Vitamin K vs Vitamin B9

TL;DR

Quick comparison: Vitamin K and Vitamin B9 have 0 overlapping categories and appear together in 9 products.

•Choose Vitamin K if: Fat-soluble vitamin essential for blood clotting and bone metabolism. K1 from pl...
•Choose Vitamin B9 if: Water-soluble vitamin (folate) essential for DNA synthesis, cell division, and m...
•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	Vitamin K	Vitamin B9
Type	vitamin	vitamin
Common Dosage	90-120 mcg daily	400 mcg DFE daily
Best Bioavailability	MK-7 (90%)	Folic acid (95%)
Categories	0	0
Available Products	0	0

Vitamin K

Typevitamin

Common Dosage90-120 mcg daily

Best BioavailabilityMK-7 (90%)

Categories0

Available Products0

Vitamin B9

Typevitamin

Common Dosage400 mcg DFE daily

Best BioavailabilityFolic acid (95%)

Categories0

Available Products0

Can You Take Both?

Yes, Vitamin K and Vitamin B9 can typically be taken together. In fact, we found 9 products in our database that contain both supplements, suggesting they complement each other well.

Key Differences

Vitamin K

Fat-soluble vitamin essential for blood clotting and bone metabolism. K1 from plants and K2 from bacteria and fermented foods.

Categories:

Common Forms:

• MK-7 (90% bioavailability)
• MK-9 (85% bioavailability)
• MK-4 (75% bioavailability)

Vitamin B9

Water-soluble vitamin (folate) essential for DNA synthesis, cell division, and methylation reactions. Critical during pregnancy.

Categories:

Common Forms:

• Folic acid (95% bioavailability)
• L-Methylfolate (5-MTHF) (85% bioavailability)
• Folinic acid (Leucovorin) (80% bioavailability)

Products Containing Both Vitamin K and Vitamin B9

We found 9 products that combine both supplements:

Multi for Him Tablets

Nature Made

$11.49Score: 86/100

Prenatal Multi + DHA Softgels

Nature Made

$22.99Score: 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

Multi for Her Tablets

Nature Made

$12.49Score: 84/100

Multivitamin Complete Tablets with Iron

Nature Made

$9.99Score: 83/100

ELEMENTS - Multivitamines & Mineraux

Raptor Nutrition

$28Score: 76/100

Multi Vitamin

Daiso

$1.5Score: 48/100

Frequently Asked Questions

What is the difference between Vitamin K and Vitamin B9?

Vitamin K and Vitamin B9 are both important supplements with distinct properties. Vitamin K Fat-soluble vitamin essential for blood clotting and bone metabolism. K1 from plants and K2 from bacteria and fermented foods., while Vitamin B9 Water-soluble vitamin (folate) essential for DNA synthesis, cell division, and methylation reactions. Critical during pregnancy..

Can I take Vitamin K and Vitamin B9 together?

Based on our analysis of 9 products that contain both, yes, Vitamin K and Vitamin B9 can typically be taken together. However, always consult with a healthcare provider before combining supplements.

Which is more popular: Vitamin K or Vitamin B9?

In our database of 564 products, Vitamin K appears in 20 products, while Vitamin B9 appears in 41 products.

Related Comparisons & Products

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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.