
liver
Fortified plant milks and cereals (check the label)