Food Sensitivity Testing: What It Is, Who It Helps, and How We Use It

Jan 23
3 min read

Today we’re digging into one of our most useful tools for getting people feeling better, faster: food sensitivity testing. If you’ve tried “all the diets,” taken every supplement TikTok suggested, and still feel off—this is for you.

Allergy vs. Sensitivity (they are not the same)

Food allergy

Immune branch: IgE-mediated
Onset: immediate
Typical signs: hives, swelling, wheezing, anaphylaxis (think EpiPen, nut-free tables)

Food sensitivity / intolerance

Immune branch: commonly IgG-mediated (delayed immune response)
Onset: delayed—hours to 72 hours later
Typical signs: bloat, reflux, constipation or loose stools, headaches, brain fog, joint aches, fatigue, skin flares, weight that won’t budge

Allergies are acute and obvious. Sensitivities are sneaky and chronic—easy to miss until you quiet the noise and listen to your body.

Who should consider testing?

If any of these sound familiar, an IgG food sensitivity panel is worth it:

Autoimmune patterns (RA, IBD, psoriasis, thyroid autoimmunity), chronic joint or body pain
Headaches or migraines that don’t stay away
Digestive issues: reflux/heartburn, IBS symptoms, gas/bloat, constipation (less than 1 BM/day), or alternating stools
“Tired but wired,” brain fog, afternoon crashes
Weight-loss plateaus despite eating “clean”
Kids/teens with abdominal pain, mood swings, or irregular bowels

Quick gut check: “Regular” means 1–2 well-formed bowel movements daily (Bristol 3–4), ~6–12” total, without straining.

How our test works (simple finger-prick)

At-home or in-office finger-prick dried blood spot (we fill 5 small circles).
Lab analyzes IgG reactivity to a broad panel of foods.
Results are grouped low / moderate / high reactivity, plus hidden sources and special considerations (so you’re not playing label detective).

This isn’t about “gotchas.” It’s a map of where your immune system is getting poked so we can calm inflammation and let healing happen.

Why “the usuals” show up (and why variety matters)

Ever notice that the foods you eat daily—eggs, wheat, dairy, coffee—often light up your report?

Two big reasons:

Overexposure: Repeating the same foods can keep the immune system on simmer.
Gut permeability: A stressed gut lining lets partially digested food fragments interact with the immune system more often.

Solution: rotate your “food families” and eat the rainbow.

Example:

Night 1: chicken + broccoli + strawberries + arugula + pistachios
Night 2: grass-fed steak + cauliflower puree + asparagus + blueberries
Night 3: wild salmon + zucchini + citrus + pumpkin seeds

Different colors = different phytonutrients, fibers, and different digestive enzymes—which keeps your system resilient.

What happens when results come back

We review your report together and connect dots with your symptoms.
Elimination phase (customized):
- Low reactivity: typically 8–12 weeks
- Moderate reactivity: 12–16+ weeks
- High reactivity: 3–6 months (occasionally longer)
Supportive plan: simple rotation guide, grocery list, and swaps you’ll actually eat (plus gut/hepatic support when needed).
Real life: We strategize family meals, eating out, travel, and “non-negotiables” (hi, coffee) so you’re set up to win—not white-knuckle.

Stuck weight? Removing reactive foods often drops inflammation pounds first. We routinely see 5–20 lbs shift just by calming the immune load.

Reintroduction (the right way)

After your elimination window:

Reintroduce one food at a time in a normal portion.
Wait 72 hours before trying the next food (sensitivities can be delayed).
Track subtle signs: post-nasal drip, throat mucus, headache the next morning, gurgly belly, gas/bloat, stool changes, skin itch, joint stiffness, energy dips.

If it flares you, it’s a clear “not yet.” If it doesn’t, we’ll coach you on how often it’s wise to include.

Yeast came up… now what?

When yeast is reactive, your plan will flag alias names and common sources so you’re not ambushed:

Obvious: breads, baked goods, beer, vinegars
Less obvious: dried fruit, aged cheeses, mushrooms, truffles, condiments, some processed meats
And yes—sugars (all forms) feed yeast overgrowth

You’ll get a clean shopping list and swap guide so meals stay delicious, not depriving.

“I can’t give up ____.”

We get it. Our job is not to scold—it’s to partner. We’ll line up your goals (goodbye migraines? normal BMs? clear skin? steady energy?) with the one thing you don’t want to change. If symptoms remain after removing everything but that food… that’s your answer. You choose the outcome you want; we’ll support you all the way.

Why this works (the deeper gut picture)

When food lingers and ferments, it fuels the “bad guys,” singes the gut’s microvilli (the tiny enzyme-secreting brushes), and thins the intestinal barrier. Result: fewer enzymes, more permeability, more immune activation, more symptoms.

Calm the triggers → heal the lining → restore enzyme output → normalize motility → inflammation drops → you feel like you again.

Have a label you’re unsure about—or a kid who’s going 5 days between BMs? Send it our way. We’ll help you troubleshoot and map a next step that fits your life.