21st Century Sentry Senior, Multivitamin & Multimineral Supplement, Adults 50+, 265 Tablets supplement bottle
21st Century

Sentry Senior, Multivitamin & Multimineral Supplement, Adults 50+, 265 Tablets

What We Researched
27 active ingredients analyzed · 17 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
61
Product Score Fair
76
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin A (Acetate, 40% as Beta-Carotene) 750 mcg 83%
Vitamin C (as Ascorbic Acid) 60 mg 67%
Vitamin D3 (as Cholecalciferol) (1,000 IU) 25 mcg 125%
Vitamin E (as dl-Alpha Tocopheryl Acetate) 22.5 mg 150%
Vitamin K (as Phytonadione) 30 mcg 25%
Thiamin (as Thiamin Mononitrate, B1) 1.5 mg 125%
Riboflavin (Vitamin B-2) 1.7 mg 131%
Niacin (as Niacinamide) 20 mg 125%
Vitamin B-6 (as Pyridoxine HCl) 3 mg 176%
Folate (400 mcg Folic Acid) 667 mcg DFE 167%
Vitamin B-12 (as Cyanocobalamin) 25 mcg 1,042%
Biotin 30 mcg 100%
Pantothenic Acid (as d-Calcium Pantothenate) 10 mg 200%
Calcium (as Calcium Carbonate & Dicalcium Phosphate) 220 mg 17%
Phosphorus (as Dicalcium Phosphate) 20 mg 2%
Iodine (as Potassium Iodide) 150 mcg 100%
Magnesium (as Magnesium Oxide) 50 mg 12%
Zinc (as Zinc Oxide) 11 mg 100%
Selenium (as Sodium Selenate) 19 mcg 35%
Copper (as Copper Sulfate) 0.5 mg 56%
Manganese (as Manganese Sulfate) 2.3 mg 100%
Chromium (as Chromium Picolinate) 50 mcg 143%
Molybdenum (as Sodium Molybdate) 45 mcg 100%
Chloride (as Potassium Chloride) 72 mg 3%
Potassium (as Potassium Chloride) 80 mg 2%
Lutein 250 mcg **
Lycopene 300 mcg **
Bioavailability Good

Absorption Rating

  • Vitamin A (Acetate, 40% 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, B1) Fair
  • Riboflavin (Vitamin B-2) Good
  • Niacin (as Niacinamide) Good
  • Vitamin B-6 (as Pyridoxine HCl) Fair
  • Folate (400 mcg Folic Acid) Fair
  • Vitamin B-12 (as Cyanocobalamin) Fair
  • Biotin Good
  • Pantothenic Acid (as d-Calcium Pantothenate) Good
  • Calcium (as Calcium Carbonate & Dicalcium Phosphate) Fair
  • Phosphorus (as Dicalcium Phosphate) Good
  • Iodine (as Potassium Iodide) Good
  • Magnesium (as Magnesium Oxide) Poor
  • Zinc (as Zinc Oxide) Poor
  • Selenium (as Sodium Selenate) Fair
  • Copper (as Copper Sulfate) Fair
  • Manganese (as Manganese Sulfate) Good
  • Chromium (as Chromium Picolinate) Good
  • Molybdenum (as Sodium Molybdate) Good
  • Chloride (as Potassium Chloride) Good
  • Potassium (as Potassium Chloride) Good
  • Lutein Good
  • Lycopene Good
Other Ingredients Poor

Fillers & Additives

  • Cellulose
  • Starch
  • Stearic Acid
  • Gelatin
  • Gum Acacia
  • BHT Medium
  • Citric Acid
  • Croscarmellose Sodium
  • Magnesium Silicate
  • Magnesium Stearate
  • Mono/diglycerides
  • Polyethylene Glycol Low
  • Polyethylene glycol/polyvinyl alcohol copolymer
  • Polysorbate Medium
  • Polyvinyl Alcohol
  • Silicon Dioxide
  • Titanium Dioxide High
Efficacy Good

Dosage Analysis

  • Vitamin A (Acetate, 40% as Beta-Carotene) 750 mcg Effective
  • Vitamin C (as Ascorbic Acid) 60 mg Under-dosed
  • Vitamin D3 (as Cholecalciferol) (1,000 IU) 25 mcg Effective
  • Vitamin E (as dl-Alpha Tocopheryl Acetate) 22.5 mg Effective
  • Vitamin K (as Phytonadione) 30 mcg Under-dosed
  • Thiamin (as Thiamin Mononitrate, B1) 1.5 mg Effective
  • Riboflavin (Vitamin B-2) 1.7 mg Effective
  • Niacin (as Niacinamide) 20 mg Effective
  • Vitamin B-6 (as Pyridoxine HCl) 3 mg Effective
  • Folate (400 mcg Folic Acid) 667 mcg DFE Effective
  • Vitamin B-12 (as Cyanocobalamin) 25 mcg Effective
  • Biotin 30 mcg Effective
  • Pantothenic Acid (as d-Calcium Pantothenate) 10 mg Effective
  • Calcium (as Calcium Carbonate & Dicalcium Phosphate) 220 mg Under-dosed
  • Phosphorus (as Dicalcium Phosphate) 20 mg Under-dosed
  • Iodine (as Potassium Iodide) 150 mcg Effective
  • Magnesium (as Magnesium Oxide) 50 mg Under-dosed
  • Zinc (as Zinc Oxide) 11 mg Effective
  • Selenium (as Sodium Selenate) 19 mcg Under-dosed
  • Copper (as Copper Sulfate) 0.5 mg Effective
  • Manganese (as Manganese Sulfate) 2.3 mg Effective
  • Chromium (as Chromium Picolinate) 50 mcg Effective
  • Molybdenum (as Sodium Molybdate) 45 mcg Effective
  • Chloride (as Potassium Chloride) 72 mg Under-dosed
  • Potassium (as Potassium Chloride) 80 mg Under-dosed
  • Lutein 250 mcg Under-dosed
  • Lycopene 300 mcg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin A (Acetate, 40% as Beta-Carotene) 750 mcg 83%
Vitamin C (as Ascorbic Acid) 60 mg 67%
Vitamin D3 (as Cholecalciferol) (1,000 IU) 25 mcg 125%
Vitamin E (as dl-Alpha Tocopheryl Acetate) 22.5 mg 150%
Vitamin K (as Phytonadione) 30 mcg 25%
Thiamin (as Thiamin Mononitrate, B1) 1.5 mg 125%
Riboflavin (Vitamin B-2) 1.7 mg 131%
Niacin (as Niacinamide) 20 mg 125%
Vitamin B-6 (as Pyridoxine HCl) 3 mg 176%
Folate (400 mcg Folic Acid) 667 mcg DFE 167%
Vitamin B-12 (as Cyanocobalamin) 25 mcg 1,042%
Biotin 30 mcg 100%
Pantothenic Acid (as d-Calcium Pantothenate) 10 mg 200%
Calcium (as Calcium Carbonate & Dicalcium Phosphate) 220 mg 17%
Phosphorus (as Dicalcium Phosphate) 20 mg 2%
Iodine (as Potassium Iodide) 150 mcg 100%
Magnesium (as Magnesium Oxide) 50 mg 12%
Zinc (as Zinc Oxide) 11 mg 100%
Selenium (as Sodium Selenate) 19 mcg 35%
Copper (as Copper Sulfate) 0.5 mg 56%
Manganese (as Manganese Sulfate) 2.3 mg 100%
Chromium (as Chromium Picolinate) 50 mcg 143%
Molybdenum (as Sodium Molybdate) 45 mcg 100%
Chloride (as Potassium Chloride) 72 mg 3%
Potassium (as Potassium Chloride) 80 mg 2%
Lutein 250 mcg **
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.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Gum Acacia Safe

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

BHT Caution

Prevents oxidation and rancidity in oil-containing supplements.

Citric Acid Safe

Adds tartness and acts as a natural preservative. Also aids in ingredient stability.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

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.

Mono/diglycerides Unknown
Polyethylene Glycol Caution

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

Polyethylene glycol/polyvinyl alcohol copolymer Unknown
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.

Titanium Dioxide Caution

Used as a whitening agent in tablet coatings and capsules.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$17$16$15$14$13 Mar 12 $15.00
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 Sentry Senior, Multivitamin & Multimineral Supplement a good supplement?

21st Century Sentry Senior, Multivitamin & Multimineral Supplement, Adults 50+, 265 Tablets received a product quality score of 61/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 27 active ingredients Of the 17 inactive ingredients, 8 are rated safe and 3 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 Sentry Senior, Multivitamin & Multimineral Supplement?

21st Century Sentry Senior, Multivitamin & Multimineral Supplement contains 27 active ingredients: Vitamin A (Acetate, 40% as Beta-Carotene) (750 mcg), Vitamin C (as Ascorbic Acid) (60 mg), Vitamin D3 (as Cholecalciferol) (1,000 IU) (25 mcg), Vitamin E (as dl-Alpha Tocopheryl Acetate) (22.5 mg), Vitamin K (as Phytonadione) (30 mcg), Thiamin (as Thiamin Mononitrate, B1) (1.5 mg), and 21 more. Notable high-dose ingredients include Vitamin B-12 at 1,042% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is 21st Century Sentry Senior, Multivitamin & Multimineral Supplement safe to take?

21st Century Sentry Senior, Multivitamin & Multimineral Supplement, Adults 50+, 265 Tablets has been analyzed for ingredient safety across all its components. Of 17 inactive ingredients, 8 are rated safe. 3 ingredients are flagged for review: BHT, Polyethylene Glycol, 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.

How much vitamin d3 should i take daily?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What does vitamin d do?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How much vitamin d3 per day for a woman?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

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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.