Natural Factors Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets supplement bottle
Natural Factors

Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 5 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
100
Product Score Excellent
88
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin B12 (methylcobalamin) 1000 mcg †
Bioavailability Excellent

Absorption Rating

  • Vitamin B12 (methylcobalamin) Good
Other Ingredients Excellent

Fillers & Additives

  • Lactose Monohydrate
  • Microcrystalline Cellulose
  • Croscarmellose Sodium
  • Vegetable grade magnesium stearate (lubricant)
Efficacy Excellent

Dosage Analysis

  • Vitamin B12 (methylcobalamin) 1000 mcg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B12 (methylcobalamin) 1000 mcg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Lactose Monohydrate Generally_safe

It is used to add bulk or improve the flow of supplement ingredients.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Vegetable grade magnesium stearate (lubricant) Unknown

Price Comparison

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Natural Factors

Founded 1950 · Coquitlam, British Columbia, Canada · 390 products · naturalfactors.com

Certifications

5 certifications
B Corp Certified Verified Source
Usp Verified Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Usda Organic Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Verified Source

Violation History

5 incidents
Prop 65 Lead2025-10-31Source
Recall Hi Potency B Complex, RevitalX, Super Multi® IRON FREE2024-07-19Source
Lawsuit Products labeled as containing glucosamine sulfate did not contain the ingredient.2021Source
Prop 65 Lead2016-01-13Source
Recall Natural Factors L-Arginine 500mg2006-04-05Source
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Frequently Asked Questions
Is Natural Factors Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets a good supplement?

Natural Factors Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients Of the 4 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, Natural Factors, holds a brand trust score of 88/100 with 5 verified certifications including B Corp Certified, Usp Verified, Fda Gmp Inspections, Non Gmo Project.

What are the ingredients in Natural Factors Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets?

Natural Factors Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets contains 1 active ingredients: Vitamin B12 (methylcobalamin) (1000 mcg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Natural Factors Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets safe to take?

Natural Factors Natural Factors B12 Methylcobalamin 1000 mcg BONUS SIZE, 210 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Natural Factors a trustworthy supplement brand?

Natural Factors receives a brand trust score of 88/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1950 and headquartered in Coquitlam, British Columbia, Canada, the company offers 390 products in their lineup. They hold 5 verified certifications including B Corp Certified, Usp Verified, Fda Gmp Inspections, Non Gmo Project. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Natural Factors has 5 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.