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Peripheral Neuropathy — a functional-medicine root-cause overview from the Integrative You clinical team

CONDITION · ROOT-CAUSE GUIDE

Peripheral Neuropathy: Root Causes When It Is Not Diabetes

Medically reviewed by Dr. Nicole Rivera, DC, IFMCLast updated

A quarter of neuropathy is labelled idiopathic. In practice that usually means the workup stopped at a fasting glucose.

Prediabetes
Insulin resistance
Sjogrens

The short answer

What causes peripheral neuropathy if I am not diabetic?

Most often B12 deficiency, insulin resistance that has not yet reached diabetes, alcohol, thyroid dysfunction, autoimmune disease such as Sjögren's or coeliac, heavy metal exposure, or medication effects. Roughly a quarter of cases are labelled idiopathic, usually after an incomplete workup.

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Common signs & symptoms

Burning or tingling in feet or hands · Numbness that spreads upward · Night-time worsening · Sensitivity to light touch · Balance problems

Nerve Damage Starts Before Diabetes

Small-fibre nerve damage is measurable in prediabetes and even in people with normal fasting glucose but high post-meal spikes. Fasting glucose is the last marker to move, so a normal result excludes very little.

Fasting insulin, HbA1c and a post-meal glucose response give a far earlier read on whether metabolism is the driver.

Nutrient and Toxic Causes

B12 deficiency is the classic reversible cause, and it is routinely missed because serum B12 can look normal while methylmalonic acid is elevated. B6 is the mirror image: too little causes neuropathy, and so does too much from supplementation.

Alcohol, heavy metals, some chemotherapy agents and long-term metformin use, which depletes B12, all belong on the list.

Autoimmune and Infectious Drivers

Small-fibre neuropathy appears in Sjögren's, coeliac disease, sarcoidosis and post-viral states including long COVID. Tick-borne infection is a recognised cause in endemic areas.

These are the cases most often filed as idiopathic, because the nerve conduction study is normal — large fibres are intact, small fibres are not, and standard testing does not see them.

15 years of pattern recognition

The three roots we find under peripheral neuropathy.

Almost every chronic case we've seen traces back to one — or a combination — of these three lenses. The label on your chart is rarely the cause. The cause is upstream.

Lens 1 of 3

Emotional · Psychosomatic

The brain is a prediction machine running on safety. Unprocessed trauma, suppressed emotion, and chronic identity conflict keep it stuck in threat — not in chemistry.

What it looks like

'Treatment-resistant' depression in someone whose actual life is depressing. No SSRI fixes a life misaligned with values.

Lens 2 of 3

Toxic Load

Heavy metals (especially mercury and aluminum), mold mycotoxins, neuro-inflammatory chemicals, alcohol, and SSRIs themselves all stress neurotransmitter pathways.

What it looks like

Brain fog and panic attacks that started after a mold-exposed apartment, dental work, or a heavy antibiotic / vaccine year.

Lens 3 of 3

Dysbiosis · Infection

90% of serotonin is made in the gut. Dysbiosis, SIBO, parasites and chronic stealth infections (PANS/PANDAS, Bartonella) drive 'psychiatric' symptoms.

What it looks like

OCD or sudden personality changes in a child after strep — never about willpower, always about an inflamed brain.

The Black Sheep philosophy

It's not what you do. It's how you do it.

Supplements don't fail. Detoxes don't fail. People fail to find the ONE foundational issue — the lever that, once moved, lets every other system autocorrect. We're not chasing symptoms. We're hunting the root that holds the whole pattern in place.

The top 5 blind spots

What conventional medicine isn't telling you about peripheral neuropathy.

Not because anyone is careless — because the visit is ten minutes long and the panel is built to rule out disease, not to explain why you feel like this. These are the five things we look at that almost nobody else does.

  1. 1

    A misaligned life is not a chemical imbalance

    What you're told

    Screening questionnaire, then a prescription.

    What we look at

    Whether your symptoms are an accurate response to your actual life, and what has to change structurally.

  2. 2

    Serotonin is mostly made in the gut

    What you're told

    The gut is never part of a psychiatric workup.

    What we look at

    Dysbiosis, SIBO, and parasites driving symptoms that got labeled psychiatric.

  3. 3

    Neuroinflammation

    What you're told

    Inflammation is not measured in mood or cognitive complaints.

    What we look at

    Mold toxins, metals, and post-infectious inflammation — including sudden-onset changes in children after infection.

  4. 4

    Blood sugar and mitochondria

    What you're told

    Fasting glucose looks fine, so metabolism is ruled out.

    What we look at

    Glucose stability across the day and whether your cells can make energy at all. Brain fog is often an energy problem.

  5. 5

    Unprocessed trauma living in the body

    What you're told

    Handled in a separate silo from the physical case.

    What we look at

    What the nervous system is still bracing for, and how that keeps the biochemistry stuck.

Why our intake is different

90% of the clarity comes from how we ask, not what we run.

Our assessments and intake are built to be precise enough that your history finally pieces itself together — the timeline, the exposures, the emotional load, the labs everyone called normal. That is where root cause shows up. Testing confirms and sequences it; it does not replace it.

It is not about what you do. It is about how you do it. Strategy and integration decide the outcome.

Test, don't guess

Which path is actually yours.

Guessing is expensive — in money, in years, and in quality of life. The right entry point depends on how complex your case is and how much your daily life is being taken from you.

You want foundational wellness

Foundation Program

Symptoms are real but life is functioning. You need the foundation built correctly and in the right order — not another protocol you abandon in week three.

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It is complex — you need the map

DNA Precision

Multiple systems involved, symptoms that contradict each other, or labs that keep coming back normal. The stressors on your DNA plus biomarkers tell us what your body cannot do on its own, and what to sequence first.

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Quality of life is suffering

Private Concierge

When it is severe, layered, or time-sensitive, you get Dr. Nicole and the clinical team on your case directly — testing, strategy, and integration handled with you, week over week.

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Documented outcomes · real labs

What this looks like when it actually works.

All case studies

What you get from us, always

Six promises we don't break.

We never give up

Complex, weird, and "nothing worked" cases are the ones we take.

We have your back

You are not managing this alone between appointments.

We always find the root cause

We keep going upstream until the pattern explains every symptom.

We look at all of you

Mind, body, exposure history, genetics, and the life you are actually living.

Precision or nothing

No shotgun protocols. If we cannot justify it, you do not take it.

Clarity produces outcomes

When you understand why, implementation stops being a willpower problem.

See the intake & precision testing steps

The questions nobody answered for you

What conventional medicine isn't testing you for.

See the intake & precision testing steps

How we think about this clinically

The Klinghardt & bioresonance toolkit

The framework and assessment tools we layer on top of standard functional labs to find root cause faster — especially in chronic, "we've tried everything" cases.

Framework

Dr. Klinghardt's 5 Levels of Healing

The map we use to sequence labs, detox, and neural retraining — instead of stacking supplements at random.

Tool

Bioresonance Therapy — what it actually is

Practitioner-grade read on Oberon, NLS, MORA, BICOM and where bioresonance earns a place next to standard functional labs.

Legacy IWG

Bioresonance at the former IWG clinic

If you found us through Integrative Wellness Group — this is where our bioresonance work moved.

Peripheral Neuropathy: the questions people actually ask

What causes peripheral neuropathy if I am not diabetic?

Most often B12 deficiency, insulin resistance that has not yet reached diabetes, alcohol, thyroid dysfunction, autoimmune disease such as Sjögren's or coeliac, heavy metal exposure, or medication effects.

Roughly a quarter of cases are labelled idiopathic, usually after an incomplete workup.

Can neuropathy be reversed?

Nutrient-driven and early metabolic neuropathy often improves substantially once the driver is corrected.

Long-standing large-fibre damage typically does not fully reverse, which is why early identification matters.

Why was my nerve conduction study normal when my symptoms are real?

Nerve conduction studies measure large fibres.

Burning, temperature sensitivity and pain are small-fibre symptoms, and small-fibre neuropathy requires skin biopsy or autonomic testing to detect.

Frequently asked questions

What causes peripheral neuropathy if I am not diabetic?

Most often B12 deficiency, insulin resistance that has not yet reached diabetes, alcohol, thyroid dysfunction, autoimmune disease such as Sjögren's or coeliac, heavy metal exposure, or medication effects. Roughly a quarter of cases are labelled idiopathic, usually after an incomplete workup.

Can neuropathy be reversed?

Nutrient-driven and early metabolic neuropathy often improves substantially once the driver is corrected. Long-standing large-fibre damage typically does not fully reverse, which is why early identification matters.

Why was my nerve conduction study normal when my symptoms are real?

Nerve conduction studies measure large fibres. Burning, temperature sensitivity and pain are small-fibre symptoms, and small-fibre neuropathy requires skin biopsy or autonomic testing to detect.

Which tests should be run for unexplained neuropathy?

B12 with methylmalonic acid, folate, B6, HbA1c with fasting insulin and a post-meal glucose response, thyroid panel, coeliac serology, ANA and Sjögren's antibodies, ferritin, and heavy metal assessment where exposure is plausible.

Can metformin cause neuropathy?

Indirectly, yes. Long-term metformin depletes B12, and B12 deficiency causes neuropathy — a pattern easily mistaken for diabetic neuropathy progressing.

Not sure if this is you?

Not sure which path fits? Ask us directly.

Tell us your peripheral neuropathy story in a few lines. We'll tell you whether Health Decode, Foundation, DNA Precision, or Private Concierge is the right next move — no pressure, no upsell.

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This page is educational. It is not a substitute for personalized clinical evaluation. If you suspect peripheral neuropathy, work with a qualified practitioner — we can be one of them.

Ready to investigate your case

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Where to go from here

Four ways in. Start at whichever rung is honest for you.

You don't have to commit to a full workup to make progress on peripheral neuropathy. Every rung below feeds the next one — nothing you do at the free end gets thrown away when you move up.

  1. Free · 4 minutes

    Your Integrative Life Compass

    10 questions, report emailed to you. Shows which systems are driving the rest, so you stop guessing which protocol to try next.

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  2. Entry

    Root Cause Snapshot

    A written read on your pattern from the intake you already filled out — what to investigate first, and what to stop paying for.

    See the Snapshot

  3. Most chosen

    DNA Precision

    200+ biomarkers plus your DNA, translated into a 90-day protocol with named brands and doses. Includes the INNSPO practice app.

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  4. Hands-on

    Private Concierge

    A standing clinical team on your case — reachable, proactive, and coordinating the whole family. For complex or multi-system cases.

    See how it works

Still unsure which rung? Book a call to get started with the doctors — they'll tell you if none of them fit.

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