Is Fish Soup Acidic or Alkaline?
Fish soup (prepared) is slightly acid-forming: Positive PRAL: acid-forming after digestion.
Classification
Fish soup comes in at +0.7 per 100 ml. That makes it just barely acid-forming and much milder than fish itself: plenty of broth dilutes the fish protein, and tomatoes and vegetables provide potassium, though not quite enough to balance it. The more vegetables and the fewer fish pieces in the pot, the closer it moves to alkaline. At 50 kcal per 100 ml, it stays light.
In the Meals & Fast Food category, fish soup (prepared) ranks #43 of 118, sorted from alkaline to acid-forming. More alkaline options include Semolina porridge (+0.6), Semolina pudding (+0.6), Bami Goreng (+0.6). More acid-forming are Onion rings (+0.7), Vegetarian lasagna (+0.8), Rice pudding (+1.2).
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.
What balances fish soup
A meal (300 g) of fish soup adds +2.1 to your daily balance. These three bring it back; the grams shown offset exactly this serving.
Frequently Asked Questions
Is fish 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: Fish soup (prepared) has a PRAL of +0.7 per 100 ml, so it counts as slightly acid-forming in your daily acid-base balance.
How much avocado offsets a meal (300 g) of fish soup?
A meal (300 g) of fish soup adds +2.1 to your daily balance. Avocado (ripe) has −9.9 per 100 g, so about 20 g of avocado offset this serving.
Do I have to avoid fish soup on an alkaline diet?
No. What counts is the balance of the whole day, not a single food. Fish soup is slightly acid-forming; with enough vegetables, potatoes and fruit on the same plate, the meal stays balanced.
Fish Soup logged, balance checked.
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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.