Form Comparison

Potassium Bicarbonate vs Potassium Citrate

How potassium bicarbonate and potassium citrate differ in elemental content, absorption, tolerance, and cost.

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Quick verdict. Both supply an alkali load: bicarbonate directly, citrate after it is metabolized. Citrate is the form with kidney stone prevention data and prescription use; bicarbonate mostly shows up in effervescent electrolyte drinks and can cause gas. Choose citrate for stones and bicarbonate if you want potassium in a fizzy drink.

Side by Side

Potassium Bicarbonate Potassium Citrate
Elemental content 39.1% elemental potassium 36.2% elemental potassium
Absorption High High
How it is absorbed Soluble and well absorbed; supplies an alkali load directly. Fully soluble and nearly completely absorbed. Citrate is metabolized to bicarbonate, which alkalinizes the urine.
Typical dose Per product; often in effervescent drinks 99 mg per OTC capsule; 15-60 mEq daily by prescription
Common uses electrolyte drinks, alkali replacement kidney stone prevention, general supplementation
Side effects Gas and bloating. GI irritation at higher doses.
Cost Low Low
Also called None tripotassium citrate
Labels in index 31 188

When to Choose Potassium Bicarbonate

Choose potassium bicarbonate when you want potassium in an effervescent drink. Common in effervescent electrolyte tablets.

Potassium Bicarbonate

Choose potassium bicarbonate when you want potassium in an effervescent drink.

What to look for: Potassium Bicarbonate named on the Supplement Facts panel, with the amount per serving stated.

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When to Choose Potassium Citrate

Choose potassium citrate when you want an alkalinizing potassium source or have a history of kidney stones. Prescription extended-release citrate (Urocit-K) prevents calcium oxalate and uric acid stones.

Potassium Citrate

The alkalinizing form, and the prescription choice for stone prevention.

What to look for: As a supplement, 99 mg per capsule with the citrate form named. Prescription extended-release for stones.

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Products on Titrate

In Titrate's index of NIH label data, 31 labels named as potassium products list potassium bicarbonate and 188 list potassium citrate.

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Potassium does not have its own search category yet. Each product above links to its full label in the NIH database.

Related

References

NIH Office of Dietary Supplements. Potassium: Fact Sheet for Health Professionals.

Cook NR, Obarzanek E, Cutler JA, et al. Joint effects of sodium and potassium intake on subsequent cardiovascular disease: the Trials of Hypertension Prevention follow-up study. Arch Intern Med. 2009;169(1):32-40.

Aburto NJ, Hanson S, Gutierrez H, Hooper L, Elliott P, Cappuccio FP. Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses. BMJ. 2013;346:f1378.

Neal B, Wu Y, Feng X, et al. Effect of salt substitution on cardiovascular events and death. N Engl J Med. 2021;385(12):1067-1077.