Digestive & Immune

Food Sensitivities Treatment in Greenville, SC

Food sensitivity testing and treatment in Greenville, SC. Dr. Hendry identifies hidden food reactions driving your chronic symptoms. Call (864) 365-6156.

What Is Food Sensitivities?

Food sensitivities (also called food intolerances or non-IgE food reactions) are delayed immune reactions to specific foods that produce a wide range of symptoms — typically appearing 2–72 hours after consumption, making the connection to specific foods very difficult to identify without systematic testing. Unlike true food allergies (IgE-mediated, immediate reactions), food sensitivities involve IgG antibodies, T-cell mediated reactions, and direct intestinal permeability effects, producing chronic, diffuse symptoms rather than acute reactions.

Common Symptoms

Digestive symptoms — bloating, gas, cramping, diarrhea, or constipation after eating
Brain fog and cognitive sluggishness after meals
Fatigue, particularly post-meal fatigue
Skin symptoms — eczema, hives, acne, and rashes
Joint pain that varies with diet
Headaches and migraines with dietary pattern correlation
Mood symptoms — anxiety, depression, or irritability linked to food intake
Chronic sinusitis, nasal congestion, and post-nasal drip

Root Causes: A Functional Medicine Perspective

Food sensitivities develop when intestinal permeability allows partially digested food proteins to enter the bloodstream, where they stimulate immune responses. Once sensitized, the immune system reacts to those proteins with each subsequent exposure, generating inflammatory mediators that cause symptoms in various organ systems.

The most common food sensitivity triggers are: gluten, dairy, eggs, soy, corn, nightshades, and high-FODMAP foods. Gluten sensitivity (non-celiac) is increasingly recognized as a real and prevalent condition distinct from celiac disease, capable of causing neurological, gastrointestinal, and systemic symptoms. Healing the underlying intestinal permeability — not just avoiding trigger foods — is essential for long-term recovery.

How We Treat Food Sensitivities at IHP

Dr. Hendry uses a systematic elimination and reintroduction protocol as the gold-standard approach to food sensitivity identification. IgG food sensitivity testing provides a useful guide for the elimination phase, though elimination-challenge remains the definitive diagnostic tool. The elimination diet is followed for 30–60 days (long enough for immune reactivity to clear) before systematic reintroduction of one food every 3 days.

Concurrently, the gut is healed through a 5R protocol: Remove irritants, Replace digestive factors, Reinoculate the microbiome, Repair the gut lining, and Rebalance lifestyle factors. This protocol addresses the root cause — intestinal permeability — rather than simply avoiding trigger foods indefinitely.

Dr. Hendry's Approach

Dr. Hendry provides detailed, practical guidance through the elimination and reintroduction process — a protocol that is simple in concept but requires clear instruction to execute effectively. He monitors patient response, adjusts the protocol based on findings, and ensures adequate nutritional intake throughout the elimination period.

Treatments We Use for Food Sensitivities

Frequently Asked Questions About Food Sensitivities

Food allergies are immediate (minutes after eating), IgE-mediated, and can cause life-threatening anaphylaxis. Food sensitivities are delayed (hours to days), IgG-mediated or permeability-driven, and cause chronic inflammatory symptoms rather than acute reactions. Standard allergy tests don't detect food sensitivities.
IgG testing identifies foods generating immune responses but doesn't definitively prove clinical sensitivity — some IgG reactions represent benign exposure. It is most useful as a guide for the elimination protocol. Elimination-challenge testing is the definitive approach to confirming clinical food sensitivities.
Not necessarily forever. Once the gut lining is healed and intestinal permeability is restored, many patients can tolerate previously reactive foods in rotation without symptoms. The goal is gut healing, not lifelong dietary restriction.
Yes. Eczema, psoriasis, acne, and rosacea all have documented food sensitivity and gut permeability connections. The skin is often the most visible manifestation of internal inflammation driven by food reactions.
Gluten and dairy are the most common. Gluten sensitivity (non-celiac) can cause neurological symptoms, joint pain, digestive problems, and skin issues. Dairy sensitivity often involves both lactose intolerance (enzymatic) and casein immune reactivity (immunological) — these require different management approaches.

Related Conditions