Peptic Ulcer Diet - Acidity Ratings of Foods

Search entire U.S. food database:

  Enter any parts of food name then hit Return to search.

     Green: alkaline or low-acid food;  Red: acidic food.


Food NamePro.Pho.Pot.Mag.Cal.PRAL 
Milk, human1.031451332-0.5
Milk3.2994148111170.2
Milk, cow's, fluid, whole3.2291143101130.2
Milk, cow's, fluid, whole, low-sodium3.10862535101-2.1
Milk, calcium fortified, cow's, fluid, whole3.219114310412-3.7
Milk, calcium fortified, cow's, fluid, 1% fat3.379515011219-1.1
Milk, calcium fortified, cow's, fluid, skim or nonfat3.4010116611204-1.0
Milk, cow's, fluid, other than whole ("lowfat")3.3396152111190.2
Milk, cow's, fluid, 2% fat3.3094150111170.1
Milk, cow's, fluid, acidophilus, 1% fat3.3795150111190.2
Milk, cow's, fluid, acidophilus, 2% fat3.3094150111170.1
Milk, cow's, fluid, 1% fat3.3795150111190.2
Milk, cow's, fluid, skim or nonfat, 0.5% or less butterfat3.37101156111250.2
Milk, cow's, fluid, filled with vegetable oil3.3397139131280.3
1234567891011121314151617181920...Last

Usage Note

  • Foods are color coded: Green for alkaline or low-acid foods and Red for acidic foods.
  • The larger the PRAL magnitude, the more alkaline or acidic the food is.
  • This database contains the PRAL values and acidity ratings for 6,941 foods.
  • Abbreviations: Pro = Protein, Pho = Phosphorus, Pot = Potassium, Mag = Magnesium, Cal = Calcium.
  • Phosphorus, potassium, magnesium and calcium values are in mg and calculated per 100g of food weight.
  • Protein value is in grams and calculated per 100g of food weight.
  • Pie chart shows relative contributions to total calories from carbohydrate, protein and fat (and alcohol, if exists).
  • The mineral and vitamin charts show the relative contents of minerals and vitamins of each food. The higher the bubble, the higher mineral or vitamin content a food has relative to other foods. The larger the bubble, the greater the mineral or vitamin content relative to the Recommended Daily Allowances.

National Institutes of Health: Spicy and acidic foods do not cause peptic ulcer. But they can worsen the symptoms and slow the healing.
This food database has alkaline and acid ratings of nearly 7,000 foods to help you choose foods for a peptic ulcer diet. The PRAL rating (described at bottom of webpage) is color-coded with RED to indicate acidic foods. The higher the value of the rating, the higher the acidity.

What is a peptic ulcer?

information from the National Institutes of Health

A peptic ulcer is a sore on the lining of the stomach or duodenum, the beginning of the small intestine. Less commonly, a peptic ulcer may develop just above the stomach in the esophagus, the tube that connects the mouth to the stomach.

A peptic ulcer in the stomach is called a gastric ulcer. One that occurs in the duodenum is called a duodenal ulcer. People can have both gastric and duodenal ulcers at the same time. They also can develop peptic ulcers more than once in their lifetime.

Peptic ulcers are common. Each year in the United States, about half a million people develop a peptic ulcer.

What causes peptic ulcers?

A bacterium called Helicobacter pylori (H. pylori) is a major cause of peptic ulcers. Nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin and ibuprofen, are another common cause. Rarely, cancerous or noncancerous tumors in the stomach, duodenum, or pancreas cause ulcers.

Peptic ulcers are not caused by stress or eating spicy food, but both can make ulcer symptoms worse. Smoking and drinking alcohol also can worsen ulcers and prevent healing.

What are the symptoms of a peptic ulcer?

Abdominal discomfort is the most common symptom of both duodenal and gastric ulcers. Felt anywhere between the navel and the breastbone, this discomfort usually

  • is a dull or burning pain
  • occurs when the stomach is empty—between meals or during the night
  • may be briefly relieved by eating food, in the case of duodenal ulcers, or by taking antacids, in both types of peptic ulcers
  • lasts for minutes to hours
  • comes and goes for several days or weeks
Other symptoms include
  • weight loss
  • poor appetite
  • bloating
  • burping
  • nausea
  • vomiting

Diet and nutrition in peptic ulcer disease

Peptic ulcer patients should avoid any spice that causes discomfort, especially during exacerbation of peptic disease. Currently, studies indicate that it is prudent to avoid alcohol. This is especially true for the concentrated forms, such as 40% (80 proof) alcohol. Coffee should be avoided on the basis of its strong acid secretagogue property. Coffee can induce dyspepsia. Whether noncoffee caffeine-containing beverages (tea, soft drinks) induce peptic ulcer is unknown, but they are acid secretion stimulators. Decaffeinated coffee has an acid stimulating effect as well. It is reasonable to have peptic ulcer patients restrict decaffeinated coffee and all caffeine-containing beverages. There appears to be no evidence to restrict dietary fiber. Some fiber-containing foods may possess factors that are protective against ulcer disease. Citric acid juices may induce reflux and cause discomfort in selective patients.
NIH Research on Diet & Nutrition in Ulcer Disease

What is PRAL: Potential Renal Acid Load?

PRAL value is calculated from a formula developed by Thomas Remer and other researchers at the Department of Nutrition and Health, the Research Institute of Child Nutrition, Dortmund, Germany, to assess the acidity of foods and diets.

PRAL formula:

PRAL = 0.49 x protein + 0.037 x phosphorus - 0.021 x potassium - 0.026 x magnesium - 0.013 x calcium

Detailed information about PRAL at The American Journal of Clinical Nutrition: PRAL Research

Today, there is a general consensus that diet can markedly affect acid-base status and that a person’s acid load can be specifically manipulated by dietary means. An established method of estimating acid loads of foods or diets is by calculating the potential renal acid load (PRAL). PRAL provides an estimate of the production of endogenous acid that exceeds the level of alkali produced for given amounts of foods ingested daily. The concept of PRAL calculation is physiologically based and takes into account different intestinal absorption rates of individual minerals and of sulfurcontaining protein, as well as the amount of sulfate produced from metabolized proteins. This method of calculation was experimentally validated in healthy adults, and it showed that, under controlled conditions, acid loads and renal net acid excretion (NAE) can be reliably estimated from diet composition.


List of the Most Acidic Foods

This acidity ranking on this list is based on the PRAL formula described above: the higher the PRAL value, the more acidic the food.



The Most Acidic Foods based on PRAL formula PRAL value

Leavening agents, baking powder, double-acting, straight phosphate 270

Puddings, all flavors except chocolate, low calorie, instant, dry mix 85

Gelatin desserts, dry mix, reduced calorie, with aspartame, no added sodium 75

Soy protein isolate, PROTEIN TECHNOLOGIES INTERNATIONAL, SUPRO 69

Soy protein isolate 63

Gelatin desserts, dry mix, reduced calorie, with aspartame 55

Soy protein concentrate, crude protein basis (N x 6.25), produced by acid wash 44

Gelatins, dry powder, unsweetened 42

Soy protein concentrate, produced by acid wash 42

Egg, yolk, dried 42

Vital wheat gluten 42

Egg, whole, dried 40

Seeds, sunflower seed kernels, oil roasted, without salt 37

Seeds, sunflower seed kernels, toasted, with salt added 37

Seeds, sunflower seed kernels, oil roasted, with salt added 37

Seeds, sunflower seed kernels, toasted, without salt 37

Seeds, sunflower seed flour, partially defatted 37

Whale, beluga, meat, dried (Alaska Native) 36

Milk, dry, nonfat, calcium reduced 35

Egg, whole, dried, stabilized, glucose reduced 35

Soy protein isolate, potassium type, crude protein basis 35

Tofu, dried-frozen (koyadofu) 35

Smelt, dried (Alaska Native) 35

Steelhead trout, dried, flesh (Shoshone Bannock) 35

Seeds, sesame flour, low-fat 34

Fish, whitefish, dried (Alaska Native) 34

Puddings, chocolate flavor, low calorie, instant, dry mix 33

Soy protein isolate, potassium type 32

Fish, salmon, chum, dried (Alaska Native) 32


The Most Acidic Foods based on PRAL formula PRAL value

Snacks, pork skins, barbecue-flavor 32

Salmon, red (sockeye), filets with skin, smoked (Alaska Native) 31

Caribou, shoulder meat, dried (Alaska Native) 31

Fish, cod, Atlantic, dried and salted 30

Seeds, sunflower seed kernels, dry roasted, with salt added 30

Snacks, pork skins, plain 30

Cereals ready-to-eat, WAFFELOS 30

Seeds, sunflower seed kernels, dry roasted, without salt 30

Seeds, safflower seed meal, partially defatted 30

Cheese, pasteurized process, swiss, low fat 30

Cheese, pasteurized process, cheddar or American, fat-free 30

Puddings, banana, dry mix, instant 29

Seeds, sesame flour, partially defatted 29

Puddings, banana, dry mix, instant, with added oil 29

Cheese, pasteurized process, American, low fat 29

Cheese, parmesan, low sodium 29

Puddings, lemon, dry mix, instant 28

Cereals ready-to-eat, wheat germ, toasted, plain 28

Cheese, parmesan, grated 28

Cheese, goat, hard type 28

Seal, bearded (Oogruk), meat, partially dried (Alaska Native) 28

Seeds, pumpkin and squash seed kernels, roasted, without salt 27

Veal, variety meats and by-products, pancreas, cooked, braised 27

Cheese, romano 27

Seeds, pumpkin and squash seed kernels, roasted, with salt added 27

Seeds, pumpkin and squash seed kernels, dried 27

Cheese spread, pasteurized process, American 27

Caribou, rump meat, half dried (Alaska Native) 27

Cheese, pasteurized process, pimento 26

Cheese, parmesan, shredded 26

Fish, roe, mixed species, cooked, dry heat 26


The Most Acidic Foods based on PRAL formula PRAL value

Puddings, vanilla, dry mix, instant 26

Pork, cured, bacon, cooked, pan-fried 26

Cheese, pasteurized process, cheddar or American, low sodium 26

Pork, cured, bacon, cooked, microwaved 25

Cheese product, pasteurized process, American, reduced fat, fortified with vitamin D 25

Cheese, parmesan, hard 25

Cheese, pasteurized process, swiss 25

Pork, cured, bacon, cooked, broiled, pan-fried or roasted 25

Puddings, coconut cream, dry mix, instant 25

Cereals ready-to-eat, QUAKER, KRETSCHMER Wheat Germ, Regular 25

Beef, variety meats and by-products, liver, cooked, braised 25

Lamb, variety meats and by-products, liver, cooked, braised 25

Seeds, sesame flour, high-fat 25

Cheese product, pasteurized process, cheddar, reduced fat 25

Pork, cured, bacon, cooked, broiled, pan-fried or roasted, reduced sodium 25

Beef, variety meats and by-products, pancreas, cooked, braised 24

Seeds, sesame butter, tahini, type of kernels unspecified 24

Pork, cured, bacon, cooked, baked 24

Egg Mix, USDA Commodity 24

Veal, variety meats and by-products, thymus, cooked, braised 24

Cheese, mozzarella, nonfat 24

Veal, variety meats and by-products, liver, cooked, pan-fried 23

Beef, variety meats and by-products, liver, cooked, pan-fried 23

Egg substitute, powder 23

Cheese, low fat, cheddar or colby 23

Veal, variety meats and by-products, liver, cooked, braised 23

Cereals ready-to-eat, QUAKER, KRETSCHMER Honey Crunch Wheat Germ 22

USDA Commodity, Bakery, Flour Mix Low-fat 22

USDA Commodity, Bakery, Flour Mix 22

Chicken, liver, all classes, cooked, pan-fried 22

Veal, variety meats and by-products, kidneys, cooked, braised 22


The Most Acidic Foods based on PRAL formula PRAL value

Leavening agents, yeast, baker's, active dry 22

KENTUCKY FRIED CHICKEN, Biscuit, analyzed prior to January 2007 22

Cornmeal, self-rising, bolted, plain, enriched, white 22

Moose, liver, braised (Alaska Native) 22

Turkey bacon, cooked 22

Cornmeal, self-rising, bolted, plain, enriched, yellow 22

Chicken, meatless 22

Fruit-flavored drink, dry powdered mix, low calorie, with aspartame 22

Emu, full rump, cooked, broiled 21

Beef, variety meats and by-products, kidneys, cooked, simmered 21

Seeds, cottonseed flour, low fat (glandless) 21

Seeds, cottonseed meal, partially defatted (glandless) 21

Cheese, gruyere 21

Pancakes, buckwheat, dry mix, incomplete 21

Cheese, swiss 21

Parmesan cheese topping, fat free 21

Chicken, liver, all classes, cooked, simmered 21

Cheese, swiss, low sodium 21

Imitation cheese, american or cheddar, low cholesterol 21

Babyfood, baked product, finger snacks cereal 21

Cheese, american cheddar, imitation 21

Cheese, mozzarella, low sodium 21

Cheese, swiss, low fat 21

Go to Home Page