Abrasiones

Alginic acid is the free-acid form of alginate used in raft-forming antireflux therapy. It forms a floating polymer gel in the stomach that physically blocks acid reflux into the esophagus. A PMC review (PMC6836317) extensively documents its mechanism and supporting clinical evidence. A meta-analysis of 14 RCTs (n=2,095) supports alginate-class efficacy for GERD symptom resolution. The 2025 MDPI GERD review validates alginic acid as having clinical evidence for GERD management.

A 2015 pilot RCT (n=79) compared aloe vera gel syrup (10 mL/day) to omeprazole and ranitidine over 4 weeks, finding it reduced all eight assessed GERD symptoms with no adverse events requiring withdrawal, with efficacy comparable to standard drugs. A 2021 review of five clinical studies concluded aloe vera gel syrup consistently reduced GERD symptoms. Mechanisms include reduction of gastric acid secretion, anti-inflammatory cytokine modulation, and mucosal protection by polysaccharides.

Artichoke leaf extract (ALE) has been shown in clinical trials to reduce upper gastrointestinal symptoms including heartburn and epigastric discomfort. A 6-week RCT in 247 patients with functional dyspepsia demonstrated significantly greater overall symptom improvement with ALE (960 mg/day) versus placebo. Post-marketing surveillance studies with 320–640 mg three times daily reported nausea, abdominal pain, and fullness resolved in over 70% of patients. Choleretic action—stimulating bile flow—is considered the primary mechanism, improving fat digestion and reducing reflux-type symptoms.

Sodium bicarbonate is an FDA-recognized over-the-counter antacid that neutralizes excess gastric acid, providing rapid but short-lived relief from heartburn and acid indigestion. It raises intragastric pH by reacting with hydrochloric acid. It is indicated only for occasional, short-term use (up to two weeks) and is not appropriate for chronic GERD management. Several OTC and prescription formulations (e.g., omeprazole/sodium bicarbonate) incorporate it as an active ingredient.

Multiple Bifidobacterium species have GERD-specific clinical evidence: B. bifidum YIT 10347 adheres to gastric cells and promotes mucin production to improve the acid barrier. A 2024 double-blind RCT of B. animalis subsp. lactis MH-02 as adjunctive therapy in reflux esophagitis showed significant benefit on GERD symptoms. The 2020 systematic review (79% positive probiotic comparisons for GERD, n=951) includes Bifidobacterium-containing preparations.

Raw cabbage juice contains S-methylmethionine (historically called 'vitamin U'), which has demonstrated mucosal-protective and acid-neutralizing properties in early human trials. A 1940s–1950s Stanford clinical study showed that fresh cabbage juice accelerated peptic ulcer healing and helped normalize gastric function, which is closely related to the acid hypersecretion underlying heartburn. Animal studies confirm cabbage extract raises gastric pH. Modern human data remain limited.

Capsaicin's relationship with acid reflux is complex and bidirectional. Acute ingestion can transiently worsen heartburn, but repeated esophageal exposure to capsaicin appears to desensitize TRPV1-expressing nociceptive C-fibers, reducing heartburn intensity over time. Clinical evidence exists for both provocation and, paradoxically, longer-term symptom attenuation in GERD patients.

Fenugreek's soluble fiber fraction (galactomannan) forms a viscous raft in the stomach that acts as a physical barrier against acid reflux. A small placebo-controlled randomized trial found a fenugreek fiber product was as effective as ranitidine 75 mg twice daily in reducing heartburn severity over two weeks. Traditional use in Ayurveda and Mediterranean medicine for gastric complaints is also documented.

A randomized, double-blind, placebo-controlled trial (PMC6129344) tested a food-grade asafoetida formulation (Asafin) in 43 adults with non-ulcer functional dyspepsia. At 500 mg/day for 30 days, 81% of the treatment group showed significant improvement in overall symptom scores including heartburn and bloating, versus less than 10% in the placebo group. The smooth-muscle relaxant and carminative mechanisms of asafoetida are thought to reduce acid-related upper GI discomfort.

Ginger acts as a prokinetic agent, accelerating gastric emptying and reducing intragastric pressure, indirectly alleviating acid reflux. A 2011 double-blind study found 1.2 g ginger significantly accelerated gastric emptying in functional dyspepsia patients (half-emptying time reduced from 16.1 to 12.3 min). Its phenolic compounds reduce gastric contractions and esophageal inflammation. Traditional use in Ayurvedic and Chinese medicine for heartburn and dyspepsia spans millennia.

Indian gooseberry (amla) is one of the most clinically documented uses supported by WebMD/NLM monograph data, specifically for persistent heartburn (dyspepsia). Its gastroprotective and antacid properties have been noted in clinical contexts. WebMD lists it as a primary evidence-based use alongside dyslipidemia.

A 2024 randomized double-blind placebo-controlled trial found a supplement containing L. acidophilus LA14 produced statistically significant, progressive reductions in heartburn frequency and severity over 28 days in mild-to-moderate GERD patients. The 2020 systematic review (13 studies, 951 adults, PMC7019778) found 79% of probiotic comparisons reported positive GERD benefits, with L. acidophilus consistently present in effective formulations. Mechanisms include gastric emptying acceleration and mucosal immune modulation.

Lactobacillus gasseri LG21 is specifically identified in the 2020 systematic review (PMC7019778) as a standout probiotic strain for GERD, shown to increase pepsinogen I and shorten gastric residence time, reducing acid available for reflux. Of 14 probiotic comparisons reviewed, 79% showed positive GERD benefits, with L. gasseri LG21 prominently featured. It has demonstrated gastric mucosal protective effects in human studies.

A 2024 RCT of L. plantarum-fermented soybean supplementation in GERD patients significantly reduced heartburn, regurgitation, and pro-inflammatory cytokines IL-4, IL-6, IL-8 (p<0.05) with improved quality-of-life scores. L. plantarum appears in multi-strain probiotic formulations that showed positive GERD benefits in the 2020 systematic review (79% positive comparisons). It improves gut barrier integrity and reduces GI mucosal inflammation.

Lactobacillus rhamnosus is included in multi-strain probiotic formulations demonstrating GERD benefit in the 2020 systematic review (13 studies, 79% positive GERD comparisons, n=951). It improves gut barrier integrity via tight junction upregulation, reduces pro-inflammatory cytokines, and may reduce gastric dysbiosis linked to GERD. Most evidence derives from multi-strain probiotic studies rather than standalone L. rhamnosus RCTs.

Deglycyrrhizinated licorice (DGL) from Glycyrrhiza glabra has been tested in randomized trials for GERD. A placebo-controlled RCT of GutGard (75 mg standardized Glycyrrhiza extract, BID, 30 days) showed significant reduction in heartburn and regurgitation. A 2025 RCT of a standardized DGL extract demonstrated clinically meaningful heartburn reduction from week 2. DGL stimulates esophageal and gastric mucus secretion. Traditional use in botanical and Ayurvedic medicine for gastric inflammation spans over 4,000 years.

D-limonene has been evaluated in two small clinical trials for GERD and heartburn relief. In a pilot study of 19 patients dosing 1,000 mg daily or every other day, 89% reported complete remission by day 14. A follow-up placebo-controlled trial in 13 participants showed 86% of treated subjects achieved full symptom relief by day 14 versus 29% on placebo. The proposed mechanism involves gastric acid neutralization and support of normal esophageal peristalsis.

Mastic gum (Pistacia lentiscus resin), used in Mediterranean traditional medicine since antiquity, was tested in a randomized double-blind placebo-controlled trial (n=148, J Ethnopharmacol 2010): 350 mg TID for 3 weeks significantly improved functional dyspepsia symptoms including heartburn vs. placebo (77% vs. 40% improvement, p<0.02). A multicenter double-blind RCT also found mastic gum (1000 mg TID) comparable to omeprazole for GERD symptom reduction. Mechanism involves gastric mucosal anti-inflammation, mucus stimulation, and H. pylori inhibition.

Melatonin has been studied in multiple RCTs for GERD. A published PMC RCT (n=60) concluded oral melatonin is a promising therapeutic agent for GERD, significantly relieving heartburn and epigastric pain. A registered double-blind trial (NCT00564590, n=150) compared melatonin to PPIs with 24-hour esophageal pH monitoring. Melatonin reduces nitric oxide synthesis (reducing LES relaxation) and exerts antioxidant/anti-inflammatory effects on the esophageal mucosa.

Menthol has a complex, dual relationship with acid reflux. In GERD patients, esophageal exposure to menthol has been shown to provoke heartburn symptoms, while preclinical evidence suggests menthol may dampen esophageal inflammation via TRPV1 modulation. The relationship is clinically nuanced and not straightforwardly therapeutic.

Peppermint can worsen acid reflux and heartburn by relaxing the lower esophageal sphincter (LES), allowing gastric acid to reflux. Clinical evidence shows peppermint oil reduces LES pressure. This is an established contraindication for PO in GERD patients rather than a therapeutic application.

Salivary and esophageal mucins form a mucus-bicarbonate barrier that retards hydrogen ion diffusion and protects the esophageal mucosa from acid damage. Clinical research has shown that patients with reflux esophagitis have impaired esophageal mucin secretion compared to healthy controls. Stimulating mucin production is recognized as a therapeutic target in GERD management.

A double-blind, placebo-controlled clinical study (Muss et al., 2013; PMID 23524622) of 139 volunteers with chronic gastrointestinal dysfunction found the papaya preparation Caricol® improved constipation and bloating significantly; the heartburn endpoint did not reach significance due to a small subgroup (n=13, p=0.114). GoodRx notes some studies suggest papain can help with reflux and heartburn symptoms, but effect sizes are modest. Evidence is real but limited to preparation-level trials rather than isolated papain.

A double-blind, placebo-controlled clinical trial (Caricol®, 20 mL/day for 40 days) found improvement in heartburn among participants with chronic gastrointestinal dysfunction, though the heartburn subgroup was small and fell just short of statistical significance. Papain is thought to reduce gastric acidity and aid protein digestion, which may ease reflux symptoms. Traditional use of papaya for digestive discomfort is widespread across tropical regions.

Peppermint oil relaxes the lower esophageal sphincter (LES), which can worsen acid reflux and heartburn in GERD patients. Clinical evidence shows esophageal exposure to menthol prolongs LES relaxation significantly compared to normal swallowing. Enteric-coated formulations bypass the LES and are used for IBS without triggering reflux. Peppermint has strong evidence for functional dyspepsia (upper GI discomfort), a distinct condition from GERD.

Pepsin is now recognized as a primary pathogenic agent in gastroesophageal reflux disease (GERD) and laryngopharyngeal reflux (LPR), not merely a bystander. Refluxed pepsin damages esophageal and extraesophageal epithelium by degrading tight junction proteins and triggering reactive oxygen species, directly causing heartburn symptoms. Unlike acid, pepsin retains activity at pH levels up to 6.5 and is not fully denatured until above pH 8, meaning acid suppression with PPIs does not fully neutralize its damaging effects. Salivary pepsin concentration is a validated biomarker correlated with GERD symptom severity in clinical studies.

A 2023 three-arm randomized clinical trial (n=206) comparing curcumin from turmeric to omeprazole in functional dyspepsia found similar reductions in dyspepsia scores including heartburn at 28 and 56 days. Curcumin's anti-inflammatory and antioxidant properties may reduce esophageal and gastric mucosal inflammation. Traditional use in Ayurvedic and Chinese medicine for digestive disorders including heartburn spans 4,000 years. High-dose concentrated supplements may increase acid secretion in some individuals.

Ajwain has long been used in Ayurvedic and Unani medicine to relieve heartburn and acid-related stomach discomfort. Its carminative and antispasmodic properties are attributed to thymol and other volatile oils. Clinical evidence in humans is lacking; traditional texts cite it as a remedy for 'heartburn' (amlapitta). Individual responses vary and high doses may worsen reflux.

Anise has been traditionally used in Unani and Arabian medicine for dyspepsia and gastric discomfort, with documented gastric-protective activity in preclinical models. No clinical RCT has specifically evaluated anise for acid reflux or GERD. Its antispasmodic and mucosal-protective properties provide a plausible traditional rationale.

Annatto leaf and bark infusions are documented in traditional Central and South American medicine as remedies for heartburn, stomach upset, and gastrointestinal inflammation. The seeds are described as mildly astringent digestive aids. No human clinical trials have evaluated these claims.

ACV is a popular folk remedy for acid reflux based on the hypothesis that low gastric acid — not excess — causes reflux in some individuals, and ACV may correct this. Harvard Health and GoodRx note there is no published research confirming ACV's efficacy for GERD. Traditional use is well-documented; clinical evidence is absent.

Ashitaba has been used in Japanese traditional medicine for centuries to treat persistent heartburn. Preclinical in vitro research identified that its chalcones xanthoangelol and 4-hydroxyderricin inhibit gastric H+/K+-ATPase, the proton pump responsible for acid secretion. No controlled human trials have confirmed efficacy for GERD.

Bladderwrack contains alginic acid (alginate), the same compound used in the pharmaceutical product Gaviscon to form a protective raft over stomach acid. Traditionally it has been used internally for heartburn and GERD. No clinical trials have tested bladderwrack directly for this indication.

Caraway has traditional use as a carminative to reduce gas buildup that can exacerbate reflux symptoms. However, formal clinical evidence for caraway specifically in acid reflux or GERD is lacking, and one monograph explicitly notes caraway should not be used in gastroesophageal reflux disease. Its carminative and antispasmodic properties underlie its traditional role in upper digestive discomfort.

Cardamom has documented traditional use across Ayurvedic, Unani, and South Asian folk medicine for acid reflux, heartburn, and acid indigestion. Traditional use proposes that cardamom modulates gastric secretions and soothes irritated mucosal tissues. High-quality human clinical evidence for this specific indication is currently insufficient; evidence is mainly traditional with limited animal model support.

Chamomile (Matricaria chamomilla) is approved by the German Commission E for GI spasms and inflammatory conditions, and is used traditionally for dyspepsia including heartburn. It is a component of Iberogast, which has demonstrated superiority over placebo for functional dyspepsia in RCTs. University of Wisconsin-Madison Integrative Medicine GERD protocol specifically recommends chamomile tea for esophageal anti-inflammation. Standalone GERD clinical trials are absent.

Devil's Claw is listed in traditional and folk medicine references for heartburn and has been historically noted among its uses for digestive complaints. However, its bitter mechanism increases gastric acid production, which is pharmacologically opposed to acid reflux relief. Regulatory bodies and clinical pharmacology sources caution against use in peptic ulcer disease.

Fennel (Foeniculum vulgare) is approved by the German Commission E for dyspeptic complaints and has been used for over 2,000 years in European, Mediterranean, and Ayurvedic medicine as a carminative for bloating, gas, and acid-related discomfort. It is a component of Iberogast, studied in functional dyspepsia RCTs. Integrative medicine GERD protocols note it shares prokinetic properties with ginger. No standalone clinical RCTs for GERD or heartburn exist.

Several Gentiana species have been used by Siberian nomadic peoples as bitter teas to treat heartburn and dyspepsia. However, gentian is contraindicated in GERD and hyperacidity because its acid-stimulating properties could worsen reflux. Traditional use is documented; there are no clinical trials supporting use in acid reflux, and modern herbalists advise against it in this context.

Haliotis shell (Shi Jue Ming) is composed predominantly of calcium carbonate, a compound with well-established antacid activity. In TCM, shell-based herbs including abalone shell are traditionally used to treat stomach hyperacidity and heartburn. No clinical trials specific to haliotis shell for GERD have been conducted.

Marshmallow root (Althaea officinalis) contains mucilaginous polysaccharides that form a gel coating the esophageal and gastric mucosa, used in European and naturopathic medicine for acid-related GI irritation. The European Medicines Agency recognizes its traditional use for minor GI mucosal inflammation. It appears in university-based integrative medicine GERD protocols as a demulcent herb. No standalone RCTs for GERD exist.

Queen of the meadow (Filipendula ulmaria) has a long-documented traditional use for gastrointestinal hyperacidity, including heartburn and acid dyspepsia, noted by herbalists since the 17th century. The ESCOP monograph and German Commission E reference its use as a stomachic and antacid. No human clinical trials have confirmed antacid activity; all supporting evidence remains pre-clinical or traditional.

Slippery elm bark (Ulmus fulva) contains mucilage producing a protective gel that coats the esophageal and gastric mucosa. It is included in integrative medicine GERD protocols at academic medical centers. A mixture containing slippery elm bark improved GI symptoms in a published study. Medical sources confirm that rigorous standalone clinical evidence for GERD is absent, classifying it as traditional use with mechanistic plausibility.

Slippery elm has a long traditional history of use for heartburn and indigestion, supported by its mucilage mechanism: when mixed with water the gel coats the esophageal and gastric mucosa. A multi-ingredient Australian clinical study including slippery elm reported reductions in heartburn and reflux symptoms, but slippery elm was not isolated as the active agent. Formal review of available research has found little standalone clinical evidence that it helps GERD.

Triphala has a documented traditional role in Ayurveda for reducing gastric hyperacidity. It is described in classical texts as having 'deepana' (digestive-stimulating) properties. Modern reviews acknowledge hyperacidity reduction as one of its traditional applications, though controlled human trials specifically on acid reflux or GERD are lacking.

Wood betony has a long history in European folk medicine as a stomachic remedy for heartburn and acidity. Its bitter and carminative properties were considered useful for easing digestive discomfort including acid symptoms. No clinical trials exist to confirm this use.