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  3. Selenium vs Magnesium

Selenium vs Magnesium

TL;DR

Quick comparison: Selenium and Magnesium have 0 overlapping categories and appear together in 22 products.

  • •Choose Selenium if: Essential trace mineral critical for antioxidant defense (selenoproteins), thyro...
  • •Choose Magnesium if: Essential mineral involved in over 300 enzymatic reactions including energy prod...
  • •Take both if: You want comprehensive coverage across 0 shared categories.
564 products
analyzed in our comprehensive supplement database
Source: MoodStack Database (2026)

Side-by-Side Comparison

FeatureSeleniumMagnesium
Typemineralmineral
Common Dosage55 mcg daily310-420 mg daily
Best BioavailabilityL-Selenomethionine (90%)Magnesium Bisglycinate (85%)
Categories37
Available Products00

Selenium

Typemineral
Common Dosage55 mcg daily
Best BioavailabilityL-Selenomethionine (90%)
Categories3
Available Products0

Magnesium

Typemineral
Common Dosage310-420 mg daily
Best BioavailabilityMagnesium Bisglycinate (85%)
Categories7
Available Products0

Can You Take Both?

Yes, Selenium and Magnesium can typically be taken together. In fact, we found 22 products in our database that contain both supplements, suggesting they complement each other well.

Key Differences

Selenium

Essential trace mineral critical for antioxidant defense (selenoproteins), thyroid hormone metabolism, and immune function.

Categories:

ImmunitySkin, Hair & NailsDetox & Liver

Common Forms:

  • • L-Selenomethionine (90% bioavailability)
  • • Selenomethionine (90% bioavailability)
  • • Selenium yeast (80% bioavailability)

Magnesium

Essential mineral involved in over 300 enzymatic reactions including energy production, protein synthesis, muscle/nerve function, and blood pressure regulation.

Categories:

Muscle GainSleepRecoveryVitalityStress & MoodHeart HealthHormonal Health

Common Forms:

  • • Magnesium Bisglycinate (85% bioavailability)
  • • Magnesium Taurate (80% bioavailability)
  • • DiMagnesium Malate (75% bioavailability)

Products Containing Both Selenium and Magnesium

We found 12 products that combine both supplements:

Transparent Labs Multivitamin

Transparent Labs Multivitamin

Transparent Labs

$44.99Score: 87/100
Essential Multivitamin

Essential Multivitamin

Momentous

$39.95Score: 86/100
Multi for Her 50+ Tablets

Multi for Her 50+ Tablets

Nature Made

$12.99Score: 86/100
Multi for Him Tablets

Multi for Him Tablets

Nature Made

$11.49Score: 86/100
Multi for Him 50+ Tablets

Multi for Him 50+ Tablets

Nature Made

$12.99Score: 86/100
Daily Multi Vitamins & Minerals

Daily Multi Vitamins & Minerals

Kirkland Signature

$12.99Score: 85/100
Elite Multivitamin

Elite Multivitamin

Gorilla Mind

$44.99Score: 85/100
Multi for Her Tablets

Multi for Her Tablets

Nature Made

$12.49Score: 84/100
Multivitamin Complete Tablets with Iron

Multivitamin Complete Tablets with Iron

Nature Made

$9.99Score: 83/100
Adult 50+ Mature Multi Vitamins & Minerals

Adult 50+ Mature Multi Vitamins & Minerals

Kirkland Signature

$12.99Score: 82/100
AG1 Next Gen

AG1 Next Gen

AG1

$79Score: 78/100
Centrum Women Multivitamin/Multimineral Supplement

Centrum Women Multivitamin/Multimineral Supplement

Centrum

$18.73Score: 77/100

Frequently Asked Questions

What is the difference between Selenium and Magnesium?

Selenium and Magnesium are both important supplements with distinct properties. Selenium Essential trace mineral critical for antioxidant defense (selenoproteins), thyroid hormone metabolism, and immune function., while Magnesium Essential mineral involved in over 300 enzymatic reactions including energy production, protein synthesis, muscle/nerve function, and blood pressure regulation..

Can I take Selenium and Magnesium together?

Based on our analysis of 22 products that contain both, yes, Selenium and Magnesium can typically be taken together. However, always consult with a healthcare provider before combining supplements.

Which is more popular: Selenium or Magnesium?

In our database of 564 products, Selenium appears in 35 products, while Magnesium appears in 82 products.

Related Comparisons & Products

What is Selenium?What is Magnesium?Vitamin B6 vs MagnesiumSodium vs MagnesiumVitamin E vs SeleniumTransparent Labs Multivitamin (contains both)Essential Multivitamin (contains both)Multi for Him Tablets (contains both)

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any supplement regimen.