Is Croissant Acidic or Alkaline?
Croissant (baked) is slightly acid-forming: Positive PRAL: acid-forming after digestion.
Classification
A croissant is wheat dough folded with many layers of butter. The flour supplies protein and phosphorus, the butter almost nothing but fat, so it stays at +3.4. The high butter content actually dilutes the acid load per 100 g, but it drives the energy up to 426 kcal. With jam, it stays that way. A ham and cheese croissant is clearly more acid-forming.
In the Grains, Bread & Pasta category, croissant (baked) ranks #41 of 121, sorted from alkaline to acid-forming. More alkaline options include Granola (+3.4), Mixed roll (+3.3), Rye roll (+3.1). More acid-forming are Multigrain roll (+3.5), Sourdough (starter from rye flour) (+3.6), Corn grits (polenta) (+3.7).
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 croissant
Two slices (100 g) of croissant adds +3.4 to your daily balance. These three bring it back; the grams shown offset exactly this serving.
Frequently Asked Questions
Is croissant 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: Croissant (baked) has a PRAL of +3.4 per 100 g, so it counts as slightly acid-forming in your daily acid-base balance.
How much avocado offsets two slices (100 g) of croissant?
Two slices (100 g) of croissant adds +3.4 to your daily balance. Avocado (ripe) has −9.9 per 100 g, so about 30 g of avocado offset this serving.
Do I have to avoid croissant on an alkaline diet?
No. What counts is the balance of the whole day, not a single food. Croissant is slightly acid-forming; with enough vegetables, potatoes and fruit on the same plate, the meal stays balanced.
Croissant logged, balance checked.
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Compare all Grains, Bread & Pasta: Grains, Bread & Pasta 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.