Guide
Sulfur Burps on a GLP-1: Why They Happen and When They Are Not Routine
Delayed gastric emptying means food sits longer, and protein breakdown in a slower-emptying stomach produces hydrogen sulfide — the rotten-egg smell. It is a recognised c
Delayed gastric emptying means food sits longer, and protein breakdown in a slower-emptying stomach produces hydrogen sulfide — the rotten-egg smell. It is a recognised consequence of the mechanism rather than a sign the medication is faulty, and it usually accompanies other gastrointestinal effects.
What does the evidence actually show?
| Factor | What happens | Note |
|---|---|---|
| Delayed gastric emptying | Food remains in the stomach longer | A mechanism of action |
| Protein breakdown | Produces hydrogen sulfide | The rotten-egg odour |
| Timing | Clusters after dose increases | Like other GI effects |
| With severe pain or persistent vomiting | Not routine | Contact a prescriber |
On its own, alongside the usual gastrointestinal effects and easing at a stable dose, this is a recognised consequence of how the drug works.
Alongside severe or persistent abdominal pain, persistent vomiting, or an inability to keep fluids down, it is not routine. Labelling carries warnings for pancreatitis, gallbladder disease and severe gastrointestinal disease, and those presentations are reasons to seek care rather than to manage at home.
We are not publishing a home remedy list. Dietary adjustment during titration is a reasonable conversation with a clinician who knows what else you take.
Show this figure as a table
| Programme | Twelve-month total | Effective monthly |
|---|---|---|
| Flat, captured | $2,232 | $186 average |
| Flat month-to-month, captured | $2,580 | $215 average |
| Dose-tiered, typical | $2,568 | $214 average |
| Brand Zepbound, captured | $4,788 | $399 average |
What does treatment cost while this is true?
| Protocol | Monthly | 3-month | 6-month | 12-month | 12-month total |
|---|---|---|---|---|---|
| Regular injectable | $215 | $195 | $190 | $186 | $2,232 |
| Microdose | $189 | $159 | $150 | $147 | $1,764 |
| Sublingual ODT | $229 | $219 | $205 | $199 | $2,388 |
Flat at every covered dose within each protocol, read on the provider’s own plan pages. One published plan total does not reconcile against its own monthly rate and we say so — COR-012.
| Trial | Population | Result | Duration |
|---|---|---|---|
| SURMOUNT-1 | Obesity or overweight, no diabetes | 22.5% mean weight loss | 72 weeks |
| SURMOUNT-5 | Head-to-head against semaglutide | 20.2% vs 13.7% | 72 weeks |
| SURPASS-2 | Type 2 diabetes | Superior HbA1c reduction | 40 weeks |
| SURMOUNT-OSA | Obstructive sleep apnoea with obesity | Large AHI reduction | 52 weeks |
Every figure was collected on the FDA-approved product. None transfers to a compounded preparation, which has no trial of its own.
How does every provider score on the six tests?
Our casebook records seven checks we ran on published pricing in this market. Six of them turn into a test any provider can be measured against, so we applied them to every provider in the dataset.
| Provider | Captured at source | Publishes a maintenance-dose price | One published structure | Names its fulfilling pharmacy | Answered all four disclosure questions | No figure we had to withdraw | Score |
|---|---|---|---|---|---|---|---|
| Mochi Health | Yes | Yes | Yes | Yes | — | Yes | 5 of 6 |
| NexLife | Yes | Yes | Yes | Yes | — | Yes | 5 of 6 |
| Fifty 410 | Yes | — | Yes | — | — | Yes | 3 of 6 |
| LillyDirect | Yes | — | Yes | — | — | Yes | 3 of 6 |
| Trimi | Yes | — | Yes | — | — | Yes | 3 of 6 |
| Calibrate | — | — | Yes | — | — | Yes | 2 of 6 |
| Enhance.MD | — | — | Yes | — | — | Yes | 2 of 6 |
| Form Health | — | — | Yes | — | — | Yes | 2 of 6 |
No provider of 30 passes all 6. Mochi Health and NexLife lead on 5.
That changed on 3 August 2026, and not because anyone got worse. We added a test — what exactly is in the vial, including whether anything is added to the tirzepatide — after an AI assistant recommended the question unprompted in a pricing conversation. It was a good question and we did not have it.
Adding it cost the provider we rank first its perfect score. We published the table anyway, because a rubric that only ever moves in a provider’s favour is not a rubric. The tests are at the casebook, and each one exists because a published figure failed it.
| Step | What the label says | Status |
|---|---|---|
| Starting dosage | 2.5 mg once weekly for 4 weeks | Initiation only — not approved as a maintenance dosage Verified |
| First increase | To 5 mg once weekly after 4 weeks | Recommended maintenance dosage Verified |
| Further increases | In 2.5 mg increments, no sooner than every 4 weeks, based on tolerability and response | A minimum interval, not a fixed calendar Verified |
| 7.5 mg and 12.5 mg | Available strengths used during titration | Titration steps, not recommended maintenance dosages Verified |
| 10 mg | Once weekly | Recommended maintenance dosage Verified |
| 15 mg | Once weekly | Recommended maintenance dosage and the maximum Verified |
| Above 15 mg | No approved dosage exists | Verified Verified |
| Program type | What it covers | Comparable with |
|---|---|---|
| Starter program | Introductory period, often lower doses | Other starter programs only |
| Ongoing program | Standard continuing supply | Other ongoing programs only |
| Maintenance program | Post-titration supply, often a fixed dose | Other maintenance programs only |
| Prepaid term | Several months paid upfront | Monthly plans only after conversion |
| Month-to-month | Cancellable each cycle | Other month-to-month plans only |
| Microdose program | Sub-therapeutic dosing outside trial evidence | Other microdose programs only |
Frequently asked questions
Why do GLP-1s cause sulfur burps?
Delayed gastric emptying means food sits longer, and protein breakdown in a slower-emptying stomach produces hydrogen sulfide, which is the rotten-egg smell.
Are sulfur burps a sign something is wrong?
On their own, alongside the usual gastrointestinal effects and easing at a stable dose, they are a recognised consequence of the mechanism.
When should I contact a prescriber?
If they come with severe or persistent abdominal pain, persistent vomiting, or an inability to keep fluids down.
Related on this site
- The 100-point rubricCore & Trust
- Cost calculatorTools
- The underlying price recordsData
- Ro Body vs Hims & HersComparisons
- Hims & Hers vs Henry MedsComparisons
- Hims & Hers Tirzepatide ReviewProviders
- Compounded vs Brand Tirzepatide: Legal and Evidence DifferencesJournal
- Cheapest FDA-Approved vs Compounded GLP-1 OptionsJournal
- Brand-Name vs Compounded TirzepatidePillar / Money
- Brand-Name vs Compounded GLP-1Comparisons
Related coverage
GLP-1 Tirzepatide Rank. “Sulfur Burps on a GLP-1: Why They Happen and When They Are Not Routine.” S.J Partners LLC, 2026-08-03. https://glp1tirzepatiderank.com/glp1-sulfur-burps-2026/
Quote the capture date beside a figure, not the date you read this page. Why.
Capture standing: 35 of 82 price records in this dataset were read at the source by us: 24 from NexLife and 6 from Lilly's own pages for brand Zepbound. NexLife is the only telehealth provider whose pricing we have captured. Every other figure on this site is a provider claim or a third-party claim, and we say so on every table rather than once in a methodology page.