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

Super B-Complex With Electrolytes Review

What We Researched
11 active ingredients analyzed · 19 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
Vitamin C 200 mg 333%
Thiamine (as Vitamin B1) 100 mg 6667%
Riboflavin (as Vitamin B2) 20 mg 1176%
Niacin 25 mg 125%
Vitamin B6 3 mg 150%
Folic Acid 400 mcg 100%
Vitamin B12 100 mcg 1667%
Biotin 300 mcg 100%
Pantothenic Acid 5.5 mg 55%
Potassium 30 mg 1%
Bioavailability Very Good

Absorption Rating

  • Vitamin C Fair
  • Thiamine (as Vitamin B1) Good
  • Riboflavin (as Vitamin B2) Good
  • Niacin Good
  • Vitamin B6 Fair
  • Folic Acid Fair
  • Vitamin B12 Fair
  • Biotin Good
  • Pantothenic Acid Good
  • Potassium Good
Other Ingredients Excellent

Fillers & Additives

  • Sodium Chloride
  • Dicalcium Phosphate
  • Ascorbic Acid
  • Cellulose
  • Thiamine Mononitrate
  • Potassium Chloride
  • Croscarmellose Sodium
  • Niacinamide
  • Silicon Dioxide
  • Riboflavin
  • Mannitol
  • Magnesium Stearate
  • Cellulose Coating
  • Calcium D-Pantothenate
  • Pyridoxine Hydrochloride
  • Folic Acid
  • D-Biotin
  • Cyanocobalamin
  • Carnauba Wax
Efficacy Excellent

Dosage Analysis

  • Vitamin C 200 mg Effective
  • Thiamine (as Vitamin B1) 100 mg Effective
  • Riboflavin (as Vitamin B2) 20 mg Effective
  • Niacin 25 mg Effective
  • Vitamin B6 3 mg Effective
  • Folic Acid 400 mcg Effective
  • Vitamin B12 100 mcg Effective
  • Biotin 300 mcg Effective
  • Pantothenic Acid 5.5 mg Effective
  • Potassium 30 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C 200 mg 333%
Thiamine (as Vitamin B1) 100 mg 6667%
Riboflavin (as Vitamin B2) 20 mg 1176%
Niacin 25 mg 125%
Vitamin B6 3 mg 150%
Folic Acid 400 mcg 100%
Vitamin B12 100 mcg 1667%
Biotin 300 mcg 100%
Pantothenic Acid 5.5 mg 55%
Sodium 90 mg 4%
Potassium 30 mg 1%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Sodium Chloride Safe

Provides sodium, stabilizes formulations.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Ascorbic Acid Safe

Prevents oxidation and provides vitamin C.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Thiamine Mononitrate Safe

It is used as a source of vitamin B1.

Potassium Chloride Safe

It is used to provide potassium, an essential mineral.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Niacinamide Safe

It is included for its potential health benefits.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Riboflavin Safe

It is used as a source of vitamin B2.

Mannitol Generally_safe

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

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Cellulose Coating Generally_safe

It is used to coat tablets or capsules for easier swallowing or to control release.

Calcium D-Pantothenate Unknown
Pyridoxine Hydrochloride Safe

It is used as a source of vitamin B6.

Folic Acid Safe

It is used as a source of folate.

D-Biotin Unknown
Cyanocobalamin Safe

It is used as a source of vitamin B12.

Carnauba Wax Safe

Provides a glossy, protective coating on tablets.

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 Of the 19 inactive ingredients, 15 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: Vitamin C (200 mg), Thiamine (as Vitamin B1) (100 mg), Riboflavin (as Vitamin B2) (20 mg), Niacin (25 mg), Vitamin B6 (3 mg), Folic Acid (400 mcg), and 5 more. Notable high-dose ingredients include Vitamin C at 333% DV, Thiamine at 6667% DV, Riboflavin at 1176% DV. 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.