Potassium

    Written by:
    Thomas Solomon, Katie Jantz

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    by:

    Nick Milazzo, Giulia Guerrini
    Last Updated: March 24, 2026

    Potassium is essential for normal bodily function. It is obtained in the diet and found in several foods. Potassium-containing drugs are sometimes used to treat certain conditions. Potassium salts (e.g. potassium chloride) are used in reduced-sodium added-potassium salt substitute interventions and in sodium restriction diets to help treat high blood pressure.

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    Overview

    Dosage Information

    The adequate intake (AI) for potassium in people without known health conditions — i.e., the daily amount assumed to ensure nutritional adequacy — is as follows:[1]

    AgeMaleFemalePregnantLactating
    Birth to 6 months400 mg/day400 mg/day--
    Infants 7–12 months860 mg/day860 mg/day--
    Children 1–3 years2,000 mg/day2,000 mg/day--
    Children 4–8 years2,300 mg/day2,300 mg/day--
    Children 9–13 years2,500 mg/day2,300 mg/day--
    Teens 14–18 years3,000 mg/day2,300 mg/day2,600 mg/day2,500 mg/day
    Adult 19–50 years3,400 mg/day2,600 mg/day2,900 mg/day2,800 mg/day
    Adult 51+ years3,400 mg/day2,600 mg/day--

    Some evidence suggests that dietary potassium insufficiency might be common: the global mean potassium intake has been estimated at 2,250 mg/day, with only 35% of adults estimated to be achieving adequate intakes.[2]

    Potassium is found in many foods, including fruits, vegetables, legumes, meat, and animal products.[1][3] Consult the FoodData Central database to check the amount of potassium in the foods you eat.

    Potassium supplements are generally safe for consumption and are unlikely to cause adverse effects if used within the recommended dosage.[4]

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