🟢 98/100

This product looks safe

  • Manganese: 73mg is 6.6× the Tolerable Upper Intake Level (11mg)
  • 50% of ingredients have research evidence
C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Manganese: 73mg is 6.6× the Tolerable Upper Intake Level (11mg)

Label Data

1 Capsule(s) Serving Size
Other Combinations Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
80 mg (133% DV)
50 IU (12.5% DV)
✅ Within RDA (0.1× RDA of 0.015 mg) 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.00125mg UL 0.1mg
10 IU (33% DV)
✅ Within RDA (0.4× RDA of 15 mg) 📚 177 studies (Tier A: 3, B: 90)
RDA 15mg This product: 6.7mg UL 1000mg
5 mg (333% DV)
📊 4.2× RDA — above typical dose 📚 76 studies (Tier A: 0, B: 33)
RDA 1.2mg This product: 5mg
10 mg (500% DV)
📊 7.7× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 10mg UL 100mg
10 mcg (166% DV)
📊 4.2× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.01mg
Calcium
26 mg (2.6% DV)
73 mg (3650% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 6.6× (UL: 11 mg) 📚 8 studies — no high-quality reviews
RDA 2.3mg This product: 73mg UL 11mg
Green Pea Concentrate
200 mg
Horsetail
100 mg
30 mg
✅ Within RDA (0.1× RDA of 550 mg) 📚 36 studies (Tier A: 1, B: 7)
RDA 550mg This product: 30mg UL 3500mg
📊 Market median: 500.0mg (283 products) 📚 173 studies (Tier A: 0, B: 62)
This product: 20mg
raw Bovine Liver Concentrate
10 mg
Rose Hips
5 mg

Other Ingredients

Rice Flour Vegetable Lubricant Gelatin

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: One capsule daily, or more, as directed by a health care professional.

⚠️ Warnings & Precautions

Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing.

Keep out of reach of children.

Contains soy. May contain races of lactose (milk) used in processing.

🧪 Formulation Notes

Manganese and Vitamin complex

Contains soy.

Additional Information

Sold only for dispensing by a licensed health care professional.

Progressive Laboratories manufactured this product in its 3rd party GMP-inspected facility. (Good Manufacturing Practices)

Rev. A2014 Reorder No. 426

GMP 3rd party confirmed compliant

PL Since 1972

Product Details

UPC / SKU 3 51821 00426 6
DSLD Entry Date 2017-03-24
Product Type Other Combinations
Form Capsule
DSLD ID 71414
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 in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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