Potassium Citrate

Potassium Citrate is a tier 1 form of Potassium, used in 1,281 on-market products and providing 36.2% elemental potassium by weight.

Basis: K3C6H5O7 x H2O, monohydrate (standard USP form, MW 324.41; anhydrous at 0.383 also exists)

Why this tier: Treated as equivalent to potassium chloride (tier 1) on the basis of reported bioequivalence in absorption, but no primary absorption/PK comparison was verified; preferred clinically for kidney-stone prevention/urinary alkalinization rather than for an absorption advantage.

Source: none verified for the absorption claim (Sakhaee K et al. 1991, J Clin Endocrinol Metab 72(2):396-400, PMID 1899422 compares potassium salts on renal citrate excretion, not absorption)

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