Your nervous system is one of the hungriest systems in your body. The brain is one of the most energy-hungry organs you have, and the nerves running to your fingers and toes need a steady supply too. Every thought, step and heartbeat depends on nerves sending signals, maintaining their myelin insulation and repairing everyday wear. That takes energy and specific nutrients. If you have ever had a foot "fall asleep" or felt tingling in your hands, you have had a small reminder of how sensitive nerves are. Here are the basics.
Why we write about this
Audacious was founded by a neuroscientist who studies nerve energy and ketones. Fuel is only part of the story; the building blocks matter too. Whatever eating pattern you follow, including a ketogenic one, your nerves still need the vitamins, minerals and fats covered below.
Key nutrients for nerves
| Nutrient | Why nerves need it | Food sources |
|---|---|---|
| Vitamin B12 | Maintaining myelin and nerve function | Fish, meat, eggs, dairy |
| Vitamin B1 (thiamine) | Energy metabolism in nerve cells | Pork, seeds, legumes |
| Vitamin B6 | Making neurotransmitters (too much can also harm nerves) | Poultry, fish, potatoes |
| Folate | Works with B12 in nerve health | Leafy greens, legumes |
| Omega-3 fats | Part of nerve cell membranes | Salmon, sardines, walnuts |
| Magnesium | Nerve and muscle function, energy production | Nuts, seeds, spinach |
| Vitamin E | Antioxidant protection of nerve membranes | Nuts, seeds, plant oils |
A closer look at the B vitamins
Vitamin B12 helps make and maintain myelin, the fatty insulation around many nerve fibers. Without enough B12, myelin can break down and signals slow or misfire. B12 is found almost only in animal foods, so people who eat little or no animal food usually need fortified foods or a supplement.
Thiamine (B1) helps nerve cells turn glucose into energy. Severe shortage is uncommon in places with fortified grains, but it can happen with heavy alcohol use, after some weight-loss surgeries, or with very restricted diets.
Vitamin B6 helps make neurotransmitters, the chemical messengers between nerve cells. It is also the clearest example of "more is not better." In a 1983 report of 7 adults who took high doses of B6 every day, all developed nerve damage in their senses, such as numbness and poor balance; four were severely disabled, and all improved after stopping. View the abstract Check labels, because B6 shows up in many multivitamins, energy drinks and "nerve support" blends.
Folate works hand in hand with B12. Taking a lot of folic acid can hide the blood signs of B12 deficiency while nerve damage continues, which is one more reason to test rather than guess.
Fats and minerals
Omega-3 fats (EPA and DHA) are part of the membranes that surround nerve cells. Oily fish like salmon and sardines are the richest sources; walnuts, flax and chia provide a plant form that the body converts in small amounts.
Magnesium helps nerves fire and relax properly and is involved in energy production. Many adults do not get enough from food. Nuts, seeds, leafy greens and avocado are good sources that also fit a ketogenic diet.
Vitamin E is an antioxidant that helps protect the fats in nerve membranes from damage. Nuts, seeds and plant oils provide it.
Who is at higher risk of a deficiency?
Deficiencies, especially of B12, can cause nerve symptoms like numbness or tingling. People on metformin, acid-reducing medications, plant-based diets or over 50 may be at higher risk. Ask your doctor whether testing makes sense for you. Two studies show why:
- Metformin: in a randomized controlled trial of 390 people with type 2 diabetes in the Netherlands, those taking metformin for about 4.3 years had B12 levels 19% lower on average than those on placebo, and a higher risk of B12 deficiency. The authors suggested regular B12 checks for people on long-term metformin. View the abstract
- Acid reducers: in a large case-control study of health records from Kaiser Permanente Northern California, comparing about 26,000 people with B12 deficiency to about 184,000 without it, taking proton pump inhibitors (such as omeprazole) for 2 years or more was linked to about 65% higher odds of B12 deficiency. H2 blockers (such as famotidine) were linked to about 25% higher odds. This type of study shows an association, not proof of cause. View the abstract
If you take either type of medicine, do not stop it on your own. Ask your doctor whether a simple blood test makes sense.
Habits that protect nerves
- Keep blood sugar in a healthy range; high blood sugar over time can damage nerves. This is why diabetes is one of the most common causes of peripheral neuropathy (damage to the nerves in the hands and feet).
- Do not smoke, and limit alcohol. Smoking narrows blood vessels that feed nerves, and heavy drinking can lower thiamine and other B vitamins and harm nerves directly.
- Stay active; exercise supports blood flow to nerves. Even a daily walk counts.
- Do not megadose supplements; more is not always better, as the B6 example shows.
- Protect your feet if you have numbness. Check them daily for cuts or blisters you might not feel.
- Sleep well. Sleep is when much of the body's repair work happens.
Myelin and fats
Myelin, the insulation around many nerve fibers, is built largely from fats. That does not mean eating more fat builds more myelin, but it does mean your body needs a steady supply of the right building blocks, including healthy fats and B12. Learn what myelin is and why it matters.
Energy: where ketone research fits
Nerve repair takes energy. That is why researchers study ketones, an alternative brain fuel, after nerve injury. Here is why.
- A systematic review of 11 animal studies found ketogenic diets or fasting after spinal cord or nerve injury were often linked to benefits.
- Dr. Csilla Ari's 2024 lab study found injured neurons given BHB moved into the damaged area more than untreated cells.
This is animal and lab research, not a substitute for a balanced diet or medical care.
Building a nerve-friendly ketogenic plate
A ketogenic diet cuts out grains, beans and most fruit, which are sources of some B vitamins, folate and magnesium. With a little planning you can still cover the basics:
- B12 and B6: eggs, fish, poultry and meat.
- Thiamine: pork, sunflower seeds and some nuts, since fortified grains are off the menu.
- Folate: leafy greens, asparagus, broccoli and avocado.
- Omega-3s: salmon, sardines or mackerel two or more times a week.
- Magnesium: pumpkin seeds, almonds, spinach and avocado.
- Vitamin E: sunflower seeds, almonds and olive oil.
A sample day might look like eggs with spinach and avocado for breakfast, a big salad with salmon, pumpkin seeds and olive oil for lunch, and pork chops with roasted broccoli for dinner. If you are unsure whether you are covering your needs, a registered dietitian can review a few days of your meals.
Common questions
What are early signs of a B12 deficiency?
Common signs include numbness or tingling in the hands or feet, tiredness, balance problems, a sore tongue and memory changes. These symptoms have many possible causes, so see your doctor rather than self-diagnosing.
Should I take a "nerve support" supplement?
Not without checking with your doctor, especially if it contains B6. Many of these products combine several B vitamins at high doses, and you may already be getting B6 from other supplements.
Does a ketogenic diet put my nerves at risk of deficiency?
Not necessarily. A ketogenic diet built around eggs, fish, meat, leafy greens, nuts and seeds can cover most nerve nutrients. The risk comes from a narrow diet that relies on just a few foods.
Can good nutrition reverse nerve damage?
Correcting a true deficiency, such as low B12, may help symptoms improve, especially when caught early. Nutrition cannot undo every kind of nerve damage, which is why a medical evaluation matters.
The bottom line
Healthy nerves need B vitamins, healthy fats, minerals and steady energy, plus good habits. Get tested if you are at higher risk of B12 deficiency, and avoid megadoses, especially of B6. If you follow a ketogenic lifestyle, plan it to include nutrient-dense foods. KETOSTART is designed to help you reach and maintain ketosis, with electrolytes in every serving.
References
- Schaumburg H, Kaplan J, Windebank A, et al. Sensory neuropathy from pyridoxine abuse. A new megavitamin syndrome. New England Journal of Medicine. 1983;309(8):445-448. PubMed
- de Jager J, Kooy A, Lehert P, et al. Long term treatment with metformin in patients with type 2 diabetes and risk of vitamin B-12 deficiency: randomised placebo controlled trial. BMJ. 2010;340:c2181. PubMed
- Lam JR, Schneider JL, Zhao W, Corley DA. Proton pump inhibitor and histamine 2 receptor antagonist use and vitamin B12 deficiency. JAMA. 2013;310(22):2435-2442. PubMed
- Sayadi JJ, Sayadi L, Satteson E, Chopan M. Nerve injury and repair in a ketogenic milieu: a systematic review of traumatic injuries to the spinal cord and peripheral nervous tissue. PLOS ONE. 2021;16(1):e0244244. PubMed
- Ari C, D'Agostino DP, Cha BJ. Neuroregeneration improved by sodium-D,L-beta-hydroxybutyrate in primary neuronal cultures. Pharmaceuticals (Basel). 2024;17(9):1160. PubMed
Disclosure: Dr. Csilla Ari, a co-author of reference 5, is the founder of Audacious.
This article is for education only and is not medical advice. These statements have not been evaluated by the FDA. Our products are not intended to diagnose, treat, cure or prevent any disease. Talk to your doctor about nerve symptoms or before taking supplements.