Are Chia Seeds Acidic or Alkaline?
Chia seeds (raw) are acid-forming: Positive PRAL: acid-forming after digestion.
Classification
At +6.3, chia seeds are acid-forming. They are very high in protein and phosphorus, and their calcium and magnesium aren't enough to outweigh that. This contradicts their reputation as an alkaline food. In everyday life, though, you only eat one or two tablespoons in pudding or muesli, and a banana or a few berries easily offset that amount.
In the Nuts & Seeds category, chia seeds (raw) rank #16 of 29, sorted from alkaline to acid-forming. More alkaline options include Walnuts (+5.6), Flaxseeds (+4.2), Sesame seeds (+3.9). More acid-forming are Cashew butter (+6.8), Peanut butter (+6.8), Roasted peanuts (salted) (+7.0).
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 chia seeds
A handful (30 g) of chia seeds adds +1.9 to your daily balance. These three bring it back; the grams shown offset exactly this serving.
Frequently Asked Questions
Are chia seeds 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: Chia seeds (raw) have a PRAL of +6.3 per 100 g, so they count as acid-forming in your daily acid-base balance.
How much kale offsets a handful (30 g) of chia seeds?
A handful (30 g) of chia seeds adds +1.9 to your daily balance. Kale (fresh) has −11.7 per 100 g, so about 20 g of kale offset this serving.
Do I have to avoid chia seeds on an alkaline diet?
No. What counts is the balance of the whole day, not a single food. Chia seeds are acid-forming; with enough vegetables, potatoes and fruit on the same plate, the meal stays balanced.
Chia Seeds logged, balance checked.
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Compare all Nuts & Seeds: Nuts & Seeds 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.