Comparison

Vitamin B1 vs Vitamin K

TL;DR

Quick comparison: Vitamin B1 and Vitamin K have 0 overlapping categories and appear together in 13 products.

Choose Vitamin B1 if: Water-soluble vitamin (thiamine) essential for energy metabolism, nerve function...
Choose Vitamin K if: Fat-soluble vitamin essential for blood clotting and bone metabolism. K1 from pl...
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	Vitamin B1	Vitamin K
Type	vitamin	vitamin
Common Dosage	1.1-1.2 mg daily	90-120 mcg daily
Best Bioavailability	Thiamine HCl (95%)	MK-7 (90%)
Categories	0	0
Available Products	0	0

Vitamin B1

Typevitamin

Common Dosage1.1-1.2 mg daily

Best BioavailabilityThiamine HCl (95%)

Categories0

Available Products0

Vitamin K

Typevitamin

Common Dosage90-120 mcg daily

Best BioavailabilityMK-7 (90%)

Categories0

Available Products0

Can you take both?

Yes, Vitamin B1 and Vitamin K can typically be taken together. In fact, we found 13 products in our database that contain both supplements, suggesting they complement each other well.

Key differences

Option A

Vitamin B1

Water-soluble vitamin (thiamine) essential for energy metabolism, nerve function, and carbohydrate processing. Required for production of ATP in cellular mitochondria.

Common forms

Thiamine HCl · 95% bioavailability
Thiamine mononitrate · 90% bioavailability
Benfotiamine · 50% bioavailability

Option B

Vitamin K

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

Common forms

MK-7 · 90% bioavailability
MK-9 · 85% bioavailability
MK-4 · 75% bioavailability

Products with both Vitamin B1 and Vitamin K

We found 12 products that combine both supplements:

Transparent Labs Multivitamin

87·Transparent Labs

Prenatal Multi + DHA Softgels

86·Nature Made

Essential Multivitamin

86·Momentous

Multi for Her 50+ Tablets

86·Nature Made

Multi for Him Tablets

86·Nature Made

Multi for Him 50+ Tablets

86·Nature Made

Daily Multi Vitamins & Minerals

85·Kirkland Signature

Elite Multivitamin

85·Gorilla Mind

Multi for Her Tablets

84·Nature Made

Multivitamin Complete Tablets with Iron

83·Nature Made

ELEMENTS - Multivitamines & Mineraux

76·Raptor Nutrition

Daily Multivitamin for Women

54·Bloom Nutrition

Frequently asked

What is the difference between Vitamin B1 and Vitamin K?

Vitamin B1 and Vitamin K are both important supplements with distinct properties. Vitamin B1 Water-soluble vitamin (thiamine) essential for energy metabolism, nerve function, and carbohydrate processing. Required for production of ATP in cellular mitochondria., while Vitamin K Fat-soluble vitamin essential for blood clotting and bone metabolism. K1 from plants and K2 from bacteria and fermented foods..

Can I take Vitamin B1 and Vitamin K together?

Based on our analysis of 13 products that contain both, yes, Vitamin B1 and Vitamin K can typically be taken together. However, always consult with a healthcare provider before combining supplements.

Which is more popular: Vitamin B1 or Vitamin K?

In our database of 565 products, Vitamin B1 appears in 44 products, while Vitamin K appears in 20 products.

Related comparisons & products

What is Vitamin B1?What is Vitamin K?Selenium vs Vitamin K Vitamin K vs Magnesium Vitamin K vs Vitamin D Transparent 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.