Hydrogen-methane breath tests run on site for gastro clinics without the kit
TL;DR Exhalo brings a hydrogen-methane breath analyser and a trained technician to gastroenterology clinics in smaller cities on fixed days each week. Clinics pay per test or rent the slot, patients avoid a trip to a metro hospital, and the treating doctor gets a protocol-standard report to interpret.
Bloating, gas and loose stools fill a gastroenterologist's day, and a good chunk of those patients can't absorb certain sugars. In a 2026 Delhi case-control study, 29% of patients with functional bloating had fructose malabsorption against 3% of healthy controls, and 46% were methane producers[1]. A breath test can point to this, or to bacterial overgrowth, without endoscopy[2].
The test is simple but slow - about three hours of samples every 15–20 minutes[2]. Hospitals in large cities run it[3], yet a clinic in a tier-2 town rarely sees enough cases to justify an analyser and a trained person. An Asian expert monograph also found that protocols and interpretation vary from centre to centre, which makes results hard to compare[4].
What it does, in regulatory terms: a diagnostic test service using a licensed breath analyser. The treating doctor makes the diagnosis. The analyser is a medical device under CDSCO rules, so Exhalo buys only from a vendor with the right import or manufacturing licence[5].
Here's how it runs. A technician travels a weekly circuit of four to six clinics. Each clinic books patients into its Exhalo day. The technician prepares the patient, gives the sugar drink, collects breath samples on the standard schedule and logs symptoms. The report shows hydrogen and methane curves against the thresholds in published guidance, and the gastroenterologist interprets it.
The seed pitched AI that reads breath for early signs of disease in general, and I reframed it. Breath tests for cancer or TB are still in development in India, and one Kerala device is not expected on the market for two to three years, pending approvals[6]. The hydrogen-methane test is already accepted practice, so Exhalo starts there and earns trust before adding anything newer.
The patient pays, usually out of pocket, through the clinic. The clinic is the buyer, since it gets a test it can order without capital spend, plus a consultation follow-up. I couldn't find an Indian price list. In the US the test costs US$175–400 before insurance (about ₹16,900–38,700)[7], which is a ceiling and not a guide. Indian pricing has to be discovered with clinics in the first month.
CDSCO finalised its guidance on medical device software in July 2026, which clarifies how analyser software and reporting tools are classified[5]. The 2026 Asian monograph gives a shared protocol that a service like Exhalo can follow step by step[4]. Interest in gut health has also made patients more willing to ask for a cause, not just antacids.
There's no public figure for India's breath-testing market or test volume. The narrow signal is clinical - nearly a third of bloating patients in one Indian study had a malabsorption finding[1]. Treat that as evidence of need in a referral population, not as the share of all patients with gut complaints. Your real market number will be tests booked per clinic per month.
Large private hospital chains run the test in-house for their own patients[3]. An Irish startup sells a personal hydrogen breath device with an app and a section for clinicians[8]. A Kerala tech firm is building a handheld VOC breath screener that is not yet approved[6]. Nobody visible offers the test as a shared, travelling service to independent clinics in smaller cities.
| Difficulty | Moderate (41/100) |
| Starting capital | ₹40–75 L |
| Time to launch | 4–6 months |
The equipment is bought, not built. The hard part is routing, because a technician spends three hours per patient and so each clinic day has to fill four or more chairs. Getting gastroenterologists to change a referral habit also takes visits, data and a lot of patience.
Yes, in parts. You run a diagnostic service on a regulated device.
Building this outside India? The categories above usually have a local equivalent, so check with your own regulator.
Don't let AI interpret a curve as a diagnosis. The doctor makes that call, and any software that does more than summarise may become medical device software.
Want to work out the AI layer for Exhalo? Talk to Yash →
I like this as a small, practical services business for a founder with lab-operations or medical-sales experience. It is not a deep-tech play, so if you want to build an AI breath sensor then look elsewhere. Prove one number first - six booked tests per clinic per visit across five clinics, sustained for six weeks.
Plan for roughly ₹40–75 L for analysers, technicians and early operations.
Use only CDSCO-licensed analysers, check clinical establishment registration in your state, and follow the DPDP Act for patient data.
Yes, wherever gastro clinics lack the equipment. Check local device and clinic registration rules first. My advice is to run a small paid pilot with a few real customers before you commit the full budget.
The free Exhalo validation kit has the line-by-line capital breakdown, the effort scoring, the device and data-protection checklist, a 14-day validation sprint with pass/fail targets, a 90-day launch plan, 10 interview questions for gastroenterologists and clinic owners, and 5 assumptions to test. Download the kit →
Thinking about building Exhalo or something close to it? The make-or-break work is filling every technician day with enough booked patients, and that's the kind of thing I help founders work out. If you need a hand, you know where to find me. Talk to Yash →
For illustration only. Names are fictional and ideas hypothetical; sourced facts are real but may be out of date. Nothing here is legal, financial or professional advice, and Yash Khatri is not personally liable for any use of it. Read the full disclaimer.