Ingredient 9 of 11
Vitamin B12 in PureLung: Ninth of 11, as Cyanocobalamin 1%
Vitamin B12 (as cyanocobalamin 1%) is the ninth name in the PureLung blend, so it can weigh at most 66.7 mg per serving of 2 capsules, with no amount printed. The NIH lists the adult need as 2.4 mcg a day and sets no upper level. Acid-reducing medicines and metformin can lower B12 absorption. No lung evidence was found.
Written by the PureLung label deskUpdated
What it is01
What is vitamin B12?
Vitamin B12 helps the body make red blood cells and keep nerves working. It is found in meat, fish, eggs and dairy, and in fortified foods. The label lists it "as Cyanocobalamin 1%", the most common supplement form.
The NIH fact sheet says the adult recommended intake is 2.4 micrograms a day, that cyanocobalamin is the most common supplement form, and that no upper level is set because of low toxicity (NIH ODS, Vitamin B12). The "1%" on the label is not explained. In some products it shows a diluted mix with a carrier, so the vitamin itself may be a small share of the listed weight.
On the label02
What does the PureLung label show for it?
It is the ninth of eleven names in the blend, with no amount printed. By weight order it weighs at most 600 divided by 9, about 66.7 mg (FDA, Q&A on Dietary Supplements).
| Name on the label | Vitamin B12 (as Cyanocobalamin 1%) |
|---|---|
| What it is | vitamin |
| Place in the list | 9 of 11 in the Proprietary Blend (heaviest name first) |
| Amount | inside the 600 mg blend; no separate amount printed |
| Most it could weigh | 66.7 mg per serving of 2 capsules |
| Usually sold for | Needed in small amounts for blood and nerves |
| Lung benefit in a trial of this capsule | None. No study of PureLung found |
| Main caution | Acid-reducing medicines and metformin can lower B12 absorption; your clinician may check your level. |
If the 1% means a diluted mix, then even 66.7 mg of the mix would hold less than 1 mg of the vitamin, which is still many times the daily need of 2.4 mcg. That is a thought experiment, since the real weight is unknown. The point is that the label gives no figure that a person on a B12 plan could use.
Lung evidence03
Is there evidence for B12 and the lungs?
No. The NIH fact sheet covers anemia, nerves, pregnancy and age, and does not give a lung benefit for B12 supplements (NIH ODS, Vitamin B12). We found no trial of B12 for asthma, COPD or lung function.
B12 matters if you are low. Low B12 is more common in older adults, vegans and people with some stomach or gut conditions. A blood test can show it, and a clinician can treat it. Taking B12 when your level is normal has not been shown to help the lungs.
Medicines04
Which medicines change B12?
The NIH notes that acid-reducing medicines, such as proton pump inhibitors and H2 blockers, and metformin can lower B12 absorption (NIH ODS, Vitamin B12). People who take them for a long time may need a check. If you use them, tell your clinician you take a B12 supplement, so that a blood test is read in the right light.
The reverse also matters. If you take B12 and have a test, a high level may reflect the supplement. Bring the label to the visit and say how long you have taken it.
| Item | Fact |
|---|---|
| Position on the label | 9 of 11 |
| Most it could weigh | 66.7 mg |
| Printed amount | None; shows cyanocobalamin 1% |
| Adult need | 2.4 mcg a day (NIH ODS, Vitamin B12) |
| Lung evidence | None found |
| Main caution | Acid reducers and metformin lower absorption |
Who needs it05
Who might need B12?
Older adults, strict vegans and vegetarians, people with pernicious anemia, people who have had stomach or bowel surgery and people on long-term acid reducers or metformin. If you fit, ask a clinician about testing. If your level is low, a product with a clear amount is easier to manage than a blend.
For most adults who eat meat, fish, eggs or dairy, food covers the need. A capsule blend with an unknown amount does not replace a plan built with a clinician.
PureLung: 60 capsules a bottlePacks of 1, 3 or 6 bottles · live price shown at checkout · guarantee as printed on the live listing
See packsQuestions06
What should you ask?
Ask the order desk how much B12 is in a serving and what 1% means. Ask a pharmacist about your acid reducer or metformin. Tell your clinician before any B12 blood test. And see the vitamin B6 page for the other vitamin in the blend.
Why it is everywhere07
Why do so many supplements include B12?
It is cheap, it is safe at common amounts, and it has a good reputation for energy. A label with B12 looks complete. The NIH notes that B12 is needed for red blood cells and nerves and that low levels cause fatigue and other problems in people who are deficient (NIH ODS, Vitamin B12). In people who are not deficient, extra B12 has not been shown to raise energy or to help the lungs. So a B12 name on a label can be reassuring and still not mean anything for the claim on the front.
Tracking08
What does a blend do to B12 tracking?
If your clinician checks your B12 level, they will want to know what you take. A blend with no printed B12 amount makes that hard. You can bring the bottle, the name and the 1% mark, and ask for a sense of scale. If B12 matters for you, because of an acid reducer, metformin, vegetarian diet or age, use a product with a printed amount, and let the blood test guide you.
Diet09
What if you are vegan or vegetarian?
B12 is made by microbes and found mainly in animal foods and fortified foods, so strict vegans need a reliable source, such as a fortified food or a supplement with a printed amount. A blend with no figure is a poor tool for that job. Ask a dietitian or clinician, who can check your level and suggest a product you can count on.
FAQ10
PureLung questions people ask
Why is vitamin B12 in a lung supplement?
The label does not say. No lung benefit is given in the NIH fact sheet.
How much B12 is in PureLung?
Not printed. It could weigh at most 66.7 mg of the 1% mix per serving.
What does cyanocobalamin 1% mean?
The label does not say. It likely shows a diluted mix.
Is too much B12 harmful?
No upper level is set because of low toxicity (NIH ODS, Vitamin B12).
Do acid reducers affect B12?
Yes, they can lower absorption (NIH ODS, Vitamin B12).
Does B12 help asthma or COPD?
We found no evidence it does.
Should I get a B12 blood test?
Ask a clinician if you are at risk of low B12.
Who wrote this11
Written and reviewed by
Pages built from the label images, seller information and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a U.S. authorized retailer for PureLung. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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