Skip to navigation menu Skip to content
  • MyChart
  • Telemedicine
  • Healthcare Professionals
  • Careers
  • Alerts
  • Donate Now
  • I want to …
      • Go to MyChart
      • Find a Doctor
      • Make an Appointment
      • Find a Location
      • Visit ED or Urgent Care
      • Get Driving Directions
      • Refill a Prescription
      • Contact Children's
      • Pay My Bill
      • Estimate My Cost
      • Apply for Financial Assistance
      • Request My Medical Records
      • Find Patient Education
      • Volunteer
      • Donate
      • Refer and Manage a Patient
Search
Search
  • Your Visit
  • Conditions
  • Clinics
  • Research
  • Health & Safety
  • Giving
  • Press Room
  • I want to …
      • Go to MyChart
      • Find a Doctor
      • Make an Appointment
      • Find a Location
      • Visit ED or Urgent Care
      • Get Driving Directions
      • Refill a Prescription
      • Contact Children's
      • Pay My Bill
      • Estimate My Cost
      • Apply for Financial Assistance
      • Request My Medical Records
      • Find Patient Education
      • Volunteer
      • Donate
      • Refer and Manage a Patient
Donate Now
  • Main Menu
  • On This Page

    Jump to a section on this page:

Magnesium

  • Español PDF

Magnesium is a mineral stored in our bones and muscles. The body needs it to do many of its basic functions.

Why does the body need magnesium?

Magnesium helps muscles move and relax and nerves to function. It is also important for bone health.

Some medicines or health problems cause the body to lose more magnesium than usual. This can cause muscle tremors or spasms, muscle weakness, or loss of balance.

How much magnesium does my child need?

Most people can get enough magnesium by eating a healthy diet that includes a variety of whole grains, vegetables, nuts and beans.

What foods have magnesium?

Great sources:
100 to 150 milligrams (mg) of magnesium per serving

  • Kellogg’s All-Bran cereal (1/2 cup)
  • Pumpkin seeds, roasted (1/4 cup)
  • Chia seeds (1/4 cup)
  • Quinoa, cooked (1 cup)
  • Spinach, boiled (1 cup)

Good sources:
50 to 100 mg of magnesium per serving

  • Granola cereals (1/2 cup)
  • Soymilk (1 cup)
  • Baked beans and black beans (1/2 cup)
  • Navy beans, canned (1/2 cup)
  • Peanut butter (2 tablespoons)
  • Peanuts (1/4 cup)
  • Roasted cashews (1/4 cup)
  • Pecans, almonds, sunflower seeds, or walnuts (1/2 cup)
  • Avocado (1 medium)
  • Swiss chard, cooked (1/2 cup)
  • Lentils (1 cup)
  • Lima beans (1 cup)
  • Brown rice, cooked (1 cup)
  • Dried figs (1/2 cup)
  • Carnation Instant Breakfast (1 packet)
  • Boost (8 ounces)

OK sources:
25 to 50 mg of magnesium per serving

  • Cheerios (1 cup)
  • Tofu (4 ounces)
  • Instant oatmeal (1 packet)
  • Cracked wheat bread (3 slices)
  • Chicken (6 ounces)
  • Baked potato with skin (1/2 medium)
  • Halibut, salmon, tuna, shrimp, crab (3 ounces)
  • Yogurt (8 ounces)
  • Artichoke, boiled (1 medium)
  • Ripe banana (1 small)
  • Raisins (2/3 cup)

Who needs a magnesium supplement?

If the body does not get enough magnesium from food, a healthcare provider may suggest a supplement. Talk to your healthcare provider before taking a magnesium supplement or giving a supplement to your child.

To Learn More

  • Nutrition
    206-987-4758
  • Ask your child’s healthcare provider
  • seattlechildrens.org/patient-education 

Free Interpreter Services

  • In the hospital, ask your nurse.
  • From outside the hospital, call the toll-free Family Interpreting Line, 1-866-583-1527. Tell the interpreter the name or extension you need.
Seattle Children's Hospital

Seattle Children’s offers free interpreter services for patients, family members and legal representatives who are deaf or hard of hearing or speak a language other than English. Seattle Children’s will make this information available in alternate formats upon request. Call the Family Resource Center at 206-987-2201. This handout has been reviewed by clinical staff at Seattle Children’s. However, your needs are unique. Before you act or rely upon this information, please talk with your healthcare provider.

© 2026 Seattle Children’s, Seattle, Washington. All rights reserved.

09/01/2026
PE785
Patient and Family Education | Nutrition

Download Instructions

To download as a PDF, choose "Save as a PDF" in the print dialog, then click "Save".

screenshot of print dialog

About Us
  • About Seattle Children’s
  • Contact Us
  • Locations
  • Visiting Seattle Children’s
  • Press Releases
  • Growing for Future Grown-Ups
  • Price Transparency
Community
  • Healthcare Professionals
  • Events
  • Classes
  • Volunteering
Experience and Outcomes
  • Advancing Healthcare Experience and Outcomes
  • Values
  • Nondiscrimination and Interpreters Notice
  • Accessibility and Special Needs
About This Site
  • About This Website
  • Feedback
  • Terms of Use
  • Privacy
  • My Health My Data
  • Notice of Privacy Practices
  • Employees
  • Working From Home and Remote Access Help
  • Vendors

©2026 Seattle Children’s Hospital

4800 Sand Point Way NE, Seattle, WA 98105

206-987-2000 866-987-2000 (toll-free) 206-987-0391 (TTY)

U.S. News & World Report Best Children's Hospitals Honor Roll Badge Forbes America's Best Large Employers Magnet Recognized Nursing Program Children's Miracle Network Hospitals

Seattle Children’s complies with applicable federal and other civil rights laws and does not discriminate, exclude people or treat them differently based on race, color, religion (creed), sex, gender identity or expression, sexual orientation, national origin (ancestry), age, disability, or any other status protected by applicable federal, state or local law. Financial assistance for medically necessary services is based on family income and hospital resources and is provided to children under age 21 whose primary residence is in Washington, Alaska, Montana or Idaho.