Is Potato Soup Acidic or Alkaline?
Potato soup (prepared) is alkaline: Negative PRAL: alkalizing after digestion.
Classification
Potato soup is alkaline at −3.2 per 100 ml. The potassium from potatoes, leeks and carrots passes into the cooking liquid, which you eat, and protein hardly plays a role. A 300 ml bowl adds about −10. Adding sausage to the soup shrinks this advantage considerably. Marjoram and parsley on top do not.
In the Meals & Fast Food category, potato soup (prepared) ranks #14 of 118, sorted from alkaline to acid-forming. More alkaline options include Tomato soup (−3.2), Fruit salad (−3.3), Frozen potato rösti (−3.4). More acid-forming are Frozen potato pancakes (−2.8), Chili sin carne (−2.8), Potato dumplings (half and half) (−2.6).
Acidic or alkaline: PRAL, not pH
On this site, acidic and alkaline refer to the PRAL (potential renal acid load). It estimates what a food leaves behind once it has been digested: a positive value is acid-forming, a negative value is alkalizing. That is different from the pH of the food itself: a lemon tastes sour, yet its PRAL is −4.0, so it is alkalizing. Your diet does not change your blood pH. It does change how much acid your kidneys have to deal with.
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Frequently Asked Questions
Is potato soup acidic?
It depends on what you mean by acidic. The pH describes the food itself, for example how sour it tastes. The PRAL describes what it leaves behind after digestion: Potato soup (prepared) has a PRAL of −3.2 per 100 ml, so it counts as alkaline in your daily acid-base balance.
How much potato soup do I need for a noticeable effect?
A meal (300 g) of potato soup adds −9.6 to your daily balance. For comparison: an egg is around +5.4, a slice of cheese around +6. So one serving of potato soup roughly offsets one of them.
Why is potato soup alkaline even though it is not a typical alkaline food?
The PRAL depends on the minerals left over after digestion, not on taste or pH. Potato soup provides more potassium, magnesium and calcium than phosphorus and protein, so the balance is negative (−3.2).
Potato Soup logged, balance checked.
Basentracker adds up every meal automatically and shows whether your day is in the alkaline range. The same values as on this page, all 977 foods, photo scan, recipes.
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Compare all Meals & Fast Food: Meals & Fast Food table. Common questions are answered in Acidic or Alkaline?, and the PRAL calculator adds up a whole meal.
Source: Basentracker food database (PRAL according to Remer & Manz, calculated from protein, phosphorus, potassium, magnesium and calcium per 100 g). This information does not replace medical advice.