How to choose functional labs for gut health: GI-MAP, OAT, DUTCH and HTMA

Most women who come to me have a folder of results. A normal CBC. A normal thyroid panel. Sometimes a normal calprotectin, sometimes a SIBO breath test that came back positive, got treated, and was positive again six months later. Nothing in that folder explains why she is bloated by 4pm, why she goes three days without a bowel movement, or why she is afraid of restaurant food.

So when she asks which functional test to order, my honest answer is that the test is the second question. The first one is: what do you need to know that you don't already know?

What conventional testing is good at, and what it never measures

Conventional GI testing answers disease questions well. Fecal calprotectin and lactoferrin separate inflammatory bowel disease from IBS. tTG-IgA with total IgA screens for celiac. A stool antigen or urea breath test finds active H. pylori. Those tests are worth doing and I want them done first, because if one comes back positive the whole plan changes.

What they don't measure is the terrain. They can't tell you whether your stomach acid is low enough that protein sits in your stomach for hours. Whether your gallbladder is releasing bile, or whether bile is thick and sluggish. Whether your migrating motor complex is firing between meals, which is the difference between a gut that clears itself and one where bacteria and food debris park. Whether your minerals are where they need to be for any of that to happen. A normal result means no disease was found. It does not mean the system is working.

That gap is why I run four labs, and why I run them in this order.

GI-MAP: the gut itself

GI-MAP is a stool PCR panel. It reads pathogens with real precision, including H. pylori and its virulence factors, C. difficile toxins, parasites and opportunistic bacteria. It reads your commensal balance, so I can see whether you have the bacteria that make butyrate. It reads secretory IgA, the mucosal immune marker I care about most, because low sIgA means the lining has no local defense and high sIgA means it is fighting something. And it reads function: pancreatic elastase for exocrine output, calprotectin for inflammation, occult blood, fat malabsorption.

What it doesn't do is diagnose "dysbiosis" in a way that tells you to kill something. Finding DNA from an organism does not prove it is causing your symptoms. I read GI-MAP alongside your symptoms, never instead of them. If elastase is low, no herbal antimicrobial will fix your bloating, because you are not digesting fat.

OAT: the environment your gut lives in

The organic acids test is a urine panel, and it tells me whether the terrain is hospitable. Fungal metabolites like arabinose show whether candida is a real factor or something a previous practitioner guessed at. Bacterial dysbiosis markers, oxalate and glycolate, quinolinic acid and HPHPA show what your bacteria are producing and whether those products are reaching your nervous system. I also read B12 and folate need, glutathione status and mitochondrial markers, because a gut that can't make energy can't repair itself.

DUTCH: hormones, which your gut is part of

DUTCH reads hormone metabolites from dried urine, and it matters for digestion more than most women expect. The cortisol curve and cortisone conversion tell me how your nervous system is running your gut, which is tied directly to motility and to whether the lining stays tight. Estrogen metabolites, the 2, 4 and 16 pathways, plus DHEA-S and testosterone, tell me about the estrobolome. Gut bacteria metabolize estrogen. When that cycle is off you get the constipation that tracks with your cycle, the bloating that is worse in the luteal phase, and the skin and mood shifts that come with it.

HTMA: the minerals that run the machine

Hair tissue mineral analysis gives me tissue-level mineral status over roughly three months: magnesium, zinc and copper, calcium and magnesium ratio, sodium and potassium ratio as a read on adrenal and nervous system load, and heavy metal exposure. This is the panel that decides sequencing for me. Magnesium and zinc are required for stomach acid production, for enzyme function and for motility. If they are low, we are not doing a kill phase. We are not doing anything until the system has what it needs to move.

Why the order matters more than the panel

You can order all four tests, take the results and still get nowhere, because results are not a protocol. What I build is a Root Cause Map, and it puts drainage, stomach acid and bile, motility, minerals, nervous system and gut lining ahead of anything that kills. If you kill bacteria in a gut that isn't draining, isn't moving and has no mucosal defense, the overgrowth comes back, and you are back at the same breath test six months later wondering what you did wrong. You did nothing wrong. You went out of order.

What I don't order, and why

I don't order IgG food sensitivity panels. Food reactions come from a permeable gut lining, not from the foods themselves, and a list of 40 foods to avoid makes the lining worse. I also don't use a lab to build an elimination diet. The point of these four panels is to find out what is driving the permeability, so you can eat more, not less.

How this works in the Gut Revival Method

Every client in the Gut Revival Method runs GI-MAP, OAT, DUTCH and HTMA, about $1,800 of testing, and we build the Root Cause Map together on a 90 minute results call. From there it is a phased protocol across diet, rest, exercise, stress and supplements, with food reintroduction as the goal, not the risk. At the end we retest and wean you off the supplements. Six months, and the measure of success is boring: a complete, unassisted bowel movement every day and at least 80% less bloating, or the service fee comes back to you.

If you have normal results and symptoms that won't move, start with the free Root Cause Assessment at myrootcause.satorihealth.co, or book a Root Cause Audit call and we will go through what you have already tried.