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Are electrolytes safe for kids and teens?

Written by the Full Measure editorial team, which sells supplements. Approved for publication by the Full Measure owners. Updated .

Drafted with AI assistance from the sources listed below. How we write these

Quick answer

FDA says recommended sodium limits for children under 14 are lower than the adult limit of 2,300 mg a day, and MedlinePlus says oral rehydration solutions made for children are sold without a prescription. The sources checked do not rate sports electrolyte powders for kids. Ask your doctor first.1,2

Key facts

  • FDA says the adult sodium limit is less than 2,300 mg a day and that recommended limits for children under 14 are even lower.1
  • NIH lists potassium amounts of 2,000 mg a day at ages 1 to 3 and 3,000 mg for teenage boys, and sets no upper limit for healthy people.3,4
  • NIH sets upper limits for magnesium from supplements and medicines of 65 mg at ages 1 to 3, 110 mg at 4 to 8 and 350 mg at 9 to 18.5
  • MedlinePlus says infants and young children are more likely to become dehydrated because of diarrhea or vomiting, and oral rehydration solutions for children are sold without a prescription.2
  • MedlinePlus says some sports drinks have a lot of sugar, so care is needed not to drink too much of them.2

What do the sources say about sodium for children?

FDA says sodium is needed in relatively small amounts unless there is substantial sweating, and that adults should limit sodium to less than 2,300 mg a day. It adds that for children under age 14, the recommended limits are even lower.1

FDA counts a serving with 20% or more of the sodium Daily Value as high and 5% or less as low. Because the Daily Value on a label is 2,300 mg and children's limits are lower, the percentage on a label understates a child's share, so check the amount per serving before giving a child one.1

What about potassium and magnesium by age?

NIH's consumer sheet lists 2,000 mg of potassium a day at ages 1 to 3, 2,300 mg at 4 to 8, 2,500 mg for boys and 2,300 mg for girls aged 9 to 13, and 3,000 mg for teen boys and 2,300 mg for teen girls. It sets no upper limit for healthy people, but kidney disease or medicines that hold potassium change that.3,4

For magnesium, NIH's upper limit from supplements and medicines, not counting food, is 65 mg at ages 1 to 3, 110 mg at 4 to 8 and 350 mg at ages 9 to 18. High intakes can cause diarrhea, nausea and abdominal cramping, and none is set for infants.5

High intakes of magnesium from supplements can cause diarrhea, nausea and abdominal cramping.5

What do the sources say about children and lost fluids?

MedlinePlus says infants and young children are more likely to become dehydrated because they are more likely to have diarrhea or vomiting. In infants the signs include a dry mouth and tongue, crying without tears, no wet diapers for 3 hours or more, a high fever, unusual sleepiness, irritability and sunken eyes.2

It says the treatment is replacing the fluids and electrolytes that were lost, that there are oral rehydration solutions for children that can be bought without a prescription, and that severe cases need medical help. It lists confusion, fainting, lack of urination, rapid heartbeat and rapid breathing as reasons to get help right away. Ask your doctor or pharmacist which solution suits a sick child.2

What about sports electrolyte powders and named products?

The sources checked do not evaluate sports electrolyte powders or named brands for children. MedlinePlus says sports drinks may help when minerals are lost in sweat, but that some contain a lot of sugar.2

Drinking well beyond thirst during long exercise can dilute blood sodium, a condition called exercise-associated hyponatremia. Overdrinking is its most common cause, and severe cases are an emergency.6,7

Who should ask a doctor about electrolytes for a child or teen?

  • Anyone whose child has vomiting or diarrhea, since fluid loss from illness needs medical advice.2
  • Anyone whose child has a heart, kidney or liver condition or takes a regular medicine.4,8
  • Anyone considering a powder made for adults or athletes for a young child.1
  • Anyone whose teen trains for long periods in heat.9

Ask your doctor, and keep the label of any mix so the sodium, potassium and magnesium per serving can be checked.

Questions people ask

Are electrolytes safe for teens?

NIH lists potassium amounts for teens and sets no upper limit for healthy people, but FDA's sodium limits and NIH's magnesium limit still apply. Ask your doctor before a teen uses a mix every day.1,3,5

Is electrolytes good for teens?

MedlinePlus says sports drinks may help when minerals are lost in sweat, and that some have a lot of sugar. The sources checked do not rate powders for teens, so ask your doctor.2

Are electrolytes safe for kids to drink?

FDA says sodium limits for children under 14 are lower than the adult 2,300 mg a day, and MedlinePlus describes oral rehydration solutions made for children. Ask your doctor or pharmacist.1,2

Are electrolyte powders safe for kids?

The sources checked do not evaluate electrolyte powders or named brands for children. Read the sodium, potassium and magnesium per serving against the limits above and ask your doctor or pharmacist.1

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Sources

  1. U.S. Food and Drug Administration. Sodium in Your Diet: Use the Nutrition Facts Label and Reduce Your Intake. Content current as of March 5, 2024. Opened 2026-10-07.
  2. MedlinePlus, National Library of Medicine. Dehydration. Last updated December 29, 2023. Opened 2026-10-07.
  3. National Institutes of Health, Office of Dietary Supplements. Potassium: Fact Sheet for Consumers. Updated March 22, 2021. Opened 2026-10-07.
  4. National Institutes of Health, Office of Dietary Supplements. Potassium: Fact Sheet for Health Professionals. Updated June 2, 2022. Opened 2026-10-07.
  5. National Institutes of Health, Office of Dietary Supplements. Magnesium: Fact Sheet for Consumers. Updated March 22, 2021. Opened 2026-10-07.
  6. Hew-Butler T, Loi V, Pani A, Rosner MH. Exercise-Associated Hyponatremia: 2017 Update. Front Med (Lausanne). 2017;4:21. Opened 2026-10-07.
  7. MedlinePlus Medical Encyclopedia. Low blood sodium. Review date May 19, 2025. Opened 2026-10-07.
  8. MedlinePlus Medical Encyclopedia. Sodium in diet. Review date April 30, 2026. Opened 2026-10-07.
  9. MedlinePlus, National Library of Medicine. Fluid and Electrolyte Balance. Last updated May 16, 2024. Opened 2026-10-07.

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.