What Is a GI-MAP Test? What It Shows and Who It's For

If you've been living with bloating, irregular digestion or a gut that reacts to everything, you've probably heard someone mention a GI-MAP. Maybe you were even told you have a "gut issue" and then sent home without a plan. A GI-MAP is one of the most useful tools I know for turning that vague answer into something specific you can act on.

The short answer

A GI-MAP is an at-home stool test made by Diagnostic Solutions Laboratory in Alpharetta, Georgia. GI-MAP stands for GI Microbial Assay Plus. It uses quantitative PCR, a method that reads the DNA of organisms in your sample, to show what is living in your gut and how much of it is there. It also measures markers of digestion, immune response and inflammation, all from a single sample you collect at home and mail in. Source

What a GI-MAP measures

The report is organized into a few main areas:

• Pathogens: bacteria, viruses and parasites that are known to cause digestive illness.
• H. pylori: whether it's present, plus virulence factors that help show how aggressive a strain may be.
• Normal and opportunistic bacteria: the balance between the helpful bacteria you want and the ones that can cause trouble when they overgrow.
• Fungi and yeast: including Candida.
• Parasites and worms: organisms that are easy to miss on other tests.
• Intestinal health markers: how well you're breaking down food (elastase and fat in the stool), signs of gut inflammation (calprotectin), the strength of your gut's immune lining (secretory IgA) and an enzyme tied to how your body clears estrogen (beta-glucuronidase).

Zonulin, a marker linked to intestinal permeability, and a few others can be added on separately.

How it's different from a standard stool test

A conventional stool test is usually ordered to rule out an active infection. That matters, and it's the right first step when someone is acutely sick. Because the GI-MAP reads DNA and reports amounts, it can show patterns of imbalance that don't rise to the level of infection but can still affect how you feel every day.

One marker on the GI-MAP does have strong backing in conventional medicine. A meta-analysis in the American Journal of Gastroenterology found that a calprotectin level of 40 μg/g or below meant a 1% or lower chance of inflammatory bowel disease in adults with IBS-type symptoms. Source Calprotectin is a protein released by white blood cells when the gut is inflamed, which is why it's useful for telling these conditions apart. Source

Who a GI-MAP may help

In my practice, a GI-MAP is most helpful when:

• Bloating, gas, constipation or loose stools have been going on for months.
• Your energy, skin or mood seem tied to how your gut feels.
• You've cleaned up your diet and still react to foods that never bothered you before.
• Hormone symptoms aren't improving, since the gut plays a role in how estrogen is cleared. (A DUTCH test is often its partner here.)
• You've tried probiotics or elimination diets without a clear result.

What a GI-MAP can't tell you

A GI-MAP doesn't diagnose disease on its own, and it isn't a replacement for care from your doctor or gastroenterologist. It's a snapshot of one moment in time, and results always need to be read alongside your symptoms and history. If you have red flags like blood in your stool, unexplained weight loss or severe pain, see your medical provider first.

What happens after the results

The report is only as good as the plan that follows it. When a client's GI-MAP comes back, we walk through it together and decide what matters most right now. Often that means supporting digestion, calming inflammation and rebuilding the gut lining before going after anything else. That order follows my Regulate, Repair, Reclaim approach, so your body has the stability it needs to respond.

Testing also works best on a solid foundation. Most clients start with my 8-Week Foundations Program, where we steady blood sugar, stress, sleep and digestion first. You can read more about how this fits with other tests in What Are Functional Medicine Labs?

Is a GI-MAP right for you?

If your gut has been running the show and you're tired of guessing, a GI-MAP can help answer what's actually going on. Start with a free 20-minute discovery session and we'll talk through whether it makes sense for you. I see clients in person in Tyler, Texas, and virtually anywhere.

This article is for education only and isn't medical advice. I'm a functional health coach and Integrative Health Practitioner, not a medical provider, and I don't diagnose or treat disease. Talk with your healthcare provider about any testing or treatment decisions.