Food Acidity ranges

AcidityDescription
0 to 3.6Very acid - very bad for heartburn
3.6 to 4.5Mildly acid - may or may not cause heartburn
4.5 or higherNot acid - most probably won't cause heartburn

For more details search on food acidity and alkalinity look at the list below. Items with higher values are the safest for your stomach. For more details on specific food items and whether they cause heartburn or not take a look at Food Database

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Item Approximate pH
Salmon, fresh, boiled5.85 - 6.50
Salmon, fresh, broiled5.36 - 6.40
Salmon, Red Alaska, canned6.07 - 6.16
Sardines5.70 - 6.60
Sardine, Portuguese, in olive oil5.42 - 5.93
Satay sauce5
Sauce, Enchilada5.50
Sauce, Fish4.93 - 5.02
Sauce, Shrimp7.01 - 7.27
Sauerkraut3.30 - 3.60
Scallion6.20
Scallop6
Scotch Broth.5.92
Sea Snail (Top shell)6
Shad Roe, sauted5.70 - 5.90
Shallots, cooked5.30 - 5.70
Sherbet, raspberry3.69
Sherry-wine3.37
Shredded Ralston5.32 - 5.60
Shredded Wheat6.05 - 6.49
Shrimp6.50 - 7.00
Shrimp Paste5.00 - 6.77
Smelts, Sauted6.67 - 6.90
Soda Crackers5.65 - 7.32
Soup, Broccoli Cheese Suop, condensed5.60
Soup, Chicken Broth, rts.5.8
Soup, Corn Soup, condensed6.8
Soup, Cream of celery Saoup, condensed6.20
Soup, Cream of Mushroom, condensed6.00 - 6.20
Soup, Cream style corn, condensed5.70 - 5.80
Soup, Cream of Potato soup, condensed5.80
Soup, Cream of shrimp soup, condensed5.8
Soup, Minestronen condensed5.4
Soup, New England Clam Chowder,condensed6.00
Soup, Oyster Stew, condensed6.30
Soup, Tomato Rice Soup, condensed5.50
Soup, Soy infant formula6.60 - 7.00
Soy Sauce4.40 - 5.40
Soy bean curd (tofu)7.2
Soybean milk7
Spaghetti, cooked5.97 - 6.40
Spinach5.50 - 6.80
Spinach, chopped5.38 - 5.52
Spinach, cooked6.60 - 7.18
Spinach, frozen, cooked6.30 - 6.52
Spinach, pureed5.50 - 6.22
Spinach, strained5.63 - 5.79
Squash, acorn, cooked5.18 - 6.49
Squash, Kubbard, cooked6.00 - 6.20
Squash, white, cooked5.52 - 5.80
Squash, yellow, cooked5.79 - 6.00
Squid6.00 - 6.50
Sturgeon6.2
Strawberries3.00 - 3.90
Strawberries, California3.32 - 3.50
Strawberries, frozen3.21 - 3.32
Strawberry Jam3.00 - 3.40
Straw mushroom4.9
Sweet Potatoes5.30 - 5.60
Swiss Chard, cooked6.17 - 6.78

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