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Vitamin B12 and Neuropathy: Can Low B12 Cause Numbness and Tingling?
Vitamin B12 neuropathy is nerve trouble linked to low B12, and numbness and tingling in the hands and feet can occur with it, even without anemia. The adult RDA is 2.4 mcg. Metformin and acid-reducing drugs can lower B12 levels. Nervecept capsules list 8 lines (699 mg) and no vitamin B12.
Written by the Nervecept label deskUpdated
The basics01
Can low vitamin B12 cause numbness and tingling?
Yes, low vitamin B12 can cause numbness and tingling in the hands and feet, and it can happen without anemia (NIH ODS, Vitamin B12).
That last point matters. A B12 problem can exist even with a normal blood count. Only a B12 test can show your level.
NINDS lists B12 deficiency, and also too much vitamin B6, among the vitamin problems linked to peripheral neuropathy (NINDS, Peripheral Neuropathy). MedlinePlus and Mayo Clinic add low B1 and B6, copper and vitamin E (MedlinePlus, Peripheral Neuropathy) (Mayo Clinic, Peripheral Neuropathy).
The fix depends on the cause. If low B12 is the cause, your doctor can pick the right form and dose. A random product is a guess.
Key numbers02
How much vitamin B12 do adults need?
Adults need 2.4 mcg of vitamin B12 a day, which is the Recommended Dietary Allowance set by the NIH Office of Dietary Supplements (NIH ODS, Vitamin B12).
That is a very small amount. A mcg is a millionth of a gram. For scale, one Nervecept capsule lists 699 milligrams across its eight lines, and none of them is B12.
| Adult RDA | 2.4 mcg a day (NIH ODS, Vitamin B12) |
|---|---|
| Nerve signs of low B12 | Numbness and tingling in hands and feet, possible without anemia (NIH ODS, Vitamin B12) |
| Drugs that can lower it | Metformin; acid reducers such as proton pump inhibitors and H2 blockers (NIH ODS, Vitamin B12) |
| In Nervecept? | No. The eight label lines are glucosamine sulfate, frankincense, chondroitin sulfate, turmeric, quercetin, methionine, MSM and bromelain |
Who is at risk03
Can metformin or acid reducers lower vitamin B12?
Yes, metformin might reduce B12 absorption and may significantly lower serum B12. Acid-reducing drugs can also reduce B12 absorption from food (NIH ODS, Vitamin B12).
The drugs named are proton pump inhibitors and H2 blockers (NIH ODS, Vitamin B12). Many people with diabetes take metformin. That overlap is one reason diabetes and low B12 can show up together in the same person.
If you take metformin
Ask your doctor whether a B12 check fits your care. Do not stop metformin on your own.
If you take an acid reducer
Mention it when you ask for a B12 test. Keep taking it unless your doctor says otherwise.
We found no source in our list that names other risk groups, so we leave them out rather than guess. Your doctor can tell you if you belong to one.
Diabetes04
Is there a diabetic neuropathy supplement that works?
No supplement has a clear record for diabetic neuropathy. NCCIH says that for most supplements there is no evidence of benefit for diabetes or its complications (NCCIH, Diabetes and Dietary Supplements).
The one it covers for neuropathy is alpha-lipoic acid. A 2022 review of 8 studies was inconsistent: 3 reported symptom improvement and 5 did not (NCCIH, Diabetes and Dietary Supplements). Alpha-lipoic acid is not in Nervecept.
NCCIH says not to replace medical diabetes treatment with an unproven product (NCCIH, Diabetes and Dietary Supplements). The proven steps are blood sugar control, daily foot checks and regular exams (CDC, Diabetes and Nerve Damage). Diabetic neuropathy may affect up to half of people with diabetes and is often preventable (Mayo Clinic, Diabetic Neuropathy).
See the foot care basics for the daily routine.
Nervecept: from $49 a bottle30 capsules · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsOther causes05
Is low B12 the only vitamin problem that affects nerves?
No, low B12 is one of several nutrient problems linked to nerve trouble, and nutrients are only one group of causes.
Diabetes is the leading cause of neuropathy in the U.S. (NINDS, Peripheral Neuropathy). Autoimmune disease, kidney or liver disorders, an underactive thyroid, infections, alcohol and some medicines are also named (MedlinePlus, Peripheral Neuropathy) (Mayo Clinic, Peripheral Neuropathy). Often no cause is found (MedlinePlus, Peripheral Neuropathy).
That is why one blood test is rarely the whole story. A doctor looks at the full picture, then decides which tests to order.
| Cause | What helps first |
|---|---|
| Diabetes | Blood sugar control, foot care, regular exams (CDC, Diabetes and Nerve Damage) |
| Alcohol | Limiting alcohol (NINDS, Peripheral Neuropathy) |
| Thyroid, kidney or liver disease | Treating the condition (Mayo Clinic, Peripheral Neuropathy) |
| Medicines that affect nerves | Talking to the prescriber before any change (NINDS, Peripheral Neuropathy) |
The causes guide covers the full list.
Before you buy06
Should you test for B12 before taking a nerve supplement vitamin?
Yes, test before you guess. A B12 test costs far less than months of the wrong supplement, and it points your doctor toward the real cause.
Ask for the test
Say you have numbness or tingling and ask whether B12 should be checked (NIH ODS, Vitamin B12).
List your drugs
Include metformin and any acid reducer, since both can lower B12 (NIH ODS, Vitamin B12).
Follow the advice
If your level is low, use the form and dose your doctor sets.
Recheck
Ask when to retest, so you know whether the plan is working.
Nervecept07
Does Nervecept contain vitamin B12 or biotin?
No, Nervecept does not list vitamin B12 or biotin. The label has eight lines, and none is a vitamin.
The sales page FAQ mentions biotin and a "proprietary blend" (Nervecept sales page). The label shows neither. When the two disagree, the label wins. If you take a biotin product elsewhere, know that high biotin intakes can falsely skew some lab tests, including thyroid and troponin tests (NIH ODS, Biotin).
So Nervecept will not fix a B12 shortage. Its 699 mg are led by 500 mg of glucosamine sulfate, and the research on its lines is mostly about knee osteoarthritis (NCCIH, Glucosamine and Chondroitin). It also contains shellfish (crayfish). Read the supplement facts and the ingredient review to see every line.
Keep taking prescribed medicine as directed. New, spreading or worsening numbness, weakness or balance trouble needs a doctor, not only a vitamin.
FAQ08
Vitamin B12 and nerve questions
What are the symptoms of vitamin B12 deficiency in the nerves?
Numbness and tingling in the hands and feet are the nerve signs named, and they can appear without anemia (NIH ODS, Vitamin B12). Other causes of neuropathy look similar, so a blood test is the only way to know. See a doctor if it persists.
Can B12 deficiency be mistaken for diabetic neuropathy?
It can look similar, since both cause tingling in the feet (MedlinePlus, Peripheral Neuropathy). People can also have both, because metformin may lower B12 (NIH ODS, Vitamin B12). A doctor can check blood sugar and B12 together to tell them apart.
How much B12 is too much?
We found no upper limit in the source we checked, so we will not give one. For adults, the RDA is 2.4 mcg a day (NIH ODS, Vitamin B12). Ask your doctor or pharmacist before taking a high-dose product, especially with other medicines.
Is B6 safe for nerve health?
Not in excess. NINDS lists too much vitamin B6 as a cause of neuropathy, as well as too little (NINDS, Peripheral Neuropathy). Add up the B6 in every product you take, and ask your pharmacist before starting a new one.
Do nerves recover after B12 is corrected?
Sometimes. NINDS says correcting the underlying cause can sometimes allow nerves to recover (NINDS, Peripheral Neuropathy). We found no source giving a timeline for B12, so ask your doctor what to expect and when to recheck.
Can biotin affect my blood test results?
Yes. High biotin intake can cause falsely normal or abnormal results in some lab tests, including thyroid hormone tests (NIH ODS, Biotin). Tell your doctor and the lab about any biotin product before a blood draw.
Who wrote this09
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by a licensed U.S. retail desk for Nervecept, not by the manufacturer or the distributor. We are paid a commission when you buy through our order links.
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