Comparison
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.
565 products
analyzed in our comprehensive supplement database
Source · MoodStack Database (2026)
Side-by-side comparison
| Feature | Selenium | Magnesium |
|---|---|---|
| Type | mineral | mineral |
| Common Dosage | 55 mcg daily | 310-420 mg daily |
| Best Bioavailability | L-Selenomethionine (90%) | Magnesium Bisglycinate (85%) |
| Categories | 3 | 7 |
| Available Products | 0 | 0 |
Selenium
Magnesium
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
Option A
Selenium
Essential trace mineral critical for antioxidant defense (selenoproteins), thyroid hormone metabolism, and immune function.
Categories
Common forms
- L-Selenomethionine · 90% bioavailability
- Selenomethionine · 90% bioavailability
- Selenium yeast · 80% bioavailability
Option B
Magnesium
Essential mineral involved in over 300 enzymatic reactions including energy production, protein synthesis, muscle/nerve function, and blood pressure regulation.
Common forms
- Magnesium Bisglycinate · 85% bioavailability
- Magnesium Taurate · 80% bioavailability
- DiMagnesium Malate · 75% bioavailability
Products with both Selenium and Magnesium
We found 12 products that combine both supplements:
Transparent Labs Multivitamin
Essential Multivitamin
Multi for Her 50+ Tablets
Multi for Him Tablets
Multi for Him 50+ Tablets
Daily Multi Vitamins & Minerals
Elite Multivitamin
Multi for Her Tablets
Multivitamin Complete Tablets with Iron
Adult 50+ Mature Multi Vitamins & Minerals
AG1 Next Gen
Centrum Women Multivitamin/Multimineral Supplement
Frequently asked
What is the difference between Selenium and Magnesium?
Can I take Selenium and Magnesium together?
Which is more popular: Selenium or Magnesium?
Related comparisons & products
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.