Gastro-oesophageal reflux disease (GERD) — commonly called acid reflux — is one of the most prevalent gastrointestinal conditions in the developed world, affecting an estimated 20% of adults in Western Europe at least weekly. It occurs when the lower oesophageal sphincter (LOS), the muscular valve separating the stomach from the oesophagus, fails to close properly, allowing stomach acid and digestive contents to flow back into the oesophagus. The result is the characteristic burning discomfort that most people recognise as heartburn — along with a range of other symptoms that are less immediately obvious. Managing reflux effectively requires understanding both what drives it and what strategies reliably reduce it.
[warning:This article is for educational purposes only. Persistent or severe reflux symptoms — including chest pain, difficulty swallowing, unexplained weight loss, blood in stools or vomit, or symptoms that do not respond to dietary measures — require prompt medical evaluation. Do not attempt to manage these symptoms with supplements alone. GERD can have serious complications including oesophagitis, Barrett's oesophagus, and in rare cases oesophageal cancer if left untreated.]Understanding the Types and Symptoms
Acid reflux exists on a spectrum. Occasional, mild reflux after a heavy meal is a near-universal experience. Clinical GERD is defined as reflux that causes troublesome symptoms or complications at a frequency that impairs quality of life — typically twice a week or more.
The primary presenting symptom is heartburn — a burning sensation that rises from the upper abdomen toward the breastbone and throat, typically occurring after meals, when lying down, or when bending forward. Other common symptoms include:
- Regurgitation — the sensation of acid or food rising into the throat or mouth
- Chronic cough — particularly at night or after meals, caused by acid irritating the airway
- Hoarseness or voice changes — acid reaching the vocal cords causes inflammation and dysphonia
- The sensation of a lump in the throat (globus sensation)
- Difficulty swallowing (dysphagia) in more established disease
- Dental erosion from repeated acid exposure to tooth enamel
- Worsened asthma symptoms — GERD is a recognised trigger for bronchospasm
Laryngopharyngeal reflux (LPR), sometimes called "silent reflux," is a variant in which acid reaches the throat and larynx without producing significant heartburn. It is characterised primarily by chronic throat clearing, hoarseness, thick mucus, and post-nasal drip, and is frequently misdiagnosed as chronic sinusitis or allergies. LPR requires particular attention because it often goes untreated and the ongoing acid exposure increases the risk of laryngeal damage.
Infant reflux is common — affecting over one third of babies — and in most cases resolves without intervention by the end of the first year, coinciding with the development of more upright posture and solid food introduction.
What Drives Reflux: Key Contributing Factors
Lower oesophageal sphincter dysfunction is the central mechanism, but several factors determine why it occurs in specific individuals:
- Hiatal hernia — part of the stomach protrudes through the diaphragm, impairing LOS function; present in many chronic GERD patients
- Obesity and excess abdominal pressure — increased intra-abdominal pressure mechanically overcomes LOS resistance
- Certain foods and drinks — alcohol, coffee, chocolate, peppermint, fatty foods, citrus, and carbonated beverages all relax the LOS or increase acid production
- Smoking — reduces LOS pressure and impairs oesophageal clearance
- Medications — including calcium channel blockers, benzodiazepines, anticholinergics, and NSAIDs
- Delayed gastric emptying — the longer food stays in the stomach, the more pressure builds
- Stress — increases acid secretion and heightens oesophageal sensitivity to normal acid exposure
- Eating habits — large meals, eating quickly, eating late in the evening, and lying down shortly after eating
Dietary Approach to Reflux Management
Diet modification is the first-line non-pharmaceutical intervention for GERD, and for mild-to-moderate symptoms it can be highly effective. The goal is to reduce the frequency and volume of acid reflux episodes and to minimise irritation to the already inflamed oesophageal mucosa.
Foods to reduce or eliminate:
- Alcohol (relaxes LOS significantly)
- Coffee and strong tea (increases acid secretion)
- Chocolate (contains both methylxanthines and fat)
- Peppermint (relaxes LOS)
- Citrus fruits and tomatoes (directly irritate inflamed mucosa)
- High-fat meals (delay gastric emptying and relax LOS)
- Carbonated beverages (increase gastric pressure)
Foods generally well tolerated and potentially helpful:
- Oats and whole grains — high fibre content promotes gastric motility and is associated with lower GERD risk
- Non-citrus fruit — bananas, melons, apples, and pears; bananas in particular may help coat the oesophagus
- Lean protein — chicken, turkey, fish; low fat reduces gastric emptying delay
- Ginger — stimulates gastric motility and has anti-nausea properties
- Vegetables — especially non-acidic types; green beans, broccoli, cauliflower, leafy greens, cucumbers
- Healthy fats in moderation — avocado, olive oil, flaxseed — better than saturated or trans fats
Eating habits matter as much as food choices: eat smaller, more frequent meals rather than large ones; avoid eating within 3 hours of bedtime; eat slowly and chew thoroughly; and remain upright for at least 2 hours after meals. Elevating the head of the bed by 15–20 cm significantly reduces night-time reflux.
Natural and Supplementary Support for Reflux
DGL Liquorice — Mucosal Regeneration
Deglycyrrhizinated liquorice (DGL) is the most evidence-supported natural supplement for upper GI mucosal protection. It stimulates mucus secretion from the oesophagus and stomach lining, forming a protective layer that reduces acid irritation, and supports mucosal cell regeneration. DGL is taken in chewable tablet form, which ensures contact with the oesophageal mucosa — swallowing whole capsules reduces this effect. It is well tolerated, without the blood pressure-raising effect of non-DGL liquorice. Studies have found it comparable to antacids for symptom relief in peptic ulcer disease.
Mastic Gum — Gastric Mucosal Support
Mastic gum (resin from Pistacia lentiscus) has documented activity against Helicobacter pylori, the bacterium implicated in gastric and peptic ulcer disease and contributing to impaired mucosal integrity in many GERD patients. Independent of its H. pylori activity, mastic has anti-inflammatory effects on the gastric lining and may support healing of acid-damaged mucosa.
Slippery Elm and Marshmallow Root — Demulcents
Both slippery elm bark (Ulmus rubra) and marshmallow root (Althaea officinalis) are classified as demulcent herbs — they produce a mucilaginous coating on contact with mucous membranes, physically soothing and protecting irritated oesophageal tissue. They are among the oldest recorded herbal remedies for upper GI complaints and their mechanism — forming a physical protective layer — is as applicable today as it was historically.
Melatonin — An Underrecognised Role in GERD
Melatonin is not only a sleep hormone; it is also produced in the gastrointestinal tract at concentrations significantly higher than in the pineal gland. Research has found that melatonin strengthens the lower oesophageal sphincter and reduces oesophageal acid exposure. Several controlled clinical studies have compared melatonin (3–6 mg at bedtime) to proton pump inhibitors for symptom relief, with melatonin performing comparably or complementarily. Low melatonin levels are associated with higher rates of peptic ulcer disease and GERD. This makes melatonin a particularly logical supplement for people with reflux that peaks at night.
Zinc-L-Carnosine
Zinc-L-carnosine (ZnC, commercially known as PepZin GI) is a chelated compound of zinc and the dipeptide L-carnosine. It has exceptional mucosal protective and healing properties — clinically demonstrated in peptic ulcer disease — and acts by stabilising the gastric mucosa, inhibiting urease activity (an H. pylori enzyme), and stimulating mucosal repair. It is particularly relevant for people whose reflux is associated with gastric mucosal inflammation or NSAID use.
B Vitamins — Risk Reduction
Population-based studies have found that higher dietary intake of B vitamins — particularly folate (B9), riboflavin (B2), and B12 — is associated with lower risk of oesophageal reflux disease, Barrett's oesophagus, and oesophageal adenocarcinoma. The mechanism is likely related to cell methylation and DNA repair processes that influence mucosal integrity. While this is observational rather than interventional data, ensuring adequate B vitamin status is a reasonable complementary measure, particularly given that B vitamin deficiencies are common in people taking long-term proton pump inhibitors (PPIs, which impair B12 absorption).
[tip:People who have been taking proton pump inhibitors (PPIs) for more than 3–6 months should be aware that PPIs significantly reduce the absorption of magnesium, vitamin B12, vitamin C, calcium, and zinc. If you are a long-term PPI user, discussing micronutrient status with your doctor — and considering targeted supplementation — is important for maintaining nutritional adequacy.]Supplements for Reflux and Mucosal Support at Medpak
We carry the key evidence-supported supplements for GERD and upper GI mucosal support discussed in this article:
[products:swanson-dgl-liquorice-extract-90-capsules, natural-factors-dgl-deglycyrrhizinated-licorice-root-extract-90-chewable-tablets, jarrow-formulas-mactic-gum-1000-mg-60-capsules, now-foods-slippery-elm-400-mg-100-veg-capsules, natures-way-marshmallow-root-960-mg-100-veg-capsules, swanson-zinc-carnosine-featuring-pepzingi-60-capsules] [products:doctors-best-pepzin-gi-zinc-l-carnosine-complex-120-veg-capsules, now-foods-melatonin-3-mg-60-veg-capsules, life-extension-melatonin-3-mg-60-veg-capsules, aliness-vitamin-b-complex-b-50-methyl-plus-tmg-100-veg-capsules, bestlab-best-gastric-90-capsules]When to See a Doctor
Lifestyle and dietary modification, combined with targeted supplementation, can significantly reduce symptoms in mild-to-moderate GERD. Medical treatment — including antacids, H2 blockers, proton pump inhibitors, and in some cases surgical intervention — is appropriate when symptoms are severe, persistent, or complicated. You should seek medical evaluation if symptoms occur more than twice a week consistently, if you are taking over-the-counter antacids more than 2–3 times per week, if symptoms persist despite dietary measures, or if any of the alarm symptoms listed in the warning above are present. For broader digestive health support, our digestive system collection includes a wide range of complementary options.
[note:All products at Medpak are shipped from within the EU, ensuring fast delivery and no customs complications for customers across Europe. Supplements mentioned in this article support digestive comfort and mucosal health; they are not a substitute for medical treatment of GERD or related conditions.]
