Stress B with Iron

product on market Tablet or Pill 21st Century 🟢 Safety: 94/100
Brand: 21st Century
🟢 94/100

This product looks safe

  • Niacin: 100mg is 2.9× the Tolerable Upper Intake Level (35mg)
  • Folate: 667mg is 667.0× the Tolerable Upper Intake Level (1.0mg)
  • 67% of ingredients have research evidence
D Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Niacin: 100mg is 2.9× the Tolerable Upper Intake Level (35mg)
⚠️ Folate: 667mg is 667.0× the Tolerable Upper Intake Level (1.0mg)

Label Data

1 Tablet(s) Serving Size
Multi-Vitamin and Mineral (MVM) Product Type
67% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
500 mg (556% DV)
14 mg (90% DV)
✅ Within RDA (0.9× RDA of 15 mg) 📚 177 studies (Tier A: 3, B: 90)
RDA 15mg This product: 14mg UL 1000mg
10 mg (833% DV)
📊 8.3× RDA — above typical dose 📚 76 studies (Tier A: 0, B: 33)
RDA 1.2mg This product: 10mg
10 mg (769% DV)
📊 7.7× RDA — above typical dose 📚 12 studies (Tier A: 0, B: 1)
RDA 1.3mg This product: 10mg
100 mg (625% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 2.9× (UL: 35 mg) 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 100mg UL 35mg
5 mg (294% DV)
📊 3.8× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 5mg UL 100mg
667 mcg DFE (167% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 667.0× (UL: 1.0 mg) 📚 225 studies (Tier A: 10, B: 105)
RDA 0.4mg This product: 667mg UL 1.0mg
12 mcg (500% DV)
📊 5.0× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.012mg
45 mcg (150% DV)
✅ 1.5× RDA — within safe limits 📚 26 studies (Tier A: 0, B: 11)
RDA 0.03mg This product: 0.045mg
20 mg (400% DV)
📊 4.0× RDA — above typical dose 📚 1 studies — no high-quality reviews
RDA 5mg This product: 20mg
Calcium
75 mg (6% DV)
Iron
18 mg (100% DV)

Other Ingredients

Starch Hydroxypropyl Methylcellulose Contains Less Than 2% of

Label Claims — Verification

❓ Nutrient
❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (71% of products) Nutrient (61% of products) Approved Health (1% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

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

Combined with a healthy diet and plenty of rest, 21st Century Stress B helps provide the extra nutritional support your body may need.

⚠️ 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.

Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or poison control center immediately.

🧪 Formulation Notes

No added Yeast, Preservatives or Artificial Flavors.

Stress B with Iron

Gluten free

Additional Information

Individual results may vary.

Store at room temperature.

Energy & Immune Support

Gluten free

Periods of stress can be taxing on the body.

Guaranteed quality Laboratory tested

Product Details

UPC / SKU 7 40985 22342 0
DSLD Entry Date 2019-08-23
Product Type Multi-Vitamin and Mineral (MVM)
Form Tablet or Pill
Brand 21st Century
DSLD ID 205888
Data Updated 2026-04-11

Research Evidence

566 Research Sources
56 Avg Quality Score
240 Meta Analysis
100 Clinical Trial
74 Systematic Review
71 Guideline
58 Rct
11 Cochrane Review
4 Regulatory Source
2 Other
2 Narrative Review
1 Observational
1 Openfda Safety
A Systematic review and meta-analysis of intravenous iron therapy for patients with heart failure and iron deficiency
Meta Analysis Nature medicine 2025
PubMed DOI
A Intermittent iron supplementation for reducing anaemia and its associated impairments in adolescent and adult menstruating women
Meta Analysis The Cochrane database of systematic reviews 2019
PubMed DOI Cochrane
A Oral or parenteral iron supplementation to reduce deferral, iron deficiency and/or anaemia in blood donors
Meta Analysis The Cochrane database of systematic reviews 2014
PubMed DOI Cochrane
A Serum or plasma ferritin concentration as an index of iron deficiency and overload
Meta Analysis The Cochrane database of systematic reviews 2021
PubMed DOI
A Non-invasive diagnostic tests for Helicobacter pylori infection
Meta Analysis The Cochrane database of systematic reviews 2018
PubMed DOI
A Hypoxia-inducible factor stabilisers for the anaemia of chronic kidney disease
Meta Analysis The Cochrane database of systematic reviews 2022
PubMed DOI
A Wheat flour fortification with iron and other micronutrients for reducing anaemia and improving iron status in populations
Meta Analysis The Cochrane database of systematic reviews 2021
PubMed DOI
A Fortification of condiments and seasonings with iron for preventing anaemia and improving health
Meta Analysis The Cochrane database of systematic reviews 2023
PubMed DOI
A Screening and Supplementation for Iron Deficiency and Iron Deficiency Anemia During Pregnancy: US Preventive Services Task Force Recommendation Statement.
Guideline JAMA 2024
PubMed DOI
A Psychiatric and cognitive outcomes of iron supplementation in non-anemic children, adolescents, and menstruating adults: A meta-analysis and systematic review
Meta Analysis Neuroscience and biobehavioral reviews 2025
PubMed DOI
View all evidence for Iron →

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