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G/C 1000

product on market Capsule Progressive Professional from Progressive Laboratories Safety: 90/100
90/100

This product looks safe

  • Manganese: 30mg is 2.7× the Tolerable Upper Intake Level (11mg)
  • 50% of ingredients have research evidence
C Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Glucosamine and chondroitin are commonly used to support joint health, though research evidence for their efficacy is mixed. Vitamin C and manganese serve as essential cofactors for connective tissue synthesis. Overall, clinical evidence for this specific combination in joint support is considered limited.

AI-generated summary based on research evidence. Not medical advice.

Alerts

Safety Alerts

Manganese: 30mg is 2.7× the Tolerable Upper Intake Level (11mg)

Label

Product Label

Label for G/C 1000
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Capsule(s)
Serving Size
120
Servings
Other Combinations
Product Type
50%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
60 mg (67% DV)
30 mg (1304% DV)
Exceeds UL by 2.7× (UL: 11 mg) 9 studies — no high-quality reviews
Market median: 1000.0mg (1115 products) 24 studies (A:0, B:9)
Market median: 600.0mg (79 products) 25 studies (A:0, B:6)

Other Ingredients

Gelatin Capsule Vegetable Lubricant
Claims

Label Claims — Verification

Unverified All Other
Info

Product Information

Directions for Use

Directions: Take two capsules twice daily, or more, preferably with meals, as recommended 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 reach of children.

Contains: crustacean shell fish (crab and shrimp).

Formulation Notes

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

Glucosamine HCI and Chondroitin Sulfate

Additional Information

Sold only for dispensing by a licensed health care professional.

GMP Good Manufacturing Practice Certified GMP Compliant 21 CFR 111

Metadata

Product Details

UPC / SKU3 51821 07232 6
DSLD Entry Date2022-02-23
Product TypeOther Combinations
FormCapsule
DSLD ID261684
Data Updated2026-04-11
Research

Research Evidence

371
Research Sources
54
Avg Quality
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
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Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017 PubMed DOI
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
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 PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021 PubMed DOI
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.