Selenium vs Iodine

TL;DR

Quick comparison: Selenium and Iodine have 0 overlapping categories and appear together in 20 products.

•Choose Selenium if: Essential trace mineral critical for antioxidant defense (selenoproteins), thyro...
•Choose Iodine if: Essential trace mineral critical for thyroid hormone synthesis....
•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

Feature	Selenium	Iodine
Type	mineral	mineral
Common Dosage	55 mcg daily	150 mcg daily
Best Bioavailability	L-Selenomethionine (90%)	Potassium iodide (95%)
Categories	3	0
Available Products	0	0

Selenium

Typemineral

Common Dosage55 mcg daily

Best BioavailabilityL-Selenomethionine (90%)

Categories3

Available Products0

Iodine

Typemineral

Common Dosage150 mcg daily

Best BioavailabilityPotassium iodide (95%)

Categories0

Available Products0

Can You Take Both?

Yes, Selenium and Iodine can typically be taken together. In fact, we found 20 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:

Immunity Skin, Hair & Nails Detox & Liver

Common Forms:

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

Iodine

Essential trace mineral critical for thyroid hormone synthesis.

Categories:

Common Forms:

• Potassium iodide (95% bioavailability)
• Sodium iodide (90% bioavailability)
• Kelp (seaweed) (80% bioavailability)

Products Containing Both Selenium and Iodine

We found 12 products that combine both supplements:

Essential Capsules

Blueprint

Score: 86/100

Essential Multivitamin

Momentous

$39.95Score: 86/100

Multi for Him Tablets

Nature Made

$11.49Score: 86/100

Multi for Him 50+ Tablets

Nature Made

$12.99Score: 86/100

Multi for Her 50+ Tablets

Nature Made

$12.99Score: 86/100

Daily Multi Vitamins & Minerals

Kirkland Signature

$12.99Score: 85/100

Elite Multivitamin

Gorilla Mind

$44.99Score: 85/100

Multi for Her Tablets

Nature Made

$12.49Score: 84/100

Multivitamin Complete Tablets with Iron

Nature Made

$9.99Score: 83/100

Adult 50+ Mature Multi Vitamins & Minerals

Kirkland Signature

$12.99Score: 82/100

Centrum Women Multivitamin/Multimineral Supplement

Centrum

$18.73Score: 77/100

Centrum Silver Women 50+ Multivitamin/Multimineral Supplement

Centrum

$19.48Score: 76/100

Frequently Asked Questions

What is the difference between Selenium and Iodine?

Selenium and Iodine are both important supplements with distinct properties. Selenium Essential trace mineral critical for antioxidant defense (selenoproteins), thyroid hormone metabolism, and immune function., while Iodine Essential trace mineral critical for thyroid hormone synthesis..

Can I take Selenium and Iodine together?

Based on our analysis of 20 products that contain both, yes, Selenium and Iodine can typically be taken together. However, always consult with a healthcare provider before combining supplements.

Which is more popular: Selenium or Iodine?

In our database of 564 products, Selenium appears in 35 products, while Iodine appears in 34 products.

Related Comparisons & Products

What is Selenium?What is Iodine?Vitamin B6 vs Iodine Folate vs Iodine Vitamin E vs Selenium Essential Capsules (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.