21st Century Antioxidant, 75 Tablets supplement bottle
21st Century

Antioxidant, 75 Tablets

What We Researched
8 active ingredients analyzed · 13 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
45
Product Score Poor
76
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin A (100% as Beta Carotene) 1,500 mg 167%
Vitamin C (as Ascorbic Acid) 250 mg 278%
Vitamin E (as dl-alpha Tocopheryl Acetate) 90 mg 600%
Calcium (as Dicalcium Phosphate) 100 mg 8%
Zinc (as Zinc Oxide) 7.5 mg 68%
Selenium (as Sodium Selenate) 15 mcg 27%
Copper (as Cupric Oxide) 1 mg 111%
Manganese (as Manganese Sulfate) 1.5 mg 65%
Bioavailability Poor

Absorption Rating

  • Vitamin A (100% as Beta Carotene) Fair
  • Vitamin C (as Ascorbic Acid) Fair
  • Vitamin E (as dl-alpha Tocopheryl Acetate) Poor
  • Calcium (as Dicalcium Phosphate) Fair
  • Zinc (as Zinc Oxide) Poor
  • Selenium (as Sodium Selenate) Fair
  • Copper (as Cupric Oxide) Poor
  • Manganese (as Manganese Sulfate) Good
Other Ingredients Very Poor

Fillers & Additives

  • Gelatin
  • Cellulose
  • Croscarmellose Sodium
  • Glucose
  • Maltodextrin
  • Artificial colors (fd&c blue #2 carmine, fd&c red #40) High
  • Magnesium Silicate
  • Magnesium Stearate
  • PEG Medium
  • Silicon Dioxide
  • Starch
  • Stearic Acid
  • Titanium Dioxide High
Efficacy Fair

Dosage Analysis

  • Vitamin A (100% as Beta Carotene) 1,500 mg High
  • Vitamin C (as Ascorbic Acid) 250 mg Effective
  • Vitamin E (as dl-alpha Tocopheryl Acetate) 90 mg Effective
  • Calcium (as Dicalcium Phosphate) 100 mg Under-dosed
  • Zinc (as Zinc Oxide) 7.5 mg Under-dosed
  • Selenium (as Sodium Selenate) 15 mcg Under-dosed
  • Copper (as Cupric Oxide) 1 mg Effective
  • Manganese (as Manganese Sulfate) 1.5 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin A (100% as Beta Carotene) 1,500 mg 167%
Vitamin C (as Ascorbic Acid) 250 mg 278%
Vitamin E (as dl-alpha Tocopheryl Acetate) 90 mg 600%
Calcium (as Dicalcium Phosphate) 100 mg 8%
Zinc (as Zinc Oxide) 7.5 mg 68%
Selenium (as Sodium Selenate) 15 mcg 27%
Copper (as Cupric Oxide) 1 mg 111%
Manganese (as Manganese Sulfate) 1.5 mg 65%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Glucose Generally_safe

It is used as a filler, sweetener, or to improve the flow of powders.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Artificial colors (fd&c blue #2 carmine, fd&c red #40) Unknown
Magnesium Silicate Generally_safe

It is used to improve powder flow and prevent clumping.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

PEG Caution

It is used as a binder, coating, or emulsifier.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Starch Generally_safe

It is used as a filler, binder, or thickener.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Titanium Dioxide Caution

Used as a whitening agent in tablet coatings and capsules.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$10$9$8$7$6 Mar 12 $8.49
iHerb

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

Brand Trust Report
21st Century

Founded 1991 · Tempe, Arizona, United States · 231 products · 21stcenturyvitamins.com/

Certifications

2 certifications
Consumerlab Verified
Nsf Gmp Verified Source

Transparency

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

Violation History

4 incidents
Prop 65 Lead2021-06-22Source
Recall Vitamin D3 5000 IU Tablets2021-05-19Source
Lawsuit False advertising of Glucosamine/Chondroitin supplements.2012Source
Prop 65 Lead2008-12-23Source
Related Supplements
Frequently Asked Questions
Is 21st Century Antioxidant, 75 Tablets a good supplement?

21st Century Antioxidant, 75 Tablets received a product quality score of 45/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 8 active ingredients Of the 13 inactive ingredients, 6 are rated safe and 2 are flagged for review. The manufacturer, 21st Century, holds a brand trust score of 76/100 with 2 verified certifications including Consumerlab, Nsf Gmp.

What are the ingredients in 21st Century Antioxidant, 75 Tablets?

21st Century Antioxidant, 75 Tablets contains 8 active ingredients: Vitamin A (100% as Beta Carotene) (1,500 mg), Vitamin C (as Ascorbic Acid) (250 mg), Vitamin E (as dl-alpha Tocopheryl Acetate) (90 mg), Calcium (as Dicalcium Phosphate) (100 mg), Zinc (as Zinc Oxide) (7.5 mg), Selenium (as Sodium Selenate) (15 mcg), and 2 more. Notable high-dose ingredients include Vitamin C at 278% DV, Vitamin E at 600% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is 21st Century Antioxidant, 75 Tablets safe to take?

21st Century Antioxidant, 75 Tablets has been analyzed for ingredient safety across all its components. Of 13 inactive ingredients, 6 are rated safe. 2 ingredients are flagged for review: PEG, Titanium Dioxide. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is 21st Century a trustworthy supplement brand?

21st Century receives a brand trust score of 76/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1991 and headquartered in Tempe, Arizona, United States, the company offers 231 products in their lineup. They hold 2 verified certifications including Consumerlab, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: 21st Century has 4 historical regulatory incidents on record, which are factored into the trust score.

Scan Any Supplement Instantly

Download GoodSupp to scan barcodes, check ingredient safety, and find the best supplements for your needs.

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.