What is the best form of potassium?
2 forms compared by what actually reaches your bloodstream.
Ranked by absorption
Higher means more of the dose reaches youShort answer
Potassium Citrate absorbs best — 95%.
Kidney stone prevention & pH balance. Typical dose 15-60 mEq, about $40 a month. The cheapest option is Iodine (Potassium Iodide) at $8, but it only absorbs at 95%.
Every form side by side
| Form | Absorbed | Safety | Per month | Dose | Evidence |
|---|---|---|---|---|---|
| Potassium Citrate | 95% | 6/10 | $40 | 15-60 mEq | A |
| Iodine (Potassium Iodide) | 95% | 6/10 | $8 | 150-300 mcg | A |
Head to head
How to read this
- Absorption is the share of the dose that reaches your bloodstream — the number that decides whether the milligrams on the label mean anything.
- A cheaper form at half the absorption is not cheaper per unit delivered.
- Safety here reflects tolerance at normal doses, not toxicity risk.
- Evidence A means the form itself was studied, not just the parent compound.
Common questions
What is the best form of potassium?
Potassium Citrate — it absorbs at 95%, the highest of the 2 forms here. Kidney stone prevention & pH balance. Typical dose 15-60 mEq.
Which form of potassium is worst absorbed?
Iodine (Potassium Iodide) at 95%. It is usually the cheapest option, which is exactly why it ends up in budget products.
Is the expensive form of potassium worth it?
Compare per unit delivered, not per bottle. Iodine (Potassium Iodide) costs $8 a month at 95% absorption, Potassium Citrate costs $40 at 95%.
How much potassium should you take?
Doses differ by form: Potassium Citrate 15-60 mEq; Iodine (Potassium Iodide) 150-300 mcg.