Stress B with Zinc, 66 Tablets
Product Analysis
Transparency Excellent
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Vitamin C (as Ascorbic Acid) | 500 mg | 556% |
| Vitamin E (as dl-Alpha Tocopheryl Acetate) | 13.5 mg | 90% |
| Thiamin (as Thiamin Mononitrate B-1) | 10 mg | 833% |
| Riboflavin (Vitamin B-2) | 10 mg | 769% |
| Niacin (as Niacinamide) | 100 mg | 625% |
| Vitamin B-6 (as Pyridoxine HCl) | 5 mg | 294% |
| Folate (400 mcg Folic Acid) | 667 mcg DFE | 167% |
| Vitamin B-12 (as Cyanocobalamin) | 12 mcg | 500% |
| Biotin | 45 mcg | 150% |
| Pantothenic Acid (as d-Calcium Pantothenate) | 20 mg | 400% |
| Calcium (as Calcium Carbonate) | 70 mg | 5% |
| Zinc (as Zinc Oxide) | 23.9 mg | 217% |
| Copper (as Cupric Sulfate) | 3 mg | 333% |
Bioavailability Fair
Absorption Rating
- Vitamin C (as Ascorbic Acid) Fair
- Vitamin E (as dl-Alpha Tocopheryl Acetate) Poor
- Thiamin (as Thiamin Mononitrate B-1) 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) Fair
- Zinc (as Zinc Oxide) Poor
- Copper (as Cupric Sulfate) Fair
Other Ingredients Good
Fillers & Additives
- Starch
- Cellulose
- Hydroxypropyl Methylcellulose
- Croscarmellose Sodium
- Dextrin
- Dextrose
- Gelatin
- Magnesium Stearate
- Polyethylene Glycol Low
- Silicon Dioxide
- Stearic Acid
- Titanium Dioxide High
Efficacy Very Good
Dosage Analysis
- Vitamin C (as Ascorbic Acid) 500 mg Effective
- Vitamin E (as dl-Alpha Tocopheryl Acetate) 13.5 mg Under-dosed
- Thiamin (as Thiamin Mononitrate B-1) 10 mg Effective
- Riboflavin (Vitamin B-2) 10 mg Effective
- Niacin (as Niacinamide) 100 mg High
- Vitamin B-6 (as Pyridoxine HCl) 5 mg Effective
- Folate (400 mcg Folic Acid) 667 mcg DFE Effective
- Vitamin B-12 (as Cyanocobalamin) 12 mcg Effective
- Biotin 45 mcg Effective
- Pantothenic Acid (as d-Calcium Pantothenate) 20 mg Effective
- Calcium (as Calcium Carbonate) 70 mg Under-dosed
- Zinc (as Zinc Oxide) 23.9 mg Effective
- Copper (as Cupric Sulfate) 3 mg High
Supplement Facts
| Ingredient | Amount | % Daily Value |
|---|---|---|
| Vitamin C (as Ascorbic Acid) | 500 mg | 556% |
| Vitamin E (as dl-Alpha Tocopheryl Acetate) | 13.5 mg | 90% |
| Thiamin (as Thiamin Mononitrate B-1) | 10 mg | 833% |
| Riboflavin (Vitamin B-2) | 10 mg | 769% |
| Niacin (as Niacinamide) | 100 mg | 625% |
| Vitamin B-6 (as Pyridoxine HCl) | 5 mg | 294% |
| Folate (400 mcg Folic Acid) | 667 mcg DFE | 167% |
| Vitamin B-12 (as Cyanocobalamin) | 12 mcg | 500% |
| Biotin | 45 mcg | 150% |
| Pantothenic Acid (as d-Calcium Pantothenate) | 20 mg | 400% |
| Calcium (as Calcium Carbonate) | 70 mg | 5% |
| Zinc (as Zinc Oxide) | 23.9 mg | 217% |
| Copper (as Cupric Sulfate) | 3 mg | 333% |
Other Ingredients
Starch Generally_safe
Cellulose Safe
Dextrin Generally_safe
Dextrose Generally_safe
Gelatin Safe
Magnesium Stearate Safe
Polyethylene Glycol Caution
Silicon Dioxide Safe
Stearic Acid Safe
Titanium Dioxide Caution
Price Comparison
Price History
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Is 21st Century Stress B with Zinc, 66 Tablets a good supplement?
21st Century Stress B with Zinc, 66 Tablets received a product quality score of 70/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 13 active ingredients Of the 12 inactive ingredients, 7 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 Stress B with Zinc, 66 Tablets?
21st Century Stress B with Zinc, 66 Tablets contains 13 active ingredients: Vitamin C (as Ascorbic Acid) (500 mg), Vitamin E (as dl-Alpha Tocopheryl Acetate) (13.5 mg), Thiamin (as Thiamin Mononitrate B-1) (10 mg), Riboflavin (Vitamin B-2) (10 mg), Niacin (as Niacinamide) (100 mg), Vitamin B-6 (as Pyridoxine HCl) (5 mg), and 7 more. Notable high-dose ingredients include Vitamin C at 556% DV, Thiamin at 833% DV, Riboflavin at 769% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.
Is 21st Century Stress B with Zinc, 66 Tablets safe to take?
21st Century Stress B with Zinc, 66 Tablets has been analyzed for ingredient safety across all its components. Of 12 inactive ingredients, 7 are rated safe. 2 ingredients are flagged for review: 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.
What is magnesium good for?
Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.
How much magnesium per day?
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 is zinc good for?
Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.
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