TriFlex

product on market Other (e.g. tea bag) GNC Women's Ultra Mega Safety: 100/100
100/100

This product looks safe

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

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Glucosamine, chondroitin, and MSM are commonly used to support joint health, though research shows mixed or limited evidence regarding their efficacy. Vitamin C provides antioxidant support and aids in collagen synthesis. These ingredients are generally considered safe for most users.

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

Label

Product Label

Label for TriFlex
Open Full PDF View on NIH DSLD →
Details

Label Data

3 Caplet(s)
Serving Size
Other Combinations
Product Type
33%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
30 mg (50% DV)
Sodium
130 mg (5% DV)
Market median: 1000.0mg (1115 products) 24 studies (A:0, B:9)
Market median: 600.0mg (79 products) 25 studies (A:0, B:6)
MSM
900 mg
Market median: 1000.0mg (2 products)
Market median: 100.0mg (173 products)

Other Ingredients

Cellulose Titanium Dioxide Vegetable Acetoglycerides
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: As a dietary supplement, take the contents of one pack daily with food.

Warnings & Precautions

CONTAINS: Crustaceans (Shrimp).

KEEP OUT OF REACH OF CHILDREN.

WARNING: Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition. Discontinue use two weeks prior to surgery.

Formulation Notes

No Artificial Colors, No Artificial Flavors, No Wheat, No Gluten, No Dairy, Yeast Free.

Additional Information

ACTUAL SIZE

Conforms to USP <2091> for weight. Meets USP <2040> for disintegration.

Store in a cool, dry place.

#Compared to leading brands.

CLINICALLY STUDIED^

CODE 329511 GLG

Each pack contains:

GNC GUARANTEE Use any GNC supplement for as little as 10 days. If you are not 100% completely satisfied, return the unused portion of the product with proof of purchase to your GNC store for a complete refund of your purchase price. No questions asked!

GNC QUALITY COMMITMENT GNC, the leader in the development and manufacture of dietary supplements, is committed to producing the highest quality products available. This commitment begins with quality designed supplement formulations. Every raw material that goes into a GNC supplement is guaranteed as to quality and potency. Each product is dated and then shipped immediately to our stores, so you can be sure you are purchasing the freshest supplements available. At GNC, we extend our quality commitment to you by offering our money-back guarantee.

Joint

NEW & IMPROVED

Metadata

Product Details

DSLD Entry Date2012-02-23
Product TypeOther Combinations
FormOther (e.g. tea bag)
DSLD ID5894
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
A Vitamin C supplementation in pregnancy
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
View all evidence for Vitamin C →
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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.