Skip to content
    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, IFMCPLast 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.

    Your Integrative Life Compass · Free

    By 3pm on a normal day, you feel…

    13 questions · 4 minutes · no email required

    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.

    See the Foundation Program

    It is complex — you need the map

    DNA Precision

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

    See DNA Precision

    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.

    Book a Call

    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.

    15 minutes · free · Member Services only (no sales pitch)

    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

    Stop guessing. Map the root cause.

    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

      13 questions, no email required. Shows which systems are driving the rest, so you stop guessing which protocol to try next.

      Find your root cause

    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.

      Start DNA Precision

    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 free 15-minute call with the Director of Member Services — they'll tell you if none of them fit.

    FIND YOUR ROOT CAUSE

    Not sure where to start?

    12 questions. Your archetype. The Pattern Web showing where the load actually lives across body, mind, relationship, family, and work. No email required.

    Stop guessing — decode the root cause

    DNA Precision · your genetic + biomarker roadmap