Stress B
97/100
This product looks safe
- Niacin: 100mg is 2.9× the Tolerable Upper Intake Level (35mg)
- 73% of ingredients have research evidence
C
Label Compliance Grade
Product Label
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Safety Alerts
⚠️ Niacin: 100mg is 2.9× the Tolerable Upper Intake Level (35mg)
Label Data
1 Tablet(s)
Serving Size
Other Combinations
Product Type
73%
Evidence Coverage
Supplement Facts — Evidence Check
Vitamin C
500 mg
(833% DV)
30 IU
(100% DV)
✅ 1.3× RDA — within safe limits
📚 177 studies (Tier A: 3, B: 90)
10 mg
(667% DV)
📊 8.3× RDA — above typical dose
📚 76 studies (Tier A: 0, B: 33)
10 mg
(588% DV)
📊 7.7× RDA — above typical dose
📚 12 studies (Tier A: 0, B: 1)
100 mg
(500% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 2.9× (UL: 35 mg)
📚 193 studies (Tier A: 5, B: 63)
5 mg
(250% DV)
📊 3.8× RDA — above typical dose (UL: 100 mg)
📚 113 studies (Tier A: 3, B: 35)
400 mcg
(100% DV)
✅ Within RDA (1.0× RDA of 0.4 mg)
📚 225 studies (Tier A: 10, B: 105)
12 mcg
(200% DV)
📊 5.0× RDA — above typical dose
📚 138 studies (Tier A: 1, B: 44)
45 mcg
(15% DV)
✅ 1.5× RDA — within safe limits
📚 26 studies (Tier A: 0, B: 11)
20 mg
(200% DV)
📊 4.0× RDA — above typical dose
📚 1 studies — no high-quality reviews
Calcium
70 mg
(7% DV)
Other Ingredients
Cellulose
Starch
Stearic Acid
Croscarmellose Sodium
Silicon Dioxide
Titanium Dioxide
Polydextrose
Magnesium Stearate
Artificial Colors Added
Label Claims — Verification
❓
All Other
All Other (99% of products)
Structure/Function (83% of products)
Nutrient (54% of products)
Target Groups
Adult (18 - 50 Years)
Product Information
📋 Directions for Use
Directions: Take one (1) tablet daily with any meal for maximum daily results, or as directed by your healthcare provider. Do not exceed recommended dosage.
⚠️ Warnings & Precautions
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, Salt, Yeast, Preservatives.
Additional Information
Store at room temperature.
Unconditionally guaranteed for purity, freshness and label potency.
MADE IN USA
0706
10% FREE
Studies have shown that during periods of unusual physical stress, your body uses up more vitamins than normal.
Product Details
UPC / SKU
7 40985 22327 7
DSLD Entry Date
2012-08-24
Product Type
Other Combinations
Form
Tablet or Pill
Brand
21st Century
DSLD ID
11599
Data Updated
2026-04-11
Research Evidence
371
Research Sources
54
Avg Quality Score
148
Meta Analysis
82
Systematic Review
71
Rct
62
Clinical Trial
2
Regulatory Source
1
Cochrane Review
1
Narrative Review
1
Other
1
Openfda Safety
A
Vitamin C supplementation for the primary prevention of cardiovascular disease
A
Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
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