Sundown High Potency B & C Complex supplement bottle
Sundown

High Potency B & C Complex Review

What We Researched
9 active ingredients analyzed · 5 inactive ingredients decoded · 3 brand certifications checked · Last updated: Aug 2026
92
Product Score Excellent
81
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 (as Ascorbic Acid, Rose Hip) 300 mg 500%
Thiamine (as Thiamine Mononitrate, Vitamin B1) 18 mg 1200%
Riboflavin (as Vitamin B2) 10 mg 588%
Niacin (as Niacinamide) 50 mg 250%
Vitamin B6 (as Pyridoxine Hydrochloride) 5 mg 250%
Folic Acid 400 mcg 100%
Vitamin B12 (as Cyanocobalamin) 10 mcg 167%
Biotin 50 mcg 17%
Pantothenic Acid (as D-Calcium Pantothenate) 10 mg 100%
Bioavailability Good

Absorption Rating

  • Vitamin C (as Ascorbic Acid, Rose Hip) Fair
  • Thiamine (as Thiamine Mononitrate, Vitamin B1) Fair
  • Riboflavin (as Vitamin B2) Good
  • Niacin (as Niacinamide) Good
  • Vitamin B6 (as Pyridoxine Hydrochloride) Fair
  • Folic Acid Fair
  • Vitamin B12 (as Cyanocobalamin) Fair
  • Biotin Good
  • Pantothenic Acid (as D-Calcium Pantothenate) Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose
  • Dicalcium Phosphate
  • Vegetable Cellulose
  • Silica
  • Vegetable Magnesium Stearate
Efficacy Excellent

Dosage Analysis

  • Vitamin C (as Ascorbic Acid, Rose Hip) 300 mg Effective
  • Thiamine (as Thiamine Mononitrate, Vitamin B1) 18 mg Effective
  • Riboflavin (as Vitamin B2) 10 mg Effective
  • Niacin (as Niacinamide) 50 mg High
  • Vitamin B6 (as Pyridoxine Hydrochloride) 5 mg Effective
  • Folic Acid 400 mcg Effective
  • Vitamin B12 (as Cyanocobalamin) 10 mcg Effective
  • Biotin 50 mcg Effective
  • Pantothenic Acid (as D-Calcium Pantothenate) 10 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ascorbic Acid, Rose Hip) 300 mg 500%
Thiamine (as Thiamine Mononitrate, Vitamin B1) 18 mg 1200%
Riboflavin (as Vitamin B2) 10 mg 588%
Niacin (as Niacinamide) 50 mg 250%
Vitamin B6 (as Pyridoxine Hydrochloride) 5 mg 250%
Folic Acid 400 mcg 100%
Vitamin B12 (as Cyanocobalamin) 10 mcg 167%
Biotin 50 mcg 17%
Pantothenic Acid (as D-Calcium Pantothenate) 10 mg 100%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Dicalcium Phosphate Safe

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

Vegetable Cellulose Safe

Forms a vegetarian capsule shell alternative to gelatin.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Brand Trust Report
Sundown

Founded 1977 · Bridgewater, NJ, USA · 359 products · sundownnutrition.com/

Certifications

3 certifications
Consumerlab Verified Source
Nsf Gmp Verified Source
Usda Organic Verified Source

Transparency

3 claims
Third Party Testing Claim — Claimed Source
In House Testing — Claimed Source

Violation History

9 incidents
Lawsuit FTC charges of 'review hijacking' on Amazon to mislead consumers.2023Source
Lawsuit Deceptive 'review hijacking' on Amazon to mislead consumers about product ratings and popularity.2023Source
Lawsuit The Bountiful Company, including Sundown Naturals, engaged in 'review hijacking' on Amazon.com to deceive consumers.2023Source
Lawsuit Deceptive labeling of 'Complete' multivitamins that were missing essential B vitamins.2021Source
Lawsuit A class-action lawsuit was filed against Rexall Sundown, Inc., NatureSmart, LLC, and The Bountiful Company for misrepresenting 'Complete' multivitamin gummies that lacked all essential B vitamins.2021Source
Lawsuit Rexall Sundown, Inc. faced a class-action lawsuit for allegedly mislabeling joint health products.2017Source
Recall Rexall Calcium 1200 mg plus 1000IU Vitamin D3, 60 softgels2012-01-16Source
Lawsuit The FTC charged Rexall Sundown, Inc. with making misleading claims about its Cellasene product.2003Source
Lawsuit False and unsubstantiated claims for the 'Cellasene' supplement.2000Source
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Frequently Asked Questions
Is Sundown High Potency B & C Complex a good supplement?

Sundown High Potency B & C Complex 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 9 active ingredients All 5 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Sundown, holds a brand trust score of 81/100 with 3 verified certifications including Consumerlab, Nsf Gmp, Usda Organic.

What are the ingredients in Sundown High Potency B & C Complex?

Sundown High Potency B & C Complex contains 9 active ingredients: Vitamin C (as Ascorbic Acid, Rose Hip) (300 mg), Thiamine (as Thiamine Mononitrate, Vitamin B1) (18 mg), Riboflavin (as Vitamin B2) (10 mg), Niacin (as Niacinamide) (50 mg), Vitamin B6 (as Pyridoxine Hydrochloride) (5 mg), Folic Acid (400 mcg), and 3 more. Notable high-dose ingredients include Vitamin C at 500% DV, Thiamine at 1200% DV, Riboflavin at 588% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Sundown High Potency B & C Complex safe to take?

Sundown High Potency B & C Complex has been analyzed for ingredient safety across all its components. All 5 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Sundown a trustworthy supplement brand?

Sundown receives a brand trust score of 81/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1977 and headquartered in Bridgewater, NJ, USA, the company offers 359 products in their lineup. They hold 3 verified certifications including Consumerlab, Nsf Gmp, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Sundown has 9 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.