Why does my stomach react to foods that don't seem to bother most people?

The same meal lands differently on different stomachs. Here is how your DNA shapes your reaction to gluten, dairy, spice, FODMAPs, and stress, and what actually helps.

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Built on cited and peer-reviewed genetic studies. Every answer is drawn from published genetic research, with all sources available.

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The question

One Table, Several Stories

Everyone at the table ate the same thing, and only you paid for it afterward. It is easy to treat that as one mystery, a generally sensitive stomach that needs to be managed around.

It is usually several different, mostly separate stories layered on top of each other. Whether milk sits fine often comes down to one enzyme. Reacting to gluten can trace to a specific inherited immune marker, or to a fermentable carbohydrate in wheat that has nothing to do with gluten itself. Onions, garlic, and beans ferment in everyone, what differs is how loudly your gut reacts. Spice runs on its own separate dial, and so does how directly stress reaches your stomach.

None of this is decided by genetics alone. Sleep, stress, gut bacteria, and what a food is paired with all matter too. Your genes tilt the odds on each of these separate stories, they do not decide the result.

A real answer, not raw data

Every finding is written as three plain parts: what your result is, why it matters, and what to try. No jargon, no allele soup, just your own why.

Built from many studies

No single trial answers this whole question. We assemble it from published, verifiable research, and match every finding to your own DNA.

Clues, not destiny

Your genes tilt the odds; your habits decide the result. The report shows the genetic friction™ you’re working against so the work gets clearer.

Genetic Friction™ is how much your DNA works against you on one thing you are trying to change. A little means the habit is easy to hold. A lot means your routine has to do more of the work. Your report shows where you land on a five-step scale.

Your starting point

It all starts with your DNA

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Using a DNA file from another company? We are agnostic to the source and will test whatever you have. If you do not have your DNA file yet, we will guide you to get it from the other company. We will take up to 3 separate DNA files, because combining across sources can give you better coverage. Some DNA files fall short, and we tell you before we build anything. We review them with our rigorous 12-step process, and we only deliver your report if your DNA files can produce a reliable one. If they cannot, you choose a full credit toward a report we can produce or toward our DNA Blood Test, or a full refund.

*Limited time only. The file processing fee (our rigorous 12-step review of your DNA file) is waived and the DNA Blood Test is $50 off when ordered with any Answer Report. Offer ends 11/15/2026.

See it in action

One report, two very different answers

Every page is written for a person, not a lab. Here are real pages, tied to a private ID rather than a name.

The same report, two very different starting points

One person's initial answer, read from their DNA
One person's initial answer, read from their DNA
A very different person's
A very different person's

Gut and Digestion

Same report, two customers

Gut and Digestion, Customer A
Customer A has pronounced genetic friction with dairy, spice, bloating and gas, and sucrose, and moderate friction in the other three gut areas. Each one has a specific, practical fix.
Gut and Digestion, Customer B
Customer B has negligible genetic friction in all seven gut areas. Same dinner, very different result.
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What you get

What’s inside your report

A personalized, plain-language answer to one question that has nagged at you for years, built from your own DNA and organized so you can act on it.

✓
Your personal answerAn opening read of how your DNA lines up, with your strengths and challenges at a glance.
✓
What your DNA showsThe genetic findings behind this question, each written plainly for you.
✓
Why it mattersHow each finding feeds the bigger question you asked.
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What to tryConcrete, realistic next steps, small enough to actually keep.
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The levers you controlWhere your habits, not your genes, decide the outcome.
✓
Plain-language throughoutNo jargon, no allele soup, just your own why.
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Easy to read

Every finding, in three plain parts

No genetics degree required. Each result on every page follows the same simple shape, so you always know what it means and what to try.

Your results

What your own DNA says here, written plainly and compared to how a different result would play out.

Why it matters

How this piece feeds the bigger question you asked: Why does my stomach react to foods that don't seem to bother most people?

What to try

A concrete, realistic next step, small enough to actually keep, that may improve your success.

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The process

How it works

Three steps from your DNA to an answer you can actually use.

1

We read your DNA

From one blood draw, we read about 1.9 million common spots in your DNA, focused on the ones studied in metabolism and nutrition.

2

We build your proprietary scores

Our own method combines many studies into one score for each area, built from your own DNA, rather than relying on one quirky marker.

3

We deliver your personalized report to you

A plain-language answer, organized so every finding tells you what it is, why it matters, and what to try next with your provider.

Good to know

Frequently asked questions

What does this report actually tell me?

This report is personalized to your DNA, and answers the question just for you.

Does my DNA decide my weight?

No. Your genes tilt the odds; your habits, movement, and sleep decide the result. Knowing the genetic friction™ you’re working against simply makes the work clearer and the wins easier to hold onto.

Is this a diagnosis or medical advice?

No. This is a wellness report, not a medical diagnosis, and it has not been reviewed by the FDA. It’s written to bring to your own healthcare provider.

Do I need a blood draw?

No, not if you already have a DNA file from another service. Upload it and, if it can produce a reliable report, we build it from that. Some DNA files fall short, so we check yours first and tell you before we build anything. If you do not have one, we recommend our blood (not saliva) based DNA Blood Test: one blood draw gives us the deepest read of your DNA without the much higher cost ($500-$5,000) of running your whole genome, and one sample covers all of your Answer Reports. Already had your blood drawn with us? You’re all set.

How long until I get my report?

If you upload a DNA file you already have, we confirm that it covers this report and your report follows, all within 48 hours (usually faster). If you use our DNA Blood Test instead, that is one blood draw and about 6 to 8 weeks, and the single draw powers every future report.

Will my report change over time?

Genetics is a fast-moving field. If a study is ever published that directly answers one of these questions, we assess it and incorporate the findings into a new version of the report, so your information can stay current without you tracking the literature.

Finally understand your own why

Turn your DNA into a plain-language answer to the question that has nagged at you for years, and a short list of what to try.

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Learn more about the genes behind your report at IntrinsicGenomics.com/Genes

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About the DNA. Our DNA Blood Test is $149.00*, paid once. One blood draw at a Labcorp location covers every Answer Report you will ever order. Already have a raw DNA file from another company? Upload it instead, and we will tell you plainly what it can power. The file processing fee, our rigorous 12-step review of your DNA file, is $50 Free*. See how our 12-step file review works.

*Offer ends 11/15/2026. $50 off the DNA Blood Test when ordered with any Answer Report.