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Vitamin B12 is unusual among the vitamins: the people most likely to be short of it often have no idea, and the symptoms are vague enough to be put down to everything else going on. It is also one of the few deficiencies where a cheap test gives a clear answer.
What B12 does
B12 contributes to normal red blood cell formation, normal functioning of the nervous system, normal homocysteine metabolism, normal energy-yielding metabolism, and the reduction of tiredness and fatigue. Those are the established claims, and the tiredness one is why it has a reputation as an energy vitamin.
That reputation needs a caveat. B12 reduces tiredness if you are short of it. If your levels are already fine, taking more will not give you extra energy, and anyone selling it on that basis is overpromising.
Who is actually at risk
B12 occurs naturally only in animal foods. The groups most likely to run low are:
- Vegetarians and vegans. A vegetarian diet with dairy supplies some; a vegan diet supplies essentially none without fortified foods or a supplement. This matters in Pakistan, where a largely vegetarian diet is common in some communities.
- Anyone over sixty. Stomach acid production declines with age, and B12 needs acid to be released from food.
- Anyone on long-term metformin. It is well documented that metformin reduces B12 absorption over time, and this is worth raising with your doctor.
- Anyone on long-term acid-reducing medication such as omeprazole, for the same reason as above.
- People with coeliac disease, Crohn's, or who have had stomach or bowel surgery, where absorption is affected directly.
Why the symptoms are easy to miss
Early signs are unremarkable: tiredness, breathlessness on stairs, a pale appearance, mouth ulcers, a sore tongue. Later ones are more specific and more serious: pins and needles, numbness in the hands or feet, unsteadiness, memory and concentration problems.
The nerve symptoms are the reason not to self-diagnose for long. Nerve damage from prolonged B12 deficiency can become permanent, which is not true of most supplement situations. If you have numbness or tingling, see a doctor rather than buying a bottle.
Test, do not guess
A serum B12 test is inexpensive and widely available in Pakistan. It is worth doing before starting, for two reasons. It tells you whether B12 is actually your problem, and it gives you a baseline.
There is a second, less obvious reason to test first. B12 supplementation can correct the anaemia caused by folate deficiency while leaving the underlying nerve damage to progress, which is why the two are usually looked at together rather than one being taken blindly.
Tablets, drops or injections
Most people absorb oral B12 perfectly well, including many who are mildly deficient, because a small percentage is absorbed by passive diffusion regardless of stomach acid. That is why oral doses are deliberately far higher than the daily requirement. Our Vitamin B12 1000mcg tablets work on that basis.
Injections are a medical decision, usually for pernicious anaemia, where the body lacks the intrinsic factor needed to absorb B12 at all, or where symptoms are severe. That is a conversation with a doctor, not a pharmacy counter.
B12 is water-soluble, so excess is passed out rather than stored, which is why it has a good safety record. It is also why bright yellow urine after taking a B-complex is normal and nothing to worry about: that is riboflavin, not a sign that the dose was wasted.
Where it fits with the rest
B12 rarely travels alone. It works alongside folate in the same metabolic pathway, which is why B-complex formulas pair them, and why our HP API Syrup includes the B group together rather than one in isolation. If tiredness is the thing you are trying to solve, iron, thyroid function and vitamin D are all worth checking at the same time, since they produce much the same symptoms.
Who should check with a doctor first
- Anyone with numbness, tingling or unsteadiness.
- Anyone already diagnosed with anaemia, so that the cause is established first.
- Anyone on metformin or long-term acid-reducing medication, to have levels checked properly.
- Anyone pregnant or breastfeeding.
Our note on eight checks before buying a supplement covers how to compare doses across brands.
This article is general information from the Orbit Naturals formulation team, not medical advice. Our supplements are food supplements, not medicines, and are not intended to diagnose, treat, cure or prevent any disease.
