Kirkland Signature Super B-Complex with Electrolytes supplement bottle
Kirkland Signature

Super B-Complex with Electrolytes Review

What We Researched
11 active ingredients analyzed · 6 inactive ingredients decoded · 4 brand certifications checked · Last updated: Aug 2026
92
Product Score Excellent
80
Brand Score Good

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Biotin 300 mcg
Folic Acid 400 mcg
Vitamin B12 100 mcg
Pantothenic Acid 5 mg
Vitamin C 200 mg
Thiamine 100 mg
Potassium 30 mg
Niacin 25 mg
Vitamin B6 3 mg
Riboflavin 20 mg
Bioavailability Very Good

Absorption Rating

  • Biotin Good
  • Folic Acid Fair
  • Vitamin B12 Fair
  • Pantothenic Acid Good
  • Vitamin C Fair
  • Thiamine Good
  • Potassium Good
  • Niacin Good
  • Vitamin B6 Fair
  • Riboflavin Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Croscarmellose Sodium
  • Magnesium Stearate
  • Carnauba Wax
  • Mannitol
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • Biotin 300 mcg Effective
  • Folic Acid 400 mcg Effective
  • Vitamin B12 100 mcg Effective
  • Pantothenic Acid 5 mg Effective
  • Vitamin C 200 mg Effective
  • Thiamine 100 mg Effective
  • Potassium 30 mg Under-dosed
  • Niacin 25 mg Effective
  • Vitamin B6 3 mg Effective
  • Riboflavin 20 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Biotin 300 mcg
Folic Acid 400 mcg
Vitamin B12 100 mcg
Pantothenic Acid 5 mg
Vitamin C 200 mg
Thiamine 100 mg
Potassium 30 mg
Niacin 25 mg
Vitamin B6 3 mg
Sodium 90 mg
Riboflavin 20 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

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.

Carnauba Wax Safe

Provides a glossy, protective coating on tablets.

Mannitol Generally_safe

It is used as a sweetener, filler, and flow agent.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
Kirkland Signature

Founded 1995 · Issaquah, Washington, United States · 56 products · costco.com/kirkland-signature.html

Certifications

4 certifications
Usp Verified Verified Source
Informed Choice Verified
USDA Organic Verified
Gluten-Free Certified Verified

Transparency

5 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Claimed
Contains Proprietary Blend — True

Violation History

3 incidents
Lawsuit Falsely advertising rotisserie chicken as containing 'no preservatives'2026Source
Recall Kirkland Signature B100 Complex Timed Release2025-03-31Source
Recall Kirkland Signature Severe Cold and Flu Plus Congestion2024-11-30Source
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Frequently Asked Questions
Is Kirkland Signature Super B-Complex with Electrolytes a good supplement?

Kirkland Signature Super B-Complex with Electrolytes received a product quality score of 92/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 11 active ingredients with 500 servings per container. Of the 6 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Kirkland Signature, holds a brand trust score of 80/100 with 4 verified certifications including Usp Verified, Informed Choice, USDA Organic, Gluten-Free Certified.

What are the ingredients in Kirkland Signature Super B-Complex with Electrolytes?

Kirkland Signature Super B-Complex with Electrolytes contains 11 active ingredients: Biotin (300 mcg), Folic Acid (400 mcg), Vitamin B12 (100 mcg), Pantothenic Acid (5 mg), Vitamin C (200 mg), Thiamine (100 mg), and 5 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Kirkland Signature Super B-Complex with Electrolytes safe to take?

Kirkland Signature Super B-Complex with Electrolytes 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 Kirkland Signature a trustworthy supplement brand?

Kirkland Signature receives a brand trust score of 80/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1995 and headquartered in Issaquah, Washington, United States, the company offers 56 products in their lineup. They hold 4 verified certifications including Usp Verified, Informed Choice, USDA Organic, Gluten-Free Certified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Kirkland Signature has 3 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 — read our methodology. 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.