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What to Know About Magnesium Supplements

~1 min read
Top Health #2Week of 2026-04-06
Reviewed by Dr. Younghun ChoLast reviewed April 23, 2026
Possible driver: New research on magnesium and anemiaPossible driver: Study on magnesium and kidney diseasePossible driver: Exploring magnesium in bone health

The 1-Minute Read

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Magnesium is a powerhouse mineral involved in more than 300 essential reactions in your body, from making protein and DNA to regulating muscle contractions and nerve signals. It's no wonder that magnesium supplements are popular for a wide range of health goals, including better sleep, reduced muscle soreness, and headache prevention. While it's a vital nutrient, the scientific backing for taking supplements for these specific issues is still developing, and results can vary from person to person. Recent research continues to explore magnesium's role in very specific health areas, such as its connection to iron levels in children, its status in people with kidney disease, and even its use in advanced medical materials for bone regeneration [1, 2, 3, 4]. However, these studies don't provide guidance for general supplement use. The key thing for consumers to know is that not all magnesium is the same. Different forms like glycinate, citrate, and oxide have different absorption rates and potential side effects. For instance, some forms are more likely to cause diarrhea than others. It is especially important for individuals with kidney conditions to be cautious with magnesium supplements [2]. Before you start taking magnesium, have a conversation with your healthcare provider to ensure it's appropriate and to choose the form that best fits your needs.

Why It Matters Right Now

Active Recall (Class II)

MICROBIAL CONTAMINATION OF NON-STERILE PRODUCTS - Presence of Acetobacter nitrogenifigens bacteria. — Pharma Nobis LLC

FDA details
Active Recall (Class II)

MICROBIAL CONTAMINATION OF NON-STERILE PRODUCTS - Presence of Acetobacter nitrogenifigens bacteria. — Pharma Nobis LLC

FDA details
Active Recall (Class I)

Product mix up: a foil pouch labeled "Magnesium Sulfate in Water for Injection, 4 g/100 mL" actually contained an IV bag of Tranexamic Acid instead. — Amneal Pharmaceuticals, LLC

FDA details
Active Recall (Class II)

Failed Impurities/Degradation Specifications: Out-of-Specification test results obtained for any individual unknown degradation product during Related Compounds testing during long term stability. — Zydus Pharmaceuticals (USA) Inc

FDA details
Active Recall (Class III)

Labeling: Not Elsewhere Classified - Wrong NDC number — Zydus Pharmaceuticals (USA) Inc

FDA details

Recent Research (last 30 days)

Key Takeaways

  • Magnesium is a critical mineral for nerve, muscle, and bone health.
  • Different forms like citrate, glycinate, and oxide have different primary uses.
  • The most common side effect of taking too much magnesium is diarrhea.
  • Individuals with kidney problems should consult a doctor before using. [2]
  • Always talk to a pharmacist to find the right type and dose for you.

Recommended Products

Top pharmacist-reviewed picks mentioned in this article.

1NOW Foods Magnesium Citrate
NOW Foods Magnesium Citrate
Buy · Amazon
2Jarrow Formulas MagMind Magnesium L-Threonate
Jarrow Formulas MagMind Magnesium L-Threonate
Buy · Amazon
3Nature Made Magnesium Oxide 250 mg
Nature Made Magnesium Oxide 250 mg
Buy · Amazon
4Thorne Magnesium Bisglycinate
Thorne Magnesium Bisglycinate
Buy · Amazon
5Doctor's Best High Absorption Magnesium (Glycinate Lysinate)
Doctor's Best High Absorption Magnesium (Glycinate Lysinate)
Buy · Amazon

Ingredients at a Glance

Top actives per product + what overlaps

NOW Foods Magnesium Citrate

  • Magnesium (from Magnesium Citrate)

Jarrow Formulas MagMind Magnesium L-Threonate

  • Magnesium L-Threonate (as Magtein®)

Nature Made Magnesium Oxide 250 mg

  • Magnesium Oxide

Thorne Magnesium Bisglycinate

  • Magnesium Bisglycinate

Doctor's Best High Absorption Magnesium (Glycinate Lysinate)

  • Magnesium Glycinate Lysinate Chelate

Safety Information

See a doctor if…

  • You have been diagnosed with kidney disease.
  • You experience persistent or severe diarrhea after starting.
  • You develop symptoms like nausea, vomiting, or muscle weakness.
  • You experience signs of an allergic reaction like a rash or hives.

Real-World Reports (FDA FAERS, past 12 months)

Reports for magnesium

fatigue (2,820)off-label use (2,786)diarrhoea (2,455)nausea (2,430)drug didn't work as expected (2,304)

These are voluntarily reported incidents, not rates. Higher numbers may reflect wider use, not higher risk.

Sources

Primary Sources

  1. [0]
    FDA Warnings — Acid Reducer

    FDA DailyMed: Acid Reducer

  2. [1]
    The association between serum trace elements and iron deficiency anemia in children and adolescents: a systematic review and meta-analysis.

    Mobasheri-Shiri M, Ramezanipour S, Azizi Z, et al., Hematology (Amsterdam, Netherlands), 2026-04-01 · 2026-04-01

  3. [2]
  4. [3]
    Revolutionizing Mg-based guided bone regeneration mesh derived from endogenous dentoalveolar bone augmentation.

    Li S, You M, Zheng H, et al., Bioactive materials, 2026-04-11 · 2026-04-11

  5. [4]
  6. [5]
  7. [6]
    NIH ODS — Vitamin C Fact Sheet

    NIH ODS — Vitamin C Fact Sheet

  8. [7]
    NIH ODS — Vitamin D Fact Sheet

    NIH ODS — Vitamin D Fact Sheet