Vitamin B12 vs Iron

TL;DR

Quick comparison: Vitamin B12 and Iron have 2 overlapping categories and appear together in 20 products.

•Choose Vitamin B12 if: Water-soluble vitamin (cobalamin) containing cobalt, essential for DNA synthesis...
•Choose Iron if: Essential mineral critical for oxygen transport (hemoglobin), energy production,...
•Take both if: You want comprehensive coverage across 2 shared categories.

564 products

analyzed in our comprehensive supplement database

Source: MoodStack Database (2026)

Side-by-Side Comparison

Feature	Vitamin B12	Iron
Type	vitamin	mineral
Common Dosage	2.4 mcg daily	8-18 mg daily
Best Bioavailability	Methylcobalamin (70%)	Ferrous Bisglycinate (60%)
Categories	4	2
Available Products	0	0

Vitamin B12

Typevitamin

Common Dosage2.4 mcg daily

Best BioavailabilityMethylcobalamin (70%)

Categories4

Available Products0

Iron

Typemineral

Common Dosage8-18 mg daily

Best BioavailabilityFerrous Bisglycinate (60%)

Categories2

Available Products0

Can You Take Both?

Yes, Vitamin B12 and Iron can typically be taken together. In fact, we found 20 products in our database that contain both supplements, suggesting they complement each other well.

Both supplements share 2 common categories, indicating they may work synergistically for similar health goals.

Key Differences

Vitamin B12

Water-soluble vitamin (cobalamin) containing cobalt, essential for DNA synthesis, neurological function, and red blood cell formation.

Categories:

Vitality Endurance Focus & Cognition Stress & Mood

Common Forms:

• Methylcobalamin (70% bioavailability)
• Hydroxycobalamin (60% bioavailability)
• Adenosylcobalamin (50% bioavailability)

Iron

Essential mineral critical for oxygen transport (hemoglobin), energy production, and cellular function. Most common nutritional deficiency worldwide.

Categories:

Vitality Endurance

Common Forms:

• Ferrous Bisglycinate (60% bioavailability)
• Heme iron polypeptide (35% bioavailability)
• Ferrous fumarate (30% bioavailability)

Shared Categories

Both Vitamin B12 and Iron are used for these health goals:

🌟Vitality 🏃‍♂️Endurance

Products Containing Both Vitamin B12 and Iron

We found 12 products that combine both supplements:

Transparent Labs Multivitamin

Transparent Labs

$44.99Score: 87/100

Prenatal Multi + DHA Softgels

Nature Made

$22.99Score: 86/100

Iron+

Momentous

$14.97Score: 86/100

Elite Multivitamin

Gorilla Mind

$44.99Score: 85/100

Multi for Her Tablets

Nature Made

$12.49Score: 84/100

THE Pre-Workout

Myprotein

$39.99Score: 84/100

Vitamin Code Raw One for Women

Garden of Life

$30.09Score: 83/100

mykind Organics Women's Multi

Garden of Life

$41.59Score: 83/100

Multivitamin Complete Tablets with Iron

Nature Made

$9.99Score: 83/100

Dr.Bear Multivitamin Mineral (Daiso)

Dr.Bear

$5000Score: 78/100

Centrum Women Multivitamin/Multimineral Supplement

Centrum

$18.73Score: 77/100

ELEMENTS - Multivitamines & Mineraux

Raptor Nutrition

$28Score: 76/100

Frequently Asked Questions

What is the difference between Vitamin B12 and Iron?

Vitamin B12 and Iron are both important supplements with distinct properties. Vitamin B12 Water-soluble vitamin (cobalamin) containing cobalt, essential for DNA synthesis, neurological function, and red blood cell formation., while Iron Essential mineral critical for oxygen transport (hemoglobin), energy production, and cellular function. Most common nutritional deficiency worldwide..

Can I take Vitamin B12 and Iron together?

Based on our analysis of 20 products that contain both, yes, Vitamin B12 and Iron can typically be taken together. However, always consult with a healthcare provider before combining supplements.

Which is more popular: Vitamin B12 or Iron?

In our database of 564 products, Vitamin B12 appears in 90 products, while Iron appears in 33 products.

Related Comparisons & Products

What is Vitamin B12?What is Iron?Vitamin B6 vs Iron Fat vs Iron Vitamin E vs Iron Transparent Labs Multivitamin (contains both)Iron+ (contains both)Prenatal Multi + DHA Softgels (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.