Vitamin B1 vs Vitamin B9

TL;DR

Quick comparison: Vitamin B1 and Vitamin B9 have 0 overlapping categories and appear together in 27 products.

•Choose Vitamin B1 if: Water-soluble vitamin (thiamine) essential for energy metabolism, nerve function...
•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 B1	Vitamin B9
Type	vitamin	vitamin
Common Dosage	1.1-1.2 mg daily	400 mcg DFE daily
Best Bioavailability	Thiamine HCl (95%)	Folic acid (95%)
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 B9

Typevitamin

Common Dosage400 mcg DFE daily

Best BioavailabilityFolic acid (95%)

Categories0

Available Products0

Can You Take Both?

Yes, Vitamin B1 and Vitamin B9 can typically be taken together. In fact, we found 27 products in our database that contain both supplements, suggesting they complement each other well.

Key Differences

Vitamin B1

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

Categories:

Common Forms:

• Thiamine HCl (95% bioavailability)
• Thiamine mononitrate (90% bioavailability)
• Benfotiamine (50% 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 B1 and Vitamin B9

We found 12 products that combine both supplements:

Happy - Bonne Humeur

Raptor Nutrition

$24Score: 86/100

Multi for Him 50+ Tablets

Nature Made

$12.99Score: 86/100

Multi for Him Tablets

Nature Made

$11.49Score: 86/100

Prenatal Multi + DHA Softgels

Nature Made

$22.99Score: 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

Limitless Fuel

Raptor Nutrition

$44Score: 83/100

Super B-Complex with Electrolytes

Kirkland Signature

$15.99Score: 82/100

Adult 50+ Mature Multi Vitamins & Minerals

Kirkland Signature

$12.99Score: 82/100

Super B Complex with Vitamin C Tablets

Nature Made

$10.49Score: 81/100

Frequently Asked Questions

What is the difference between Vitamin B1 and Vitamin B9?

Vitamin B1 and Vitamin B9 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 B9 Water-soluble vitamin (folate) essential for DNA synthesis, cell division, and methylation reactions. Critical during pregnancy..

Can I take Vitamin B1 and Vitamin B9 together?

Based on our analysis of 27 products that contain both, yes, Vitamin B1 and Vitamin B9 can typically be taken together. However, always consult with a healthcare provider before combining supplements.

Which is more popular: Vitamin B1 or Vitamin B9?

In our database of 564 products, Vitamin B1 appears in 44 products, while Vitamin B9 appears in 41 products.

Related Comparisons & Products

What is Vitamin B1?What is Vitamin B9?Vitamin E vs Vitamin B9 Inositol vs Vitamin B9 Manganese vs Vitamin B9 Multi for Him Tablets (contains both)Happy - Bonne Humeur (contains both)Multi for Him 50+ 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.