🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 33% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

1 Capsule(s) Serving Size
180 Servings
Other Combinations Product Type
33% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
89 mg (148% DV)
7 mg (2% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 7mg
📊 Market median: 1000.0mg (2 products)
This product: 800mg

Other Ingredients

Gelatin Vegetable Lubricant

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 three times daily, or more, as directed by a health care professional.

⚠️ Warnings & Precautions

Pregnant and/or lactating women should consult their physician prior to use.

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

Keep out of the reach of children.

🧪 Formulation Notes

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

Methyl Sulfonyl Methane with Magnesium Ascorbate

Additional Information

Sold only for dispensing by a licensed health professional.

GMP Good Manufacturing Practice Certified GMP Compliant 21 CFR 111

Product Details

UPC / SKU 3 51821 08401 5
DSLD Entry Date 2022-04-11
Product Type Other Combinations
Form Capsule
DSLD ID 261984
Data Updated 2026-04-10

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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