Can I order this test on its own?

Most labs can be ordered on their own with the “Lab Only” option, which includes a general results review. If you’d like your results personally reviewed — with a written Root Cause Report and personalized 12-week protocol — explore the 12-Week Program. Either way, add Tiffeny Parker as your practitioner when you register your kit so I can see your results.

Is this a medical diagnosis?

No. Functional lab testing is educational and is used to guide nutrition, lifestyle, and supplement strategy. It does not diagnose, treat, or cure any disease. Always work with your licensed healthcare provider for medical concerns.

How long do results take?

Most kits are collected at home in a single day and returned by prepaid mail. Results typically take about 2–4 weeks, depending on the panel.

Gut Health Testing

Leaky Gut Test

Also known as: Zonulin (intestinal permeability marker)

A stool marker of gut-lining permeability.

StoolAt-home collection kit

How to get this lab ↓

Zonulin regulates the tight junctions between cells lining your intestine. Elevated levels are associated with increased intestinal permeability, which can let food proteins and microbial by-products into circulation and drive inflammation and food reactions.

What it measures

Gut Barrier

ZonulinHigher levels are associated with a more permeable gut lining.

Who this is for

Helpful when food reactions, skin flares, and inflammation seem to stack up together.

Multiple food sensitivities
Bloating
Skin flares
Joint aches
Autoimmune tendencies
Fatigue

Two ways to get the Leaky Gut Test

Lab Only

Available to program members — ordered and reviewed by Tiffeny.

Personalized with Tiffeny

Recommended

Want your results personally reviewed?

One-on-one interpretation of your results
Written Root Cause Report
Personalized 12-week protocol

✦ Members receive exclusive pricing on multi-lab orders. See member perks →

Labs are processed by a CLIA-certified laboratory partner. To protect your privacy, I can only see your results if you add Tiffeny Parker as your practitioner.

Questions about your lab? Send a message →

What results can reveal

Increased gut permeability
A possible driver of food reactions and inflammation

How we interpret it

We read every panel through a functional lens — optimal reference ranges, ratios, and cross-panel patterns. Results become part of your written Root Cause Report and your personalized 12-week protocol.

If zonulin is high, gut-lining repair comes early in your protocol — a healthier gut barrier also means better mineral absorption.

Often paired with

Food Sensitivity IgG Test

Delayed reactions to 190 common foods, plus Candida and yeast.

Gut Bacteria & Parasite Test

Bacteria, yeast, parasites, H. pylori, digestion, and gut inflammation.

Advanced Gut Microbiome Test

DNA-based stool testing for a deeper look at gut pathogens, microbiome balance, and digestion.

Common questions

Not sure which panels you need?

Start with the Root-Cause Fit Assessment. Takes about 3–5 minutes. If it looks like we're a good fit, you'll be invited to schedule a 45-minute consultation to discuss your health history, goals, and whether this program is the right next step for you.

Educational information only. Functional lab testing is not intended to diagnose, treat, cure, or prevent any disease. Results are reviewed in the context of your full health history.