Is White Bread Acidic or Alkaline?
White bread (baked) is slightly acid-forming: Positive PRAL: acid-forming after digestion.
Classification
White bread comes in at +3.7 and is moderately acid-forming because the refined flour brings protein and phosphorus but hardly any potassium. Wholemeal bread is even a little lower at +2.6, because the outer layers of the grain also supply alkaline minerals. A 40 g slice adds roughly +1.5. The topping decides the rest: cheese pushes the balance up, while tomato or avocado push back.
In the Grains, Bread & Pasta category, white bread (baked) ranks #48 of 121, sorted from alkaline to acid-forming. More alkaline options include Parboiled rice (+3.7), Spelt pasta (+3.7), Corn grits (polenta) (+3.7). More acid-forming are Flatbread (+3.8), White toast bread (+3.9), Corn pasta (+3.9).
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 bread
Two slices (100 g) of white bread adds +3.7 to your daily balance. These three bring it back; the grams shown offset exactly this serving.
Frequently Asked Questions
Is white 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 bread (baked) has a PRAL of +3.7 per 100 g, so it counts as slightly acid-forming in your daily acid-base balance.
How much lamb's lettuce offsets two slices (100 g) of white bread?
Two slices (100 g) of white bread adds +3.7 to your daily balance. Lamb's lettuce (fresh) has −8.3 per 100 g, so about 50 g of lamb's lettuce offset this serving.
Do I have to avoid white bread on an alkaline diet?
No. What counts is the balance of the whole day, not a single food. White bread is slightly acid-forming; with enough vegetables, potatoes and fruit on the same plate, the meal stays balanced.
White 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.