Guide
Vitamins and Nerves: B12, Vitamin B6 and What to Test
Vitamins and nerves are linked mainly through deficiency: low vitamin B12 can cause numbness and tingling in the hands and feet, and a blood test can check it. Replacement is advised when a level is low, not as a guess. We found no source on vitamin B6. Flow Nerves lists no B vitamin among its six ingredients.
Written by the Flow Nerves label deskUpdated
The link
How are vitamins and nerves connected?
The link that sources describe is a shortage. When the body lacks a vitamin or mineral that nerves need, numbness and tingling can follow. A test finds a shortage. A supplement bought on a hunch does not.
That framing matters for anyone searching for vitamins and nerves. MedlinePlus lists vitamin shortages among the causes of damage to peripheral nerves, and it says vitamin replacement is advised when a level is shown to be low (MedlinePlus, Peripheral neuropathy). NINDS, in turn, lists blood tests among the ways clinicians look for a cause (NINDS, Peripheral Neuropathy). Both point the same way: test first.
The rest of this guide goes through the vitamins readers ask about most. It sticks to what our sources show, and it flags where we found nothing. It also states, plainly, what Flow Nerves does and does not contain.
Shortage, not a boost
Sources tie vitamins to nerve symptoms through deficiency.
Test before you buy
A blood test shows a level. A capsule shows nothing.
Gaps stay gaps
Where we found no source, we say so and stop.
Vitamin B12
What does vitamin B12 deficiency do to nerves?
Vitamin B12 deficiency can cause numbness and tingling in the hands and feet. The NIH Office of Dietary Supplements adds that this can occur without anemia, so a normal blood count does not rule it out.
ODS also notes that some medicines lower B12 absorption, including metformin and acid-reducing medicines (NIH ODS, Vitamin B12 (health professional fact sheet)). Mayo Clinic lists B12 on its page about supplements and diabetic neuropathy for the same reason (Mayo Clinic, Diabetic neuropathy: Can dietary supplements help?). The practical points are short.
- Ask your clinician whether a B12 level makes sense for your symptoms or medicines.
- Tell your clinician if you take metformin or an acid-reducing medicine. Do not change either on your own.
- If a level is low, your clinician chooses the way to replace it.
The reverse does not follow. A normal level means B12 is not your explanation, and extra B12 will not fix a different cause. Numbness has many causes, which is why nerve pain basics covers the whole list.
Vitamin B6
What do we know about vitamin B6 and nerves?
From the sources we hold, nothing we can print. None of our public health sources covers vitamin B6 and nerves, so we give no figure, no safe range and no claim.
That gap is deliberate honesty, not a hint. Vitamin B6 is a common ingredient in nerve-themed supplements, and readers reasonably want an answer. We would rather send you to your pharmacist than invent one. Ask them about B6 in any multivitamin or B-complex you already take, because B vitamins turn up in many products.
An older Cochrane review of B vitamins for peripheral neuropathy, with searches that ended in 2005, found the evidence insufficient. It is old and covers B vitamins as a group, so it does not settle the question for B6 or for any current product.
At a glance
Which vitamins and minerals touch on nerve symptoms?
Only a few come up in our sources, and each appears as a shortage or a caution. The table also shows whether it is part of the Flow Nerves ingredient list.
| Item | What a source says | In Flow Nerves? |
|---|---|---|
| Vitamin B12 | Deficiency can cause numbness and tingling in the hands and feet (NIH ODS, Vitamin B12 (health professional fact sheet)). | No |
| Vitamin B6 | Not covered by our sources. | No |
| Thiamin (B-1) | Mayo mentions a thiamin caution next to alpha-lipoic acid: high doses might cause seizures in people low in thiamin, and heavy alcohol use is a reason to avoid (Mayo Clinic, Diabetic neuropathy: Can dietary supplements help?). | No |
| Magnesium | Deficiency can cause numbness, tingling and cramps; the supplement upper level is 350 mg a day, and the kidney caution is real (NIH ODS, Magnesium (health professional fact sheet)). | Yes, as magnesium glycinate, no amount printed |
The magnesium row describes a shortage, which is not the same as a result from taking a capsule. Our magnesium glycinate page gives the cautions with kidney problems and certain medicines.
Flow Nerves: capsules, 30 per bottle2, 3 or 6 bottles · 60-day promise, confirm at checkout
See packsBefore you buy
What should you ask before buying a vitamin for your nerves?
Ask what problem the vitamin is meant to answer, and whether a test has shown that problem. If nobody can name it, the purchase is a guess, and guesses cost money and sometimes interact with medicine.
A test-first path
- Your symptoms are written down with dates.
- Your clinician orders the blood tests they think fit.
- Replacement, if needed, matches a measured level.
- Your pharmacist checks the list against your medicines.
A guess-first path
- A product is picked from an advertisement.
- Several supplements overlap without anyone noticing.
- A real cause, such as diabetes or a thyroid problem, waits.
- No one checks it against medicine you already take.
The FDA's consumer page on mixing medicines and supplements tells people to share a full list with their health professionals (FDA, Mixing Medications and Dietary Supplements Can Endanger Your Health). Natural does not mean safe, and a vitamin is no exception. Take the same care with a B-complex that you would take with any pill.
Flow Nerves
Does Flow Nerves contain vitamins for nerves?
No B vitamin is named. The six ingredients on the sales page are magnesium glycinate, alpha-lipoic acid, butcher's broom root extract, L-carnitine, turmeric extract and coenzyme Q10. Magnesium is a mineral, and the others are not vitamins.
So a vitamin level will not tell you whether the product fits you, and the product will not change a vitamin level. It is a capsule supplement, 30 to a bottle, and the sales page prints no amount for any ingredient. No study tested it. The FDA does not approve supplements before sale (FDA, Questions and Answers on Dietary Supplements). See the ingredients page and the label page for what is printed.
If you take medicine, show the list to your pharmacist first and keep taking prescribed medicine. Our guide to reading a nerve supplement label shows how to do that for any product, and the pack prices sit apart from all of this.
Flow Nerves: capsules, 30 per bottle2, 3 or 6 bottles · 60-day promise, confirm at checkout
See packsFAQ
Flow Nerves questions people ask
Can low vitamin B12 cause numbness and tingling?
Yes. The NIH Office of Dietary Supplements says deficiency can cause numbness and tingling in the hands and feet, and it can occur without anemia. A blood test can check your level.
What do we know about vitamin B6 and nerves?
We found no source on it, so we give no claim or figure. Ask your pharmacist about B6 in products you already take.
Should I take vitamins for tingling hands and feet?
Not as a guess. Sources advise replacement when a level is low, so ask for a test first and let your clinician choose.
Which medicines can lower vitamin B12?
ODS names metformin and acid-reducing medicines. Do not change either; ask your doctor or pharmacist whether a B12 level makes sense.
Does Flow Nerves contain vitamin B12 or B6?
No. Its six named ingredients are magnesium glycinate, alpha-lipoic acid, butcher's broom root extract, L-carnitine, turmeric extract and coenzyme Q10.
Do B vitamins treat neuropathy?
No source we can cite says so. The only review we hold is old, covers B vitamins as a group and found the evidence insufficient.
Who wrote this
Written and reviewed by
Pages built from the sales page and linked NIH, CDC, FDA, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site of a U.S. retail partner for Flow Nerves. It is not the manufacturer, and it is not the sales page where orders are placed. We earn money when you buy through our order links.
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