LPR & Silent Reflux Relief in Canada
Hoarseness, constant throat clearing, a lump in your throat, chronic cough — with no heartburn at all. That pattern has a name, and a barrier-based approach that is studied for it. OBEX was developed by a Canadian ENT surgeon and laryngologist.
Reflux That Skips the Heartburn
Laryngopharyngeal reflux (LPR) — often called silent reflux — happens when stomach contents travel past the esophagus and reach your throat and voice box. The tissues there have almost none of the esophagus’s natural defences, so even brief, small exposures irritate them.
Common signs include:
- Hoarseness or a rough voice, often worst in the morning
- Constant throat clearing or excess mucus
- A lump-in-the-throat sensation (globus)
- Chronic cough that has no clear respiratory cause
- Vocal fatigue — your voice wears out as the day goes on
Because up to half of people with LPR never feel classic heartburn, it routinely goes unrecognized — or gets treated with approaches designed for a different problem.
Why a Physical Barrier Fits the LPR Problem
Acid-blocking pills (PPIs) make stomach contents less acidic, but they do not stop reflux from physically happening. Throat tissue can be irritated by pepsin — a stomach enzyme — and by weakly acidic reflux, so “less acid” often is not enough for throat symptoms.
Alginate therapy targets the mechanics instead. Sodium alginate reacts with stomach acid to form a floating gel raft that caps the post-meal acid pocket and physically impedes stomach contents from escaping upward toward the throat. That mechanism is why alginates have been evaluated in clinical studies of LPR specifically — you can review the evidence on our research page.
Built by a Laryngologist
OBEX was developed in Hamilton, Ontario by a team led by an ENT surgeon and laryngologist — a physician whose clinical practice centres on voices and throats — together with a speech-language pathologist specializing in voice and swallowing, plus food science and culinary leads. LPR is not a side interest for this team; it is the problem OBEX was designed around. Read more about the founding team.
For Singers and Professional Voice Users
If you sing, teach, act, podcast, or talk for a living, LPR is a career issue: morning hoarseness, a narrowed range, and vocal fatigue all trace back to overnight reflux irritating the vocal folds. Voice professionals are among the most common LPR patients in any laryngology clinic.
A barrier approach is attractive here because it is drug-free and works at the source: a dose after dinner and before bed helps keep stomach contents where they belong while you sleep, so your voice starts the day where you left it. OBEX’s chef-crafted flavours use natural flavour oils — no citric acid, and no real mint leaf compounds that relax the esophageal valve.
LPR & Silent Reflux Questions, Answered
What is LPR (silent reflux)?
Laryngopharyngeal reflux (LPR) happens when stomach contents travel all the way up past the esophagus to the throat and voice box. Because the throat is far more sensitive than the esophagus, even small amounts cause symptoms — hoarseness, throat clearing, a lump-in-the-throat feeling, chronic cough — often without any classic heartburn. That is why it is called silent reflux.
Why is alginate therapy studied for LPR?
Alginates form a physical raft on top of stomach contents and cap the post-meal acid pocket, which helps block the upward escape of refluxate — including the small, often non-acidic volumes that irritate the throat. Because LPR is driven by material physically reaching the throat rather than by acid in the esophagus alone, a barrier approach is a natural fit, and alginates have been evaluated in LPR clinical studies.
Why do acid-blocking pills often disappoint for LPR?
PPIs reduce how acidic your stomach contents are, but they do not stop reflux from physically happening. The throat can be irritated by pepsin and even weakly acidic reflux, so making the refluxate less acidic does not always resolve throat symptoms. Alginate rafts target the mechanical problem instead. Many people use both together — talk to your provider about what fits your situation.
How do I know if my symptoms could be LPR?
The Reflux Symptom Index (RSI) is a clinically validated nine-question screening tool developed for exactly this purpose. You can take it free on our site in about two minutes. A score above 13 suggests reflux may be contributing to your throat symptoms and is worth discussing with your doctor.
When should I take OBEX for silent reflux?
Take 1 teaspoon (5 mL) within 30 minutes after meals and about an hour before bed. The bedtime dose matters for LPR in particular, since nighttime reflux reaching the throat is a common driver of morning hoarseness.
Start With Two Minutes, Not a Prescription
Take the clinically validated Reflux Symptom Index quiz to see whether reflux could be behind your throat symptoms — then try the alginate developed by a Canadian laryngology team.
These statements have not been evaluated by Health Canada. This product is not intended to diagnose, treat, cure, or prevent any disease. Persistent hoarseness or throat symptoms should be assessed by a physician.