01 · The lining
What the gastric mucosa is and how it protects itself
The gastric mucosa is the inner lining of your stomach. It makes the acid and enzymes that start digestion, and it keeps both off the stomach wall.
The lining has three layers of its own:
- Surface epithelium. A single sheet of cells that faces the inside of the stomach and secretes mucus. Gastric glands open through it. Their parietal cells make acid, and their chief cells make pepsinogen, which acid turns into the digestive enzyme pepsin.
- Lamina propria. A thin layer of connective tissue. Its small blood vessels feed the surface cells.
- Muscularis mucosae. A fine band of smooth muscle that lets the lining fold and shift.
Five defenses keep acid on the right side of that lining:
- Mucus and bicarbonate. Surface cells release a gel of mucus and bicarbonate. Acid stays on the inside of the gel, while the side touching the cells stays close to neutral.
- Tight junctions. Proteins seal the gaps between neighboring cells, so acid cannot seep between them.
- Blood flow. A dense network of capillaries brings oxygen and bicarbonate to the surface and carries away acid that gets through.
- Prostaglandins. These local signaling molecules keep the mucus, the bicarbonate and the blood flow coming.
- Constant renewal. Your body replaces the surface cells every three to five days, so the barrier is rebuilt all the time.
The lining in numbers
- Surface cell renewal
- 3–5 days
- In the stomach wall
- 4 layers
- Typical stomach acid
- pH 1.5–3.5
02 · Everyday strain
Everyday things that strain the stomach lining
A healthy lining handles strong acid every day. Some common habits make that job harder. They weaken its defenses, irritate the surface directly, or both.
- Frequent NSAID use. Ibuprofen, naproxen and aspirin block the enzymes that make prostaglandins. With fewer prostaglandins, the lining makes less mucus and bicarbonate, and blood flow to the surface falls. If you take pain relievers often, talk to your doctor about it.
- Alcohol. Alcohol irritates the surface cells and can disrupt the mucus layer. The more you drink in one sitting, the stronger the effect.
- Smoking. Smoking reduces blood flow to the lining and lowers the bicarbonate and prostaglandins it makes.
- Stress. Nerves and hormones link your brain and your digestive tract. Stress can change how fast your stomach empties and make normal digestive sensations feel stronger.
03 · What you feel
What “digestive discomfort” covers
Digestive discomfort is a broad label, and doctors do not use it as a diagnosis. Most often it describes how your stomach feels during or after a meal:
- a full or heavy feeling that lasts long after you eat
- bloating, or a tight and stretched belly
- burping or gas
- an unsettled feeling in the upper stomach
The everyday causes are familiar. Large or fatty meals stay in the stomach longer. Eating fast makes you swallow more air, and fizzy drinks add gas of their own. Alcohol irritates the lining, and stress changes how your stomach moves and how much you notice it.
An upset stomach after a big meal now and then is common. If discomfort keeps coming back, gets worse or comes with any of the signs in the next section, see a doctor.
04 · Red flags
When to see a doctor about stomach pain
Some stomach symptoms need a doctor, and no supplement should delay that visit. Get medical advice promptly if you notice any of these:
- severe stomach pain, or pain that lasts or keeps coming back
- pain that wakes you at night
- vomiting, especially vomiting blood or material that looks like coffee grounds
- black, tarry or bloody stools
- weight loss you cannot explain
- trouble swallowing, or pain when you swallow
- feeling full after only a few bites, or a lasting loss of appetite
Call 911 or go to the nearest emergency room if the pain is sudden and severe, if you are vomiting blood, or if black stools come with dizziness or fainting.
Talk to your doctor before you start any supplement if you take prescription medication, take pain relievers often, are pregnant or nursing, or manage a medical condition.
05 · The formula
Inside STOMACH: four ingredients and the lining
STOMACH is a daily supplement for stomach lining support. It contains four ingredients, and the label names every one.
- Vitamin A, as beta-carotene (678 mcg, 38% DV). Vitamin A supports the maintenance of normal mucous membranes, including the lining of your stomach. Your body converts beta-carotene into vitamin A as it needs it.
- Vitamin C (90 mg, 100% DV). Your body needs vitamin C to form collagen, a structural protein in the stomach wall.
- Centella asiatica extract (gotu kola). A traditional botanical. In laboratory and animal research, compounds in Centella such as asiaticoside have been studied for their effects on gastric mucus and on collagen and fibronectin production. Human research on the stomach is limited, and we would rather say so than overstate it.
- CM chitosan. Chitosan comes from chitin, the material in shellfish shells. It forms thin protective films, which is why medical dressings use it. CM (carboxymethyl) chitosan is a water-soluble form.
Centella asiatica extract and CM chitosan share one 600 mg blend, so the label does not show how much of each it contains. You should know that before you buy.
Take one capsule twice a day, one in the morning and one in the evening, with a light snack. Each jar holds 60 capsules, a 30-day supply. Read the full Supplement Facts panel.
