What does a breath test cost?

Between 195 and 369 dollars across the five tests we track, verified against each provider's own page on the date shown beside every figure. The spread is mostly about how many gases the test can measure.

What does the prescription cost without insurance?

Cash prices commonly quoted in the United States for a two week course run in the region of 2,200 to 2,940 dollars. That single number explains most of the search behaviour in this entire subject.

Why do people need more than one round?

Because non-response and recurrence are both common. That is a widely reported pattern rather than an unusual outcome, and it is worth knowing before you budget for a single course.

Is the cheaper test a saving?

Only if it can answer your question. A two gas test cannot detect hydrogen sulfide, so if that is part of what you are asking, the cheaper test costs less and answers less. Buying twice is the expensive outcome.

Do you earn anything from these figures?

No. No affiliate programme on this site is live and no commercial link renders anywhere on it. The two most useful products we cover have no affiliate programme at all, which means our most useful recommendation is also our least profitable one.

What this actually costs

By B. Gray Randolph · Updated August 5, 2026

Money is the missing variable in almost every article on this subject, and it is the one driving most of the reading.

The number that explains the whole niche

A two week course of the standard prescription commonly runs 2,200 to 2,940 dollars cash in the United States without insurance coverage. That figure, more than any clinical argument, is why people search for alternatives. An article recommending herbal options that does not mention it is hiding the reason its reader arrived.

We think saying this plainly matters, because it reframes what a comparison between the prescription and an herbal alternative actually is. It is not primarily a clinical comparison. It is a comparison between a well-documented expensive option and a poorly documented cheap one, and pretending otherwise flatters everybody involved.

Testing

Test	Hydrogen	Methane	Hydrogen sulfide	Price	Prescription
trio-smartGemelli Biotech	Yes	Yes	Yes	$349–369verified 2026-08-03	No
SIBO 2-hour / 3-hourGenova Diagnostics	Yes	Yes	No	$225–349verified 2026-08-03	Yes
SIBO breath testCommonwealth Diagnostics International	Yes	Yes	No	$295verified 2026-08-03	Yes
QuinTron breath testQuinTron / breathtests.com	Yes	Yes	No	$195–249verified 2026-08-03	No
SIBO breath testAerodiagnostics	Yes	Yes	No	$299verified 2026-08-03	Yes

Prices verified on the date shown against each provider’s own page. A price without a date is a claim about today made from memory.

What each test cannot tell you

trio-smart: Measures three gases but cannot tell you what to do about the result. There is no validated hydrogen sulfide threshold in any published guideline; the North American Consensus contains no H2S criterion at all. A number without a threshold is not a diagnosis.
SIBO 2-hour / 3-hour: Does not measure hydrogen sulfide. Infers it from a third-hour flatline, which is an unvalidated inference rather than a measurement. A negative result does not rule out hydrogen sulfide overgrowth.
SIBO breath test: Does not measure hydrogen sulfide, and says so plainly on its own site.Their own site: “no diagnostic technology on the market can test for H2S at levels of parts per billion”
QuinTron breath test: Does not measure hydrogen sulfide. Direct to consumer with no clinician required, which also means no clinician interprets the result for you.
SIBO breath test: Does not measure hydrogen sulfide. We do not link directly to their storefront; order through a clinician or the provider's main site.

Not a SIBO test

These devices come up constantly in the same conversations. They measure something real. They do not answer the same question, and we do not list them above because doing so would imply they do.

FoodMarble AIRE 2 $269 (verified 2026-08-03): A personal fermentation tracker, not a diagnostic test. No CLIA lab, no timed consensus protocol, no clinician report. It measures your breath after meals you choose, which answers a different question from a standardised substrate challenge.

Prices range from 195 to 369 dollars across the five tests we track, and the spread is mostly about how many gases a test can measure. Every figure above reads from the same data file the rest of the site reads, and renders the date it was verified, so a price here cannot quietly disagree with a price on another page.

The cheaper test is only a saving if it can answer your question. A two gas test cannot detect hydrogen sulfide. If that is part of what you are asking, buying the cheaper one and then buying again is the expensive path.

Repeat rounds

Non-response and recurrence are both commonly reported, so a single course is frequently not the whole cost. We are not going to put a number on how many rounds people need, because the honest answer is that it varies and the published evidence is thin. Budget for the possibility rather than for the best case.

Pimentel M et al., American Journal of Gastroenterology 2020 Clinical guideline

The guideline covering this rates five of six recommendations as resting on very low quality evidence, which is worth holding alongside any cost you are being quoted for a protocol built on it.

What is not settled here

We cannot tell you what your insurance will cover, what a compounding pharmacy near you charges, or whether a given clinic's package price is reasonable. Those vary enormously and any site quoting one national number for them is guessing. What we can do is show you the list prices we verified and the date we checked.

What we earn from this page

Nothing. No affiliate programme on this site is live and no commercial link renders anywhere on it. The breath test that measures all three gases has no affiliate programme at all, and neither does the device we tell people is not a SIBO test.

That is worth stating on the cost page specifically, because a page about money is exactly where you should ask who is being paid.

Common questions

What does a breath test cost?: Between 195 and 369 dollars across the five tests we track, verified against each provider's own page on the date shown beside every figure. The spread is mostly about how many gases the test can measure.
What does the prescription cost without insurance?: Cash prices commonly quoted in the United States for a two week course run in the region of 2,200 to 2,940 dollars. That single number explains most of the search behaviour in this entire subject.
Why do people need more than one round?: Because non-response and recurrence are both common. That is a widely reported pattern rather than an unusual outcome, and it is worth knowing before you budget for a single course.
Is the cheaper test a saving?: Only if it can answer your question. A two gas test cannot detect hydrogen sulfide, so if that is part of what you are asking, the cheaper test costs less and answers less. Buying twice is the expensive outcome.
Do you earn anything from these figures?: No. No affiliate programme on this site is live and no commercial link renders anywhere on it. The two most useful products we cover have no affiliate programme at all, which means our most useful recommendation is also our least profitable one.