Stomach acidity: why protein “sits” there and what to do about it
A piece of meat sits in the stomach for two hours, with belching, heaviness, and bloating an hour after eating — and the thought “protein doesn’t suit me.” It does. There is not enough acid to digest it, and after 45 this is almost normal: acid production declines with age, while omeprazole and stress finish off the rest. Section — heartburn, gallbladder, sensitive bowel.
Why acid is needed
It unfolds protein so enzymes can break it down, kills bacteria from food, separates B12 from protein, and releases iron, zinc, and calcium for absorption. Too little acid — protein ferments, bacteria get through, and B12 and iron are not absorbed. The method with its 100-130 g of protein per day does not work properly without acid: heaviness instead of satiety.
Signs of low acidity
- Heaviness and belching 30-60 minutes after meat
- Bloating after protein-rich food, but not after vegetables
- Undigested food in the stool
- Low ferritin and B12 despite a good diet
- Brittle nails, hair loss
- Heartburn that improves with omeprazole for a while and then gets worse
What helps
| Tool | How | Why |
|---|---|---|
| Chew | 20-30 times per bite | mechanical digestion and a signal to the stomach |
| Lemon or apple cider vinegar | a teaspoon in 100 mL of water 10 minutes before eating | acid from outside; if it burns — it is not for you |
| Bitters | arugula, chicory, endive before eating | stimulate acid and bile production |
| Portions | smaller, 100-130 g of protein per meal, not 250 | easier on the stomach |
| No water during meals | a glass 20 minutes before, not a liter with the meal | do not dilute the acid |
| Betaine HCl | as prescribed, with confirmed low acidity | replacement; not with gastritis with erosions |
Omeprazole: do not stop on your own, but discuss it
Acid blockers are among the most frequently prescribed medications in the world, often for life, although they are intended for 4-8 weeks. Long-term use means a deficiency of B12, magnesium, and iron, a risk of fractures, and intestinal infections. On a low-carbohydrate diet, the cause of heartburn — fermentation of sugar and flour — disappears, and the need for omeprazole often goes away. But abrupt discontinuation causes acid rebound and a flare-up of heartburn. The plan should be made only with a doctor: reduce the dose over the course of a month following the protocol from the article heartburn and reflux. About B12, which is blocked by omeprazole — B vitamins and B12.
Frequently asked questions
How can acidity be checked?
Precisely — pH monitoring, which is rarely available. Indirectly — blood gastrin, symptoms after protein, ferritin, and B12. Practically — the lemon test: if you feel better after a teaspoon in water before a meal, there was not enough acid.
Gastritis and acid — isn’t that a contradiction?
Gastritis can occur with both high and low acidity; atrophic gastritis after 45 is almost always associated with low acidity. Vinegar is not allowed with erosions; bitters and chewing are suitable for everyone.
Will enzymes help?
Pancreatic enzymes work in the intestine, not in the stomach. With low acidity, they help partially, but do not eliminate the cause.
- Digestion When You Change Your Diet
- Heartburn, Gallbladder, Sensitive Gut
- Microbiome and Intolerances
Reviewed by Anastasia Zhukova, Fitness Trainer • Author of a Nutrition and Training System • Creator of an AI Personal Support Platform
A human has reviewed this material against the method and real client practice.