Supplement Label Index

Potassium Citrate vs. Potassium Chloride

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

Potassium CitratePotassium Chloride
Quality tierTier 1Tier 1
Potassium by weight36.2%52.4%
Share of market36.8%36.8%
On-market products1,2321,232
Median declared dose50 elemental mg
middle half: 30–99
70 elemental mg
middle half: 30–99
Most common brandsSource Naturals, Wonder Laboratories, Life ExtensionNOW, DC, Vitamin World

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 Chloride is tier 1

Standard reference form used in essentially all major clinical hypokalemia/blood-pressure trials.

Source: Whelton PK et al. 1997, JAMA 277(20):1624-32, PMID 9168293

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