Are Corn Grits (Polenta) Acidic or Alkaline?
Corn grits (polenta) (cooked) are slightly acid-forming: Positive PRAL: acid-forming after digestion.
Classification
Polenta is acid-forming at +3.7 even though whole corn kernels are alkaline. Grinding corn into grits removes the germ and hull along with their potassium, while the protein and phosphorus of the endosperm remain. As a side dish, it sits slightly below cooked pasta. Topped with a mushroom ragout or roasted vegetables, the plate becomes more balanced.
In the Grains, Bread & Pasta category, corn grits (polenta) (cooked) rank #44 of 121, sorted from alkaline to acid-forming. More alkaline options include Sourdough (starter from rye flour) (+3.6), Multigrain roll (+3.5), Croissant (+3.4). More acid-forming are Spelt pasta (+3.7), Parboiled rice (+3.7), Ciabatta (+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 corn grits (polenta)
A small side (100 g) of corn grits (polenta) adds +3.7 to your daily balance. These three bring it back; the grams shown offset exactly this serving.
Frequently Asked Questions
Are corn grits (polenta) 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: Corn grits (polenta) (cooked) have a PRAL of +3.7 per 100 g, so they count as slightly acid-forming in your daily acid-base balance.
How much lamb's lettuce offsets a small side (100 g) of corn grits (polenta)?
A small side (100 g) of corn grits (polenta) adds +3.7 to your daily balance. Lamb's lettuce (fresh) has −8.3 per 100 g, so about 40 g of lamb's lettuce offset this serving.
Do I have to avoid corn grits (polenta) on an alkaline diet?
No. What counts is the balance of the whole day, not a single food. Corn grits (polenta) are slightly acid-forming; with enough vegetables, potatoes and fruit on the same plate, the meal stays balanced.
Corn Grits (Polenta) 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.