Nerve Health

How peripheral nerves work, why they are damaged by diabetes, deficiencies, toxins and disease, what the symptoms mean, and what actually helps.

Written by HealthDiseases Research TeamUpdated 1 September 2026

Educational hub

The peripheral nerves are the wiring between the brain and spinal cord and the rest of the body: sensory fibres carrying touch, pain, temperature and position sense inward; motor fibres carrying movement commands outward; and autonomic fibres regulating heart rate, blood pressure, digestion, bladder and sweating without conscious control. A single fibre can run a metre from the spine to a toe, and keeping that length alive demands a constant supply of energy and blood.

When that supply fails — through high blood glucose, vitamin deficiency, alcohol, chemotherapy, autoimmune attack, inherited disorders or dozens of other causes — the longest fibres suffer first. That is why peripheral neuropathy so often announces itself as tingling, burning or numbness in the toes, spreading slowly upward. About 20 million Americans have some form of it; diabetes is the commonest cause, and about half of people with diabetes develop it.

The guides in this hub explain the types of neuropathy, what the symptoms mean, the deficiencies that damage nerves and are easily corrected, the treatments for nerve pain, and the evidence — thin in most cases — for supplements.

Conditions

Diabetic neuropathy Nerve damage affects about half of people with diabetes and is often present at diagnosis. It is silent at first, painful for some, and dangerous mainly because of what it stops you feeling.
Peripheral neuropathy Neuropathy is not one disease but a pattern of nerve damage with more than a hundred causes. Finding the cause is what makes it treatable.
Type 2 diabetes Type 2 diabetes develops when the body stops responding to insulin properly and the pancreas can no longer compensate. It is common, often silent at first, and largely manageable once found.

Symptoms

Tingling in hands and feet Everyone knows the pins and needles of a leg that has gone to sleep. Tingling that arrives without a reason, keeps returning, or spreads is a different matter, and the pattern usually points to the cause.

Health guides

Blood sugar and nerve health Nerve damage is the most common complication of diabetes and one of the earliest. Understanding why it starts in the feet — and why it is silent — is the key to preventing it.
How high blood sugar affects the body Glucose is fuel, but at high concentrations for long periods it is also corrosive. This guide follows the damage from the blood vessels outward, organ by organ.
Vitamin B12 deficiency B12 deficiency damages nerves before it shows in a blood count, and the damage can become permanent. It is common, easily missed, and one of the most rewarding things to find.

Ingredients

What the evidence says about ingredients commonly used in this area.

Alpha-lipoic acid Alpha-lipoic acid is often sold as a blood sugar supplement, but its real evidence lies elsewhere — in the symptoms of diabetic nerve damage, where it is a licensed treatment in some countries.
Benfotiamine Benfotiamine is a fat-soluble form of vitamin B1 sold widely for nerve health. Its evidence rests on a few short trials with modest results, and one larger trial that found nothing.

Supplement research in this area

Some people explore dietary supplements as part of a broader wellness routine. Supplements should not replace prescribed medication, medical monitoring, diet or other recommended care. Our supplement pages evaluate formulas, ingredient evidence and safety considerations, and contain affiliate links with disclosure.

Nerve support supplements

References

National Institute of Neurological Disorders and Stroke. Peripheral Neuropathy (2024). https://www.ninds.nih.gov/health-information/disorders/peripheral-neuropathy
NIDDK. Diabetic Neuropathy (2023). https://www.niddk.nih.gov/health-information/diabetes/overview/preventing-problems/nerve-damage-diabetic-neuropathies