Vitamins and nerves
Can Low Vitamin B12 Cause Numbness and Tingling? What to Know Before Any Nerve Supplement
Quick answer
Yes. Low vitamin B12 can make hands and feet numb or tingly, it is common, and a blood test can find it. Metformin, older age and a diet with no animal foods raise the chance of running low. Quiet Nerves contains no vitamin B12, so it would not correct a shortfall.
Of all the causes of tingling hands and feet, low B12 is among the easier ones to check and to correct. That is why doctors tend to think of it early, and why this post exists.
It covers what the medical sources say, who is more likely to run low, what to ask for, and why a nerve capsule is not the same as a B12 plan. Sources that this site does not cite, including those on other B vitamins, are not used.
Key facts
- Low vitamin B12 can make hands and feet numb or tingly.
- It is common, and a blood test can find it.
- The diabetes drug metformin might reduce how much B12 the body absorbs.
- Older adults and people who eat no animal foods are more likely to run low.
- Quiet Nerves names six ingredients and none is vitamin B12.
- The cited sources do not rank other B vitamins for nerve repair.
Link
Can low vitamin B12 really cause numb or tingly hands and feet?
Yes. The NIH fact sheet on vitamin B12 lists numb or tingly hands and feet among the signs of a low level (NIH ODS, vitamin B12). Medical sources on neuropathy name it among the causes a doctor checks (NINDS, peripheral neuropathy).
Why it matters: low B12 has its own fix. Finding it early means the cause is treated, not just the feeling.
Risk
Who is more likely to run low on B12?
| Group | Why it is raised |
|---|---|
| People who take metformin | The diabetes drug might reduce how much B12 the body absorbs and lower blood levels over time |
| Older adults | More likely to run low |
| People who eat no animal foods | More likely to run low |
Being in a group does not mean you are low. It means a test is worth asking about.
Test
How is low B12 found?
With a blood test. Ask your doctor whether one makes sense for you, especially if you take metformin or your diet has no animal foods.
If a test shows a low level, your doctor will suggest how to correct it and when to recheck. Do not stop metformin or any other prescribed medicine on your own.
B vitamins
What about B complex and other B vitamins for nerves?
The sources behind this site cover vitamin B12 for nerves, and they do not cover the other B vitamins. So we cannot say which B vitamin is best for nerve repair, and we will not name a winner.
What we can say is that a product with many B vitamins is not a substitute for finding out what your own levels are. Ask your doctor, then read the label of anything you buy.
Quiet Nerves
Does Quiet Nerves contain vitamin B12?
No. The six named ingredients are magnesium glycinate, alpha lipoic acid, butcher's broom, L-carnitine, turmeric and coenzyme Q10. Vitamin B12 is not among them.
| Item | What is published |
|---|---|
| Six ingredients named | Coenzyme Q10, turmeric (95% curcuminoids), L-carnitine, butcher's broom, alpha lipoic acid and magnesium glycinate |
| Vitamin B12 among the six named ingredients | No |
| Amount of each one | Not published |
| Capsule shell and other ingredients | Not published |
So if low B12 is behind your tingling, this capsule would not fix it.
Order of steps
Why get checked before starting a nerve supplement?
Starting a capsule first can blur the picture. When your doctor asks how your symptoms have changed, a new supplement muddies the answer.
- See a doctor and describe your symptoms.
- Ask whether B12 and blood sugar tests fit.
- Show the ingredient list of any supplement you are thinking of using.
- Add a supplement only if your doctor is comfortable with it.
Other causes
What else can cause the same symptoms?
- Diabetes, the leading US cause, where up to half of people have some form of neuropathy (NIDDK, diabetic peripheral neuropathy).
- Heavy drinking over time.
- Some medicines, including certain cancer drugs.
- Infections, kidney or thyroid problems, autoimmune disease and inherited conditions.
- Sometimes no cause is found.
Urgent
Which signs need help right away?
Sudden numbness or weakness in the face, arm or leg, especially on one side, sudden trouble speaking, seeing or walking, a drooping face, or any trouble breathing: call 911. Weakness that spreads quickly up the legs or into the arms is also an emergency.
A foot sore that is not healing, symptoms that began soon after a new medicine, or falls from weak hands or feet need a call to your doctor within days.
FAQ
Frequently asked questions
Can low vitamin B12 cause numbness and tingling?
Yes. Low B12 can make hands and feet numb or tingly, it is common, and a blood test can find it.
Does metformin cause low B12?
Metformin might reduce how much B12 the body absorbs and lower blood levels over time. Ask your doctor about a test, and do not stop the medicine on your own.
Does Quiet Nerves contain vitamin B12?
No. Its six named ingredients are magnesium glycinate, alpha lipoic acid, butcher's broom, L-carnitine, turmeric and coenzyme Q10.
Which B vitamin is best for nerve repair?
The sources behind this site do not rank B vitamins other than B12, so we cannot name one. Ask your doctor, and no supplement has been shown to repair nerves.
Who is more likely to have low B12?
People who take metformin, older adults and people who eat no animal foods.
Should I test B12 before taking a nerve supplement?
Ask your doctor first. A new supplement can blur the picture when you describe how your symptoms change.
Sources
Which sources does this post rely on?
Each source below is one that the Quiet Nerves site already cites. The links open the original pages.
- NIH ODS, vitamin B12. NIH Office of Dietary Supplements. Vitamin B12: Fact Sheet for Consumers. Updated December 15, 2023.
- NINDS, peripheral neuropathy. National Institute of Neurological Disorders and Stroke. Peripheral Neuropathy. Last reviewed March 13, 2026.
- NIDDK, diabetic peripheral neuropathy. National Institute of Diabetes and Digestive and Kidney Diseases. Peripheral Neuropathy. Last reviewed February 2018.
- NCCIH, using supplements wisely. National Center for Complementary and Integrative Health. Using Dietary Supplements Wisely. Last updated January 2019.
- FDA, dietary supplements Q and A. U.S. Food and Drug Administration. Questions and Answers on Dietary Supplements. Content current as of August 27, 2026.
Our view
Our view
Can low vitamin B12 cause numbness and tingling? Yes, and it is one of the more fixable causes. That makes a blood test a better first step than a guess in a bottle.
Quiet Nerves does not contain B12, and it says so on its own pages. If you want to try it after your doctor visit, do so knowing what it can and cannot cover.
Last updated . Written by the Quiet Nerves Editorial Desk at Goquietnerves. Medically reviewed by Dr. Eric Roberts, DPM, Podiatrist. This is general information, not medical advice. Quiet Nerves is a dietary supplement, not FDA approved, and not a treatment for neuropathy or any disease. Ask your own doctor or pharmacist about your own health and medicines.