21st Century One Daily, Men's Health, 100 Tablets supplement bottle
21st Century

One Daily, Men's Health, 100 Tablets

What We Researched
22 active ingredients analyzed · 13 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
80
Product Score Good
76
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin A (as Acetate & 10% as Beta Carotene) 900 mcg 100%
Vitamin C (as Ascorbic Acid) 99 mg 110%
Vitamin D3 (as Cholecalciferol) (1,000 IU) 25 mcg 125%
Vitamin E (as dl-Alpha Tocopheryl Acetate) 15 mg 100%
Vitamin K (as Phytonadione) 30 mcg 25%
Thiamin (as Thiamin Mononitrate, B-1) 1.32 mg 110%
Riboflavin (Vitamin B-2) 1.43 mg 110%
Niacin (as Niacinamide) 17.6 mg 110%
Vitamin B-6 (as Pyridoxine HCl) 2.17 mg 128%
Folate (240 mcg Folic Acid) 400 mcg DFE 100%
Vitamin B-12 (as Cyanocobalamin) 6.24 mcg 260%
Biotin 43 mcg 143%
Pantothenic Acid (as d-Calcium Pantothenate) 15.5 mg 310%
Calcium (as Calcium Carbonate) 210 mg 16%
Iodine (as Potassium Iodide) 150 mcg 100%
Magnesium (as Magnesium Oxide) 120 mg 29%
Zinc (as Zinc Oxide) 11 mg 100%
Selenium (as Sodium Selenate) 55 mcg 100%
Copper (as Copper Oxide) 0.9 mg 100%
Manganese (as Manganese Sulfate) 2.3 mg 100%
Chromium (as Chromium Chloride) 35 mcg 100%
Lycopene 300 mcg **
Bioavailability Fair

Absorption Rating

  • Vitamin A (as Acetate & 10% as Beta Carotene) Fair
  • Vitamin C (as Ascorbic Acid) Fair
  • Vitamin D3 (as Cholecalciferol) (1,000 IU) Good
  • Vitamin E (as dl-Alpha Tocopheryl Acetate) Poor
  • Vitamin K (as Phytonadione) Fair
  • Thiamin (as Thiamin Mononitrate, B-1) Fair
  • Riboflavin (Vitamin B-2) Good
  • Niacin (as Niacinamide) Good
  • Vitamin B-6 (as Pyridoxine HCl) Fair
  • Folate (240 mcg Folic Acid) Fair
  • Vitamin B-12 (as Cyanocobalamin) Fair
  • Biotin Good
  • Pantothenic Acid (as d-Calcium Pantothenate) Good
  • Calcium (as Calcium Carbonate) Fair
  • Iodine (as Potassium Iodide) Good
  • Magnesium (as Magnesium Oxide) Poor
  • Zinc (as Zinc Oxide) Poor
  • Selenium (as Sodium Selenate) Fair
  • Copper (as Copper Oxide) Fair
  • Manganese (as Manganese Sulfate) Good
  • Chromium (as Chromium Chloride) Poor
  • Lycopene Good
Other Ingredients Very Good

Fillers & Additives

  • Cellulose
  • Starch
  • Stearic Acid
  • Gum Acacia
  • Croscarmellose Sodium
  • Dicalcium Phosphate
  • Gelatin
  • Magnesium Silicate
  • Magnesium Stearate
  • Polyethylene Glycol Low
  • Polysorbate Medium
  • Polyvinyl Alcohol
  • Silicon Dioxide
Efficacy Very Good

Dosage Analysis

  • Vitamin A (as Acetate & 10% as Beta Carotene) 900 mcg Effective
  • Vitamin C (as Ascorbic Acid) 99 mg Effective
  • Vitamin D3 (as Cholecalciferol) (1,000 IU) 25 mcg Effective
  • Vitamin E (as dl-Alpha Tocopheryl Acetate) 15 mg Effective
  • Vitamin K (as Phytonadione) 30 mcg Under-dosed
  • Thiamin (as Thiamin Mononitrate, B-1) 1.32 mg Effective
  • Riboflavin (Vitamin B-2) 1.43 mg Effective
  • Niacin (as Niacinamide) 17.6 mg Effective
  • Vitamin B-6 (as Pyridoxine HCl) 2.17 mg Effective
  • Folate (240 mcg Folic Acid) 400 mcg DFE Effective
  • Vitamin B-12 (as Cyanocobalamin) 6.24 mcg Effective
  • Biotin 43 mcg Effective
  • Pantothenic Acid (as d-Calcium Pantothenate) 15.5 mg Effective
  • Calcium (as Calcium Carbonate) 210 mg Under-dosed
  • Iodine (as Potassium Iodide) 150 mcg Effective
  • Magnesium (as Magnesium Oxide) 120 mg Under-dosed
  • Zinc (as Zinc Oxide) 11 mg Effective
  • Selenium (as Sodium Selenate) 55 mcg Effective
  • Copper (as Copper Oxide) 0.9 mg Effective
  • Manganese (as Manganese Sulfate) 2.3 mg Effective
  • Chromium (as Chromium Chloride) 35 mcg Effective
  • Lycopene 300 mcg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin A (as Acetate & 10% as Beta Carotene) 900 mcg 100%
Vitamin C (as Ascorbic Acid) 99 mg 110%
Vitamin D3 (as Cholecalciferol) (1,000 IU) 25 mcg 125%
Vitamin E (as dl-Alpha Tocopheryl Acetate) 15 mg 100%
Vitamin K (as Phytonadione) 30 mcg 25%
Thiamin (as Thiamin Mononitrate, B-1) 1.32 mg 110%
Riboflavin (Vitamin B-2) 1.43 mg 110%
Niacin (as Niacinamide) 17.6 mg 110%
Vitamin B-6 (as Pyridoxine HCl) 2.17 mg 128%
Folate (240 mcg Folic Acid) 400 mcg DFE 100%
Vitamin B-12 (as Cyanocobalamin) 6.24 mcg 260%
Biotin 43 mcg 143%
Pantothenic Acid (as d-Calcium Pantothenate) 15.5 mg 310%
Calcium (as Calcium Carbonate) 210 mg 16%
Iodine (as Potassium Iodide) 150 mcg 100%
Magnesium (as Magnesium Oxide) 120 mg 29%
Zinc (as Zinc Oxide) 11 mg 100%
Selenium (as Sodium Selenate) 55 mcg 100%
Copper (as Copper Oxide) 0.9 mg 100%
Manganese (as Manganese Sulfate) 2.3 mg 100%
Chromium (as Chromium Chloride) 35 mcg 100%
Lycopene 300 mcg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Starch Generally_safe

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

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Gum Acacia Safe

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

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Dicalcium Phosphate Safe

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

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

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.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Polysorbate Generally_safe

It is used to help mix oil and water-based ingredients.

Polyvinyl Alcohol Generally_safe

It is used as a coating for tablets or capsules.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$9$8$7$6$5 Mar 12 $6.99
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
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Frequently Asked Questions
Is 21st Century One Daily, Men's Health a good supplement?

21st Century One Daily, Men's Health, 100 Tablets received a product quality score of 80/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 22 active ingredients Of the 13 inactive ingredients, 8 are rated safe and 1 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 One Daily, Men's Health?

21st Century One Daily, Men's Health contains 22 active ingredients: Vitamin A (as Acetate & 10% as Beta Carotene) (900 mcg), Vitamin C (as Ascorbic Acid) (99 mg), Vitamin D3 (as Cholecalciferol) (1,000 IU) (25 mcg), Vitamin E (as dl-Alpha Tocopheryl Acetate) (15 mg), Vitamin K (as Phytonadione) (30 mcg), Thiamin (as Thiamin Mononitrate, B-1) (1.32 mg), and 16 more. Notable high-dose ingredients include Vitamin B-12 at 260% DV, Pantothenic Acid at 310% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is 21st Century One Daily, Men's Health safe to take?

21st Century One Daily, Men's Health, 100 Tablets has been analyzed for ingredient safety across all its components. Of 13 inactive ingredients, 8 are rated safe. 1 ingredient is flagged for review: Polyethylene Glycol. '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.

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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.