Potassium

    Written by:
    Thomas Solomon

    Fact-checked

    by:

    Nick Milazzo
    Last Updated: March 14, 2024

    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.

    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 years2000 mg/day2000 mg/day--
    Children 4–8 years2300 mg/day2300 mg/day--
    Children 9–13 years2500 mg/day2300 mg/day--
    Teens 14–18 years3000 mg/day2300 mg/day2600 mg/day2500 mg/day
    Adult 19–50 years3400 mg/day2600 mg/day2900 mg/day2800 mg/day
    Adult 51+ years3400 mg/day2600 mg/day--

    Some evidence suggests that dietary potassium insufficiency might be common: the global mean potassium intake has been estimated at 2250 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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    Examine Database References

    1. Bone Mineral Density - H Lambert, L Frassetto, J B Moore, D Torgerson, R Gannon, P Burckhardt, S Lanham-NewThe effect of supplementation with alkaline potassium salts on bone metabolism: a meta-analysisOsteoporos Int.(2015 Jan 9)
    2. Blood Pressure - Filippini T, Violi F, D'Amico R, Vinceti MThe effect of potassium supplementation on blood pressure in hypertensive subjects: A systematic review and meta-analysis.Int J Cardiol.(2017-Mar-01)
    3. Blood Pressure - Jalal Poorolajal, Fatemeh Zeraati, Ali Reza Soltanian, Vida Sheikh, Elham Hooshmand, Akram MalekiOral potassium supplementation for management of essential hypertension: A meta-analysis of randomized controlled trialsPLoS One.(2017 Apr 18)