Ingredient 9 of 11
Vitamin B12 in Nerve Savior: What It Can and Cannot Tell You
Nerve Savior lists vitamin B12 as cyanocobalamin 1%, ninth in a 600 mg blend. Label math caps it at about 667 mcg, but no amount is printed. Low B12 can cause numbness and tingling, and metformin and acid reducers can lower it. A blood test, not a supplement label, tells you whether you are low.
Written by the Nerve Savior editorial teamUpdated
The basics
What is vitamin B12, and why is it in Nerve Savior?
Vitamin B12 is a B vitamin that helps keep the nervous system working. MedlinePlus says a shortage can cause anemia, loss of balance, and numbness or tingling in the arms and legs (MedlinePlus, Vitamin B12).
Nerve Savior's label lists "Vitamin B12 (as Cyanocobalamin 1%)". The NIH says cyanocobalamin is the most common form in supplements (ODS, Vitamin B12). The 1% most likely means the raw material is a powder that is 1% B12 by weight, mixed with a carrier.
| Label name | Vitamin B12 (as Cyanocobalamin 1%) |
|---|---|
| What it is | Cyanocobalamin · B vitamin |
| Position in the blend | 9 of 11 (labels list blend ingredients from most to least by weight) |
| Amount per capsule | Not disclosed; at most 66.7 mg of 1% material, about 667 mcg B12 |
| Amount used in research | RDA 2.4 mcg a day; no upper limit set |
| Strength of evidence | Essential vitamin |
| Why it is used | Vitamin whose shortage causes numbness and tingling |
| Main caution | Metformin and acid-reducing drugs can lower B12; ask your doctor for a blood test instead of guessing. |
Of the eleven ingredients, B12 has the most direct link to nerve symptoms. That link runs through deficiency, though, and only a test shows whether you have one.
Label math
How much vitamin B12 is in Nerve Savior?
The label does not say. B12 is ninth in the 600 mg proprietary blend, so its 1% material can weigh at most 600 divided by 9, about 66.7 mg. One percent of that is about 667 mcg of B12. The actual amount is unknown and may be much lower.
| Reference point | Amount a day | Note |
|---|---|---|
| Most the 1% powder could weigh | About 66.7 mg | 600 mg / 9 by label order |
| Most pure B12 that could hold | About 667 mcg | 1% of 66.7 mg |
| Adult RDA | 2.4 mcg | NIH Office of Dietary Supplements |
| Daily Value on labels | 2.4 mcg | FDA |
| Upper limit | None set | No UL has been established |
| Amount on the Nerve Savior label | Not published | Listed only inside the blend |
Because no upper limit exists for B12 (ODS, Vitamin B12), a high ceiling is less of a worry than it is for vitamin B6. The open question is the other end: whether there is enough to matter for someone who is low.
Nerves
Can low vitamin B12 cause numbness and tingling?
Yes. The NIH says B12 deficiency can cause numbness and tingling in the hands and feet, even when blood counts look normal and there is no anemia (ODS, Vitamin B12). NINDS lists B12 deficiency as one of the best-known vitamin-related causes of peripheral neuropathy (NINDS, Peripheral Neuropathy).
That is good news in one way. A cause that can be found can often be corrected, and NINDS notes that some neuropathy cases resolve when the cause is treated. But finding it takes a doctor and a lab, not a guess.
Tingling or numbness in the hands or feet, or loss of balance. These can come from low B12, diabetes or other causes (MedlinePlus, Peripheral Nerve Disorders), and the treatment depends on which one it is.
Medicines
Can metformin or acid reducers lower vitamin B12?
Yes. The NIH says metformin and acid-reducing drugs can lower how much B12 your body absorbs (ODS, Vitamin B12). That includes proton pump inhibitors (PPIs) such as omeprazole and H2 blockers.
Metformin
A widely used diabetes medicine. The NIH says it can lower B12 absorption.
PPIs
Proton pump inhibitors, such as omeprazole, cut stomach acid and can reduce B12 absorption.
H2 blockers
Another class of acid reducers that the NIH lists as lowering B12 absorption.
People on metformin face two overlapping risks. Diabetes itself is the leading cause of nerve damage, and one-third to one-half of people with diabetes have peripheral neuropathy (NIDDK, Diabetic Neuropathies). Our article on B12, metformin and tingling feet explains how the two can blur together.
What to do
How do I find out if I am low in B12?
Ask for a blood test
Tell your doctor about any tingling, and ask whether a B12 test makes sense for you.
Mention your medicines
Say if you take metformin, a PPI or an H2 blocker. Bring your supplements, Nerve Savior included.
Follow the result
If you are low, your doctor sets the dose and form. A blend with no printed amount cannot do that.
Labeling
Why doesn't Nerve Savior list its B12 amount?
The label gives no reason. B12 has a Daily Value of 2.4 mcg (FDA, Daily Values). FDA's guide wants such nutrients shown on their own lines: they "must be listed separately and the individual weights declared" (FDA, Labeling Guide Ch. IV).
On the Nerve Savior panel, B12 sits inside the blend with no weight and no percent of Daily Value. We report that as an observation, not a legal judgment. The same is true of B6.
For a buyer, it means you cannot count on Nerve Savior to replace a B12 product your doctor prescribed. See the full panel on the Nerve Savior Supplement Facts page.
Safety
Is the B12 in Nerve Savior safe, and who should ask a doctor?
No upper limit has been set for B12 (ODS, Vitamin B12). The caution is about what a blend can miss, not about harm from the vitamin.
- If you take metformin, a PPI or an H2 blocker: ask for a B12 test rather than guessing with a blend.
- If your doctor already treats you for low B12: keep your prescribed plan. Do not swap it for Nerve Savior.
- If you have new numbness or tingling: get checked first, because the cause decides the treatment (NINDS, Peripheral Neuropathy).
- If you are pregnant, nursing, under 18 or have a known condition: the label tells you to consult a physician.
The rest of the blend has its own cautions, including B6, ginkgo and green tea extract. See the Nerve Savior side effects page.
Verdict
Our honest verdict on vitamin B12 in Nerve Savior
B12 is the most sensible ingredient in Nerve Savior for nerve health, because a shortage really does cause tingling. Its value depends on two things the label leaves out: how much is in each serving, and whether you are low to begin with. A blood test answers the second question. Only the maker can answer the first.
Fair points
- Directly tied to nerve health
- Common, named form (cyanocobalamin)
- No upper limit set
Weak spots
- No amount printed despite a Daily Value
- Up to about 667 mcg, possibly far less
- No substitute for testing and treatment
FAQ
Vitamin B12 in Nerve Savior: common questions
How many mcg of vitamin B12 are in Nerve Savior?
The label prints no amount. B12 is ninth in a 600 mg blend as cyanocobalamin 1%, so label math caps it at about 66.7 mg of material, or roughly 667 mcg of B12. The true amount may be far lower.
Should people on metformin rely on Nerve Savior for B12?
No. Metformin can lower B12 absorption (ODS, Vitamin B12), so ask your doctor for a blood test instead of relying on a blend with no printed B12 amount. Your doctor can also check whether other parts of the formula, such as cinnamon, suit you.
Does low B12 cause tingling in the feet?
Yes. The NIH says B12 deficiency can cause numbness and tingling in the hands and feet, even without anemia (ODS, Vitamin B12). Diabetes and other conditions cause the same symptoms, so a doctor should test you before you treat it yourself.
Do PPIs like omeprazole lower vitamin B12?
They can. The NIH lists proton pump inhibitors such as omeprazole, along with H2 blockers, as drugs that can reduce B12 absorption. If you take one long-term and have tingling, ask your doctor about a B12 blood test.
Can you take too much vitamin B12?
No upper limit has been set for B12, according to the NIH (ODS, Vitamin B12). That makes Nerve Savior's B12 ceiling of about 667 mcg less of a concern than its B6. Still, tell your doctor about every supplement you take.
Is cyanocobalamin a good form of B12?
It is the most common form in supplements, the NIH says. Nerve Savior uses cyanocobalamin at 1% strength. The bigger issue is not the form but the missing amount, which makes it hard to know what you are getting.
Is a B12 blood test a good idea before Nerve Savior?
It is a good idea if you have tingling, take metformin or acid reducers, or have balance problems. A test shows whether you are low and how low. That guides treatment far better than a supplement with no printed B12 amount.
Who wrote this
Written and reviewed by
Plain-language pages built from the bottle label, the order page and linked public health sources such as NIH, FDA and CDC.
Last updated . Read our editorial standards and the way we check reviews. This website is run by a U.S. retailer for Nerve Savior, not by the manufacturer. We get paid when you buy through our order links.
Keep reading
More about Nerve Savior
B12, metformin and tingling feet
Why metformin and acid reducers can lower B12, what tingling feet may mean, and which test to ask for.
Read more
Nerve health guide
What nerves do, why feet tingle, which signs need a doctor now, and where a supplement fits.
Read moreVitamin B6
Needed for nerves, harmful in excess: B6 could reach about 86 mg a day, and the label prints no amount.
Read moreUSA Authorized Nerve Savior Retailer
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