Potassium Citrate vs. Potassium Aspartate
Among 3,345 on-market potassium products with an identifiable primary form, 36.8% use Potassium Citrate (1,232 products) and 9.3% use Potassium Aspartate (310).
| Potassium Citrate | Potassium Aspartate | |
|---|---|---|
| Quality tier | Tier 1 | Tier 2 |
| Potassium by weight | 36.2% | 22.8% |
| Share of market | 36.8% | 9.3% |
| On-market products | 1,232 | 310 |
| Median declared dose | 50 elemental mg middle half: 30–99 | 50 elemental mg middle half: 25–99 |
| Most common brands | Source Naturals, Wonder Laboratories, Life Extension | Douglas Laboratories, Bluebonnet, Pure Encapsulations |
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
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)
Why Potassium Aspartate is tier 2
No dedicated comparative bioavailability study located; assumed acceptable given the label cross-check.
Source: none located (no comparative bioavailability study found)
Other potassium comparisons
- Potassium Citrate vs. Potassium Chloride
- Potassium Citrate vs. Potassium Bicarbonate
- Potassium Citrate vs. Potassium Gluconate
- Potassium Chloride vs. Potassium Bicarbonate
- Potassium Chloride vs. Potassium Aspartate
- Potassium Chloride vs. Potassium Gluconate
- Potassium Bicarbonate vs. Potassium Aspartate
- Potassium Bicarbonate vs. Potassium Gluconate
- Potassium Aspartate vs. Potassium Gluconate