Supplement Label Index

Potassium Citrate vs. Potassium Bicarbonate

Among 3,345 on-market potassium products with an identifiable primary form, 36.8% use Potassium Citrate (1,232 products) and 9.9% use Potassium Bicarbonate (332).

Potassium CitratePotassium Bicarbonate
Quality tierTier 1Tier 1
Potassium by weight36.2%39.1%
Share of market36.8%9.9%
On-market products1,232332
Median declared dose50 elemental mg
middle half: 30–99
110 elemental mg
middle half: 95–200
Most common brandsSource Naturals, Wonder Laboratories, Life ExtensionIsotonix, Nuun, Pure Essence Ionic-Fizz

Doses are declared per serving in elemental mg. “By weight” is the share of the ingredient that is the nutrient itself (e.g. elemental magnesium in a magnesium salt).

Why Potassium Citrate is tier 1

Reported bioequivalent in absorption to potassium chloride; preferred clinically for kidney-stone prevention/urinary alkalinization rather than for an absorption advantage.

Source: uncertain -- needs review for exact primary comparative-PK source

Why Potassium Bicarbonate is tier 1

Used at doses shown to reduce urinary calcium excretion and bone-resorption markers in older adults, implying good systemic delivery (not a head-to-head absorption comparison).

Source: Sebastian A et al., PMID 18940881

Tiers summarize published comparative bioavailability or outcome evidence for each form (see methodology). This page describes the market; it is not a recommendation to take either form. Talk to a clinician about what's right for you.

Other potassium comparisons