Food Sensitivities & Allergies in San Diego, CA
At Thrive Wellness, food sensitivities are one of the most commonly overlooked drivers of chronic symptoms — from digestive discomfort and bloating to fatigue, joint pain, skin conditions, brain fog, and mood disturbances. Our San Diego, CA functional medicine team uses comprehensive food sensitivity testing and gut restoration protocols to identify your specific triggers and heal the underlying intestinal permeability that makes food sensitivity a persistent problem. Call (619) 984-4317 to get started.
Book OnlineThe Difference Between Food Allergy, Food Sensitivity, and Food Intolerance
These three terms are often used interchangeably but describe distinct physiological processes. Food allergies involve an immediate IgE-mediated immune response — hives, anaphylaxis, throat swelling — and are typically well-identified. Food sensitivities involve a delayed IgG or IgA-mediated immune response that can occur hours to days after consumption, producing a much wider range of symptoms that are difficult to connect to specific foods without testing. Food intolerances (like lactose intolerance) involve enzyme deficiencies rather than immune responses.
At Thrive Wellness, we focus primarily on food sensitivities — the most common and most frequently missed category. Delayed reactions make food sensitivities particularly difficult to identify without testing, and their wide range of manifestations means they are frequently attributed to other conditions. Many patients at Thrive Wellness who have been struggling with IBS, fatigue, headaches, eczema, or joint pain for years discover through food sensitivity testing that a handful of specific foods have been perpetuating their symptoms all along.
Symptoms That May Indicate Food Sensitivities
- Chronic bloating, gas, and digestive discomfort
- IBS-type symptoms (alternating constipation and diarrhea)
- Persistent fatigue not explained by sleep quality
- Brain fog and difficulty concentrating
- Headaches and migraines
- Joint and muscle pain
- Skin conditions (eczema, psoriasis, acne, rashes)
- Mood disturbances and anxiety
- Sinus congestion and post-nasal drip
- Dark circles under the eyes
How Thrive Wellness Tests and Treats Food Sensitivities
Functional Medicine Testing: At Thrive Wellness, food sensitivity testing is ordered as part of a comprehensive gut health workup and interpreted alongside stool analysis and clinical history to identify the most clinically relevant findings. We assess IgG and IgA reactions to a broad panel of common foods and guide patients through a structured elimination and reintroduction protocol based on results. Learn more on our Functional Medicine page.
Gut Healing Protocols: Food sensitivities don’t develop in healthy guts — they develop in guts with compromised intestinal permeability that allows food proteins to interact with the immune system inappropriately. Eliminating trigger foods produces symptom relief, but healing the leaky gut that caused the sensitivity is what prevents new sensitivities from developing and allows previously reactive foods to eventually be reintroduced. Our gut healing protocols at Thrive Wellness are designed to do both.
Acupuncture: Acupuncture supports immune regulation and reduces the systemic inflammation that amplifies food sensitivity reactions. For patients with significant gut-brain axis involvement in their food sensitivity symptoms — including anxiety, brain fog, and mood effects — acupuncture provides meaningful nervous system support throughout the dietary transition period.
Food Sensitivities & Allergies FAQs
How are food sensitivities different from food allergies?
Food allergies produce an immediate IgE-mediated immune response — hives, swelling, anaphylaxis. Food sensitivities involve delayed IgG or IgA immune reactions occurring hours to days after consumption, producing subtler but wide-ranging symptoms including digestive issues, fatigue, brain fog, headaches, joint pain, and skin changes. At Thrive Wellness in San Diego, CA , we test for IgG and IgA food sensitivities as part of our comprehensive gut health assessment.
Can food sensitivities cause fatigue and brain fog?
Yes — food sensitivity reactions trigger systemic inflammatory responses that directly affect energy production and cognitive function. Many patients at Thrive Wellness who identify and eliminate their specific food sensitivities report dramatic improvements in fatigue and mental clarity that they hadn’t been able to achieve through other interventions.
Do I need to avoid reactive foods forever?
In most cases, no — the goal at Thrive Wellness is to eliminate reactive foods during the gut healing process, then successfully reintroduce them once intestinal permeability is repaired. How long elimination is required depends on the degree of sensitivity and how quickly your gut heals. Some foods (like gluten for patients with autoimmune conditions) may require longer-term avoidance, but most sensitivities resolve over time with proper gut restoration.
What is leaky gut and how does it cause food sensitivities?
Leaky gut (intestinal hyperpermeability) occurs when the tight junctions between intestinal cells are compromised, allowing incompletely digested food proteins to pass into the bloodstream. The immune system treats these proteins as foreign invaders and mounts an inflammatory response — which over time becomes the pattern of chronic food sensitivity. Healing the gut barrier is the most important step in resolving food sensitivities long-term.
Are food sensitivity treatments at Thrive Wellness covered by HSA or FSA?
Yes — functional medicine consultations and acupuncture at Thrive Wellness are covered by HSA and FSA accounts. Call (619) 984-4317 for a free initial telehealth consultation and to learn about our discounted follow-up packages in San Diego, CA .