Natural Factors Stress B Formula supplement bottle
Natural Factors

Stress B Formula

What We Researched
12 active ingredients analyzed · 4 inactive ingredients decoded · 5 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
83
Product Score Good
88
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ascorbic Acid) 1000 mg 1111%
Thiamine (as Thiamine Hydrochloride) 25 mg 2083%
Riboflavin (as Vitamin B2) 25 mg 1923%
Niacin (as Niacinamide) 25 mg 156%
Vitamin B6 (as Pyridoxine Hydrochloride) 25 mg 1471%
Folate 1700 mcg DFE 425%
Vitamin B12 (as Cyanocobalamin) 25 mcg 1042%
Biotin (as Vitamin B7) 25 mcg 83%
Pantothenic Acid (as Calcium Pantothenate) 25 mg 500%
Choline (as Choline Bitartrate) 25 mg 5%
Inositol 25 mg
Para-Aminobenzoic Acid 25 mg
Bioavailability Good

Absorption Rating

  • Vitamin C (as Ascorbic Acid) Fair
  • Thiamine (as Thiamine Hydrochloride) Fair
  • Riboflavin (as Vitamin B2) Good
  • Niacin (as Niacinamide) Good
  • Vitamin B6 (as Pyridoxine Hydrochloride) Fair
  • Folate Fair
  • Vitamin B12 (as Cyanocobalamin) Fair
  • Biotin (as Vitamin B7) Good
  • Pantothenic Acid (as Calcium Pantothenate) Good
  • Choline (as Choline Bitartrate) Poor
  • Inositol Good
  • Para-Aminobenzoic Acid Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Coating
  • Croscarmellose Sodium
  • Magnesium Stearate
Efficacy Good

Dosage Analysis

  • Vitamin C (as Ascorbic Acid) 1000 mg Effective
  • Thiamine (as Thiamine Hydrochloride) 25 mg Effective
  • Riboflavin (as Vitamin B2) 25 mg Effective
  • Niacin (as Niacinamide) 25 mg Effective
  • Vitamin B6 (as Pyridoxine Hydrochloride) 25 mg Effective
  • Folate 1700 mcg DFE High
  • Vitamin B12 (as Cyanocobalamin) 25 mcg Effective
  • Biotin (as Vitamin B7) 25 mcg Under-dosed
  • Pantothenic Acid (as Calcium Pantothenate) 25 mg Effective
  • Choline (as Choline Bitartrate) 25 mg Under-dosed
  • Inositol 25 mg Under-dosed
  • Para-Aminobenzoic Acid 25 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ascorbic Acid) 1000 mg 1111%
Thiamine (as Thiamine Hydrochloride) 25 mg 2083%
Riboflavin (as Vitamin B2) 25 mg 1923%
Niacin (as Niacinamide) 25 mg 156%
Vitamin B6 (as Pyridoxine Hydrochloride) 25 mg 1471%
Folate 1700 mcg DFE 425%
Vitamin B12 (as Cyanocobalamin) 25 mcg 1042%
Biotin (as Vitamin B7) 25 mcg 83%
Pantothenic Acid (as Calcium Pantothenate) 25 mg 500%
Choline (as Choline Bitartrate) 25 mg 5%
Inositol 25 mg
Para-Aminobenzoic Acid 25 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

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

Coating Unknown
Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

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
Related Supplements
Frequently Asked Questions
Is Natural Factors Stress B Formula a good supplement?

Natural Factors Stress B Formula received a product quality score of 83/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 12 active ingredients Of the 4 inactive ingredients, 3 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 Stress B Formula?

Natural Factors Stress B Formula contains 12 active ingredients: Vitamin C (as Ascorbic Acid) (1000 mg), Thiamine (as Thiamine Hydrochloride) (25 mg), Riboflavin (as Vitamin B2) (25 mg), Niacin (as Niacinamide) (25 mg), Vitamin B6 (as Pyridoxine Hydrochloride) (25 mg), Folate (1700 mcg DFE), and 6 more. Notable high-dose ingredients include Vitamin C at 1111% DV, Thiamine at 2083% DV, Riboflavin at 1923% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Natural Factors Stress B Formula safe to take?

Natural Factors Stress B Formula 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.