Is White Toast Bread Acidic or Alkaline?
White toast bread (baked) is slightly acid-forming: Positive PRAL: acid-forming after digestion.
Classification
White toast comes in at +3.9 and is moderately acid-forming because white flour brings protein and phosphorus and hardly any potassium. Wholemeal toast is only slightly higher at +4.3. For your acid-base balance the choice makes little difference, but for fiber it does. Two slices topped with tomato and cucumber end up close to zero in total.
In the Grains, Bread & Pasta category, white toast bread (baked) ranks #50 of 121, sorted from alkaline to acid-forming. More alkaline options include Flatbread (+3.8), White bread (+3.7), Ciabatta (+3.7). More acid-forming are Corn pasta (+3.9), Rice flour (+4.0), Baguette (+4.1).
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 white toast bread
Two slices (100 g) of white toast bread adds +3.9 to your daily balance. These three bring it back; the grams shown offset exactly this serving.
Frequently Asked Questions
Is white toast bread 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: White toast bread (baked) has a PRAL of +3.9 per 100 g, so it counts as slightly acid-forming in your daily acid-base balance.
How much kale offsets two slices (100 g) of white toast bread?
Two slices (100 g) of white toast bread adds +3.9 to your daily balance. Kale (fresh) has −11.7 per 100 g, so about 30 g of kale offset this serving.
Do I have to avoid white toast bread on an alkaline diet?
No. What counts is the balance of the whole day, not a single food. White toast bread is slightly acid-forming; with enough vegetables, potatoes and fruit on the same plate, the meal stays balanced.
White Toast Bread 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.