Zinc 50 mg by 21st Century — Ingredients, Evidence & Safety

Product Label

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Safety Alerts

⚠️ Zinc: 50mg is 1.2× the Tolerable Upper Intake Level (40mg)

Label Data

1 Tablet(s) Serving Size

Mineral Product Type

50% Evidence Coverage

Supplement Facts — Evidence Check

Calcium

125 mg (10% DV)

Zinc

50 mg (450% DV)

⚠️ Exceeds Tolerable Upper Intake Level by 1.2× (UL: 40 mg) 📚 258 studies (Tier A: 6, B: 134)

RDA 11mg This product: 50mg UL 40mg

Other Ingredients

Cellulose Stearic Acid Contains Less Than 2% of

Label Claims — Verification

❓ Nutrient

❓ All Other

❓ Structure/Function

All Other (99% of products) Structure/Function (84% of products) Nutrient (48% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: As a mineral supplement, adults take one (1) tablet daily with any meal or as directed by a healthcare provider. Do not exceed recommended dosage.

⚠️ Warnings & Precautions

Do not exceed recommended dosage.

Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.

Stop use and contact a physician if adverse reactions occur.

Keep out of reach of children.

Do not use if product appears to be tampered with or seal is broken.

🧪 Formulation Notes

No added Sugar, Yeast, Preservatives or Artificial Flavors.

Gluten free

Zinc 50 mg is an important antioxidant mineral that supports the immune system.

Additional Information

Individual results may vary.

Store at room temperature.

Chelated Antioxidant Support

Gluten free

Guaranteed quality Laboratory tested

Product Details

UPC / SKU 7 40985 21393 3

DSLD Entry Date 2019-08-23

Product Type Mineral

Form Tablet or Pill

Brand 21st Century

DSLD ID 205628

Data Updated 2026-04-11

Research Evidence

397 Research Sources

55 Avg Quality Score

200 Meta Analysis

68 Rct

58 Systematic Review

53 Clinical Trial

9 Cochrane Review

2 Narrative Review

2 Regulatory Source

1 Observational

1 Other

1 Openfda Safety

A Zinc supplementation for improving pregnancy and infant outcome

Meta Analysis The Cochrane database of systematic reviews 2021

PubMed DOI Cochrane

A Zinc supplementation for preventing mortality, morbidity, and growth failure in children aged 6 months to 12 years

Narrative Review The Cochrane database of systematic reviews 2023

PubMed DOI Cochrane

A Oral zinc for treating diarrhoea in children

Meta Analysis The Cochrane database of systematic reviews 2016

PubMed DOI

A Zinc supplements for preventing otitis media

Meta Analysis The Cochrane database of systematic reviews 2014

PubMed DOI Cochrane

A Zinc for the prevention or treatment of acute viral respiratory tract infections in adults: a rapid systematic review and meta-analysis of randomised controlled trials

Meta Analysis BMJ open 2021

PubMed DOI

A Zinc supplements for preventing otitis media

Meta Analysis The Cochrane database of systematic reviews 2010

PubMed DOI Cochrane

A Zinc supplements for preventing otitis media

Meta Analysis The Cochrane database of systematic reviews 2012

PubMed DOI Cochrane

A Compression bandages or stockings versus no compression for treating venous leg ulcers

Meta Analysis The Cochrane database of systematic reviews 2021

PubMed DOI

A Zinc supplementation for mental and motor development in children