Nerve basics
Causes of peripheral neuropathy: what clinicians look for first
Causes of peripheral neuropathy include diabetes, a vitamin B12 shortage, alcohol, some medicines, pressure on a nerve, and kidney, liver or thyroid disease; sometimes no cause is found. Only a clinician can tell which applies. A supplement such as Flow Nerves cannot find the cause, and no trial tested it.
Written by the Flow Nerves label deskUpdated · 5 min read
The list
What are the causes of peripheral neuropathy?
Causes of peripheral neuropathy are many: NINDS counts more than 100 types, and diabetes is the leading cause in the U.S. (NINDS, Peripheral neuropathy).
About two-thirds of people with diabetes have some nerve problem. Other causes NINDS names are B12 deficiency, alcohol, toxins, medicines, compression, injury, autoimmune disease, kidney and liver disorders and infections. Mayo Clinic adds low copper or vitamin E, and says some medicines, especially chemotherapy, can be a cause (Mayo Clinic, Peripheral neuropathy).
| Cause | Source says |
|---|---|
| Diabetes | Leading U.S. cause (NINDS) |
| Vitamin B12 shortage | Numbness and tingling, even without anemia (NIH) (NIH ODS, Vitamin B12) |
| Alcohol, medicines | Named by NINDS and Mayo Clinic |
| Nerve pressure | Casts, crutches, repetitive motion (Mayo Clinic) |
Cause first
Why does a cause search come before a supplement?
Because the cause decides the care, and early diagnosis gives the best chance of managing symptoms.
Mayo Clinic says to seek medical care right away for tingling, weakness or pain in your hands or feet (Mayo Clinic, Peripheral neuropathy). NIH says older adults, vegans and vegetarians, and people on metformin or acid reducers are at higher risk of B12 deficiency, so ask a clinician about a test. B12 is not one of the six named ingredients in Flow Nerves.
When it is urgent
When are numbness and tingling an emergency?
Sudden numbness or weakness, especially on one side, with face droop or trouble speaking, seeing or walking, is a 911 call.
CDC lists these as stroke signs and says to call 9-1-1 right away (CDC, Stroke signs and symptoms). Chest pain, trouble breathing and loss of bladder or bowel control also need emergency care. Keep taking prescribed medicine, and never stop or change one on your own. Tell your clinician and pharmacist about every supplement you take.
Flow Nerves capsule: 30 a bottle1 capsule a day per the seller's FAQ · 2, 3 or 6 bottles · 2 bottles at $79 each · other prices at checkout
See the priceWhere Flow Nerves fits
Where does Flow Nerves fit among the causes?
It does not address a cause: it is a capsule with six named ingredients, no printed amounts and no trial of its own.
Magnesium
Little17 of 100
We found no human trial of magnesium glycinate for nerve symptoms; a Cochrane review found no clinically meaningful cramp benefit in older adults. (NIH ODS, Magnesium)
Alpha lipoic acid
Mixed36 of 100
Trials were in people already diagnosed with diabetic neuropathy at about 600 to 1,800 mg a day; the 4-year trial missed its main goal. (Hsieh 2023, oral alpha-lipoic acid meta)
Butcher's broom
Little17 of 100
The evidence is about leg swelling and heaviness from veins; we found no trial of butcher's broom for nerve symptoms. (Vanscheidt 2002, butcher's broom trial)
L-carnitine
Little17 of 100
The neuropathy trials used acetyl-L-carnitine at 1,500 to 3,000 mg a day, and the Cochrane review rates the certainty very low. (NIH ODS, Carnitine)
Turmeric
Little17 of 100
The one randomized trial we read (40 mg of nanocurcumin twice a day for 16 weeks) found no difference in pain or neuropathy scores; LiverTox rates turmeric 'A' for liver injury cases. (NCCIH, Turmeric)
Coenzyme Q10
Very little6 of 100
MSK mentions one placebo-controlled trial that suggested less pain in diabetic neuropathy; we read no trial of our own, and the statin-pain meta-analysis found no benefit. (MSK, Coenzyme Q10)
Our reading of the sources, not a measurement. Each needle is an editor's judgment of how well human studies support the nerve-support line for that ingredient, at studied amounts. It does not rate Flow Nerves: no study tested the capsule or this six-ingredient blend.
The gauges are an editor's reading of human studies for nerve symptoms, not a rating of Flow Nerves. We hold no Supplement Facts panel.
90-capsule supply
3 bottles: 90 capsules
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180-capsule supply
6 bottles: 180 capsules
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See 6 bottlesDollar amounts for these two packs are shown at the live checkout; the seller's brief printed none (Flow Nerves sales site). Two bottles are also sold at $79 each. If you take blood thinners, diabetes medicine or thyroid hormone, ask a clinician or pharmacist before you order.
FAQ
Flow Nerves questions people ask
What is the most common cause of peripheral neuropathy?
NINDS says diabetes is the leading cause in the U.S., and about two-thirds of people with diabetes have some nerve problem. A clinician can check blood sugar and look for other causes.
Can a vitamin B12 shortage cause tingling?
Yes. NIH says B12 deficiency can cause numbness and tingling in hands and feet without anemia. Ask a clinician about a test. B12 is not one of the six named ingredients in Flow Nerves.
Can neuropathy have no known cause?
Yes. Mayo Clinic says sometimes no cause is found. Persistent or new tingling, numbness or weakness still deserves a clinician's exam and tests.
Who wrote this
Written and reviewed by
Pages built from the bottle render, the seller's brief 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 of a licensed U.S. retail desk for Flow Nerves. It is not the manufacturer, and we have not been given the name of the maker. We earn money when you buy through our order links.
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Check your medicines first, and ask a clinician or pharmacist if you take blood thinners, diabetes medicine or thyroid hormone. Then pick a pack: 2, 3 or 6 bottles of 30 capsules. The 2-bottle pack is listed at $79 a bottle; the other prices are shown at checkout. A 60-day satisfaction promise is listed, so confirm the live policy.
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